Merge s390 update into current tree

Documentation/s390/CommonIO

@@ -123,9 +123,6 @@ Command line parameters
 
 * /proc/chpids
 
-  This entry will only show up if you specified CONFIG_CHSC=y during kernel
-  config.
-
   This entry serves a dual purpose:
  
   - show which chpids are currently known to Linux and their status (online,

arch/s390/Config.help

@@ -160,25 +160,11 @@ CONFIG_IPL_TAPE
   Select "vm_reader" if you are running under VM/ESA and want
   to IPL the image from the emulated card reader.
 
-CONFIG_FAST_IRQ
-  Select this option in order to get the interrupts processed faster
-  on your S/390 or zSeries machine.  If selected, after an interrupt
-  is processed, the channel subsystem will be asked for other pending
-  interrupts which will also be processed before leaving the interrupt
-  context.  This speeds up the I/O a lot. Say "Y".
-
 CONFIG_MACHCHK_WARNING
   Select this option if you want the machine check handler on IBM S/390 or 
   zSeries to process warning machine checks (e.g. on power failures). 
   If unsure, say "Y".
 
-CONFIG_CHSC
-  Select this option if you want the s390 common I/O layer to use information
-  obtained by channel subsystem calls. This will enable Linux to process link
-  failures and resource accessibility events. Moreover, if you have procfs
-  enabled, you'll be able to toggle chpids logically offline and online. Even
-  if you don't understand what this means, you should say "Y".
-
 CONFIG_PROCESS_DEBUG
   Say Y to print all process fault locations to the console.  This is
   a debugging option; you probably do not want to set it unless you

arch/s390/config.in

@@ -17,22 +17,20 @@ define_bool CONFIG_ARCH_S390 y
 source init/Config.in
 
 mainmenu_option next_comment
+comment 'Base setup'
 comment 'Processor type and features'
 bool 'Symmetric multi-processing support' CONFIG_SMP
 bool 'IEEE FPU emulation' CONFIG_MATHEMU
-endmenu
 
-mainmenu_option next_comment
-comment 'Base setup'
-bool 'Fast IRQ handling' CONFIG_FAST_IRQ
+comment 'I/O subsystem configuration'
 bool 'Process warning machine checks' CONFIG_MACHCHK_WARNING
-bool 'Use chscs for Common I/O' CONFIG_CHSC
-
 tristate 'QDIO support' CONFIG_QDIO
-  if [ "$CONFIG_QDIO" != "n" ]; then
+if [ "$CONFIG_QDIO" != "n" ]; then
   bool '   Performance statistics in /proc' CONFIG_QDIO_PERF_STATS
-  fi
+fi
 
+comment 'Misc'
+bool 'Preemptible Kernel' CONFIG_PREEMPT
 bool 'Builtin IPL record support' CONFIG_IPL
 if [ "$CONFIG_IPL" = "y" ]; then
   choice 'IPL method generated into head.S' \
@@ -68,7 +66,6 @@ source fs/Config.in
 mainmenu_option next_comment
 comment 'Kernel hacking'
 
-#bool 'Debug kmalloc/kfree' CONFIG_DEBUG_MALLOC
 #if [ "$CONFIG_CTC" = "y" ]; then
 #  bool 'Remote GDB kernel debugging' CONFIG_REMOTE_DEBUG
 #fi

arch/s390/defconfig

@@ -30,6 +30,10 @@ CONFIG_MODULES=y
 # CONFIG_MODVERSIONS is not set
 CONFIG_KMOD=y
 
+#
+# Base setup
+#
+
 #
 # Processor type and features
 #
@@ -37,13 +41,16 @@ CONFIG_SMP=y
 CONFIG_MATHEMU=y
 
 #
-# Base setup
+# I/O subsystem configuration
 #
-CONFIG_FAST_IRQ=y
 CONFIG_MACHCHK_WARNING=y
-CONFIG_CHSC=y
 CONFIG_QDIO=m
 # CONFIG_QDIO_PERF_STATS is not set
+
+#
+# Misc
+#
+# CONFIG_PREEMPT is not set
 CONFIG_IPL=y
 # CONFIG_IPL_TAPE is not set
 CONFIG_IPL_VM=y
@@ -84,9 +91,6 @@ CONFIG_SCSI_LOGGING=y
 #
 # CONFIG_SCSI_7000FASST is not set
 # CONFIG_SCSI_ACARD is not set
-# CONFIG_SCSI_AHA152X is not set
-# CONFIG_SCSI_AHA1542 is not set
-# CONFIG_SCSI_AHA1740 is not set
 # CONFIG_SCSI_AIC7XXX is not set
 # CONFIG_SCSI_AIC7XXX_OLD is not set
 # CONFIG_SCSI_DPT_I2O is not set
@@ -114,7 +118,6 @@ CONFIG_SCSI_LOGGING=y
 # CONFIG_SCSI_PCI2220I is not set
 # CONFIG_SCSI_PSI240I is not set
 # CONFIG_SCSI_QLOGIC_FAS is not set
-# CONFIG_SCSI_SIM710 is not set
 # CONFIG_SCSI_SYM53C416 is not set
 # CONFIG_SCSI_T128 is not set
 # CONFIG_SCSI_U14_34F is not set
@@ -153,7 +156,7 @@ CONFIG_MD_RAID0=m
 CONFIG_MD_RAID1=m
 CONFIG_MD_RAID5=m
 # CONFIG_MD_MULTIPATH is not set
-CONFIG_BLK_DEV_LVM=m
+# CONFIG_BLK_DEV_LVM is not set
 
 #
 # Character device drivers
@@ -226,25 +229,22 @@ CONFIG_IP_MULTICAST=y
 # CONFIG_INET_ECN is not set
 # CONFIG_SYN_COOKIES is not set
 CONFIG_IPV6=m
-# CONFIG_KHTTPD is not set
-# CONFIG_ATM is not set
-# CONFIG_VLAN_8021Q is not set
 
 #
+#    SCTP Configuration (EXPERIMENTAL)
 #
-#
+CONFIG_IPV6_SCTP__=m
+# CONFIG_IP_SCTP is not set
+# CONFIG_ATM is not set
+# CONFIG_VLAN_8021Q is not set
+# CONFIG_LLC is not set
 # CONFIG_IPX is not set
 # CONFIG_ATALK is not set
-
-#
-# Appletalk devices
-#
 # CONFIG_DEV_APPLETALK is not set
 # CONFIG_DECNET is not set
 # CONFIG_BRIDGE is not set
 # CONFIG_X25 is not set
 # CONFIG_LAPB is not set
-# CONFIG_LLC is not set
 # CONFIG_NET_DIVERT is not set
 # CONFIG_ECONET is not set
 # CONFIG_WAN_ROUTER is not set
@@ -299,7 +299,7 @@ CONFIG_RAMFS=y
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y
-CONFIG_DEVFS_MOUNT=y
+# CONFIG_DEVFS_MOUNT is not set
 # CONFIG_DEVFS_DEBUG is not set
 # CONFIG_DEVPTS_FS is not set
 # CONFIG_QNX4FS_FS is not set
@@ -311,6 +311,9 @@ CONFIG_EXT2_FS=y
 # CONFIG_UDF_RW is not set
 # CONFIG_UFS_FS is not set
 # CONFIG_UFS_FS_WRITE is not set
+# CONFIG_XFS_FS is not set
+# CONFIG_XFS_RT is not set
+# CONFIG_XFS_QUOTA is not set
 
 #
 # Network File Systems
@@ -362,6 +365,11 @@ CONFIG_IBM_PARTITION=y
 #
 CONFIG_MAGIC_SYSRQ=y
 
+#
+# Security options
+#
+CONFIG_SECURITY_CAPABILITIES=y
+
 #
 # Library routines
 #

arch/s390/kernel/Makefile

@@ -5,10 +5,10 @@
 EXTRA_TARGETS	:= head.o init_task.o
 EXTRA_AFLAGS	:= -traditional
 
-export-objs	:= debug.o ebcdic.o irq.o s390_ext.o smp.o s390_ksyms.o
-obj-y	:= entry.o bitmap.o traps.o time.o process.o irq.o \
+export-objs	:= debug.o ebcdic.o s390_ext.o smp.o s390_ksyms.o
+obj-y	:= entry.o bitmap.o traps.o time.o process.o \
             setup.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \
-            semaphore.o s390fpu.o reipl.o s390_ext.o debug.o
+            semaphore.o reipl.o s390_ext.o debug.o
 
 obj-$(CONFIG_MODULES)		+= s390_ksyms.o
 obj-$(CONFIG_SMP)		+= smp.o

arch/s390/kernel/debug.c

@@ -21,6 +21,7 @@
 #include <asm/semaphore.h>
 
 #include <linux/module.h>
+#include <linux/init.h>
 
 #include <asm/debug.h>
 
@@ -146,7 +147,7 @@ static debug_info_t *debug_area_first = NULL;
 static debug_info_t *debug_area_last = NULL;
 DECLARE_MUTEX(debug_lock);
 
-static int initialized = 0;
+static int initialized;
 
 static struct file_operations debug_file_ops = {
 	read:    debug_output,
@@ -591,7 +592,7 @@ debug_info_t *debug_register
 
 	MOD_INC_USE_COUNT;
 	if (!initialized)
-		debug_init();
+		BUG();
 	down(&debug_lock);
 
         /* create new debug_info */
@@ -828,18 +829,16 @@ debug_entry_t *debug_sprintf_exception(debug_info_t* id,
  * - is called exactly once to initialize the debug feature
  */
 
-int debug_init(void)
+static int __init debug_init(void)
 {
 	int rc = 0;
 
 	down(&debug_lock);
-	if (!initialized) {
 #ifdef CONFIG_PROC_FS
 	debug_proc_root_entry = proc_mkdir(DEBUG_DIR_ROOT, NULL);
 #endif /* CONFIG_PROC_FS */
 	printk(KERN_INFO "debug: Initialization complete\n");
 	initialized = 1;
-	}
 	up(&debug_lock);
 
 	return rc;
@@ -1173,27 +1172,9 @@ int debug_sprintf_format_fn(debug_info_t * id, struct debug_view *view,
 }
 
 /*
- * init_module:
- */
-
-#ifdef MODULE
-int init_module(void)
-{
-	int rc = 0;
-#ifdef DEBUG
-	printk("debug_module_init: \n");
-#endif
-	rc = debug_init();
-	if (rc) 
-		printk(KERN_INFO "debug: an error occurred with debug_init\n");
-	return rc;
-}
-
-/*
- * cleanup_module:
+ * clean up module
  */
-
-void cleanup_module(void)
+void __exit debug_exit(void)
 {
 #ifdef DEBUG
 	printk("debug_cleanup_module: \n");
@@ -1204,7 +1185,12 @@ void cleanup_module(void)
 	return;
 }
 
-#endif			/* MODULE */
+/*
+ * module definitions
+ */
+core_initcall(debug_init);
+module_exit(debug_exit);
+MODULE_LICENSE("GPL");
 
 EXPORT_SYMBOL(debug_register);
 EXPORT_SYMBOL(debug_unregister); 

arch/s390/kernel/head.S

@@ -653,5 +653,5 @@ _stext:	basr  %r13,0                    # get base
 .Lstart:    .long  start_kernel
 .Lbss_bgn:  .long  __bss_start
 .Lbss_end:  .long  _end
-.Laregs:    .long  0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0
+.Laregs:    .long  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
 

arch/s390/kernel/init_task.c

@@ -15,7 +15,7 @@
 
 static struct fs_struct init_fs = INIT_FS;
 static struct files_struct init_files = INIT_FILES;
-static struct signal_struct init_signals = INIT_SIGNALS;
+static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
 struct mm_struct init_mm = INIT_MM(init_mm);
 
 /*

arch/s390/kernel/irq.c

-/*
- *  arch/s390/kernel/irq.c
- *
- *  S390 version
- *    Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
- *    Author(s): Ingo Adlung (adlung@de.ibm.com)
- *
- *  Derived from "arch/i386/kernel/irq.c"
- *    Copyright (C) 1992, 1999 Linus Torvalds, Ingo Molnar
- *
- *  S/390 I/O interrupt processing and I/O request processing is
- *   implemented in arch/s390/kernel/s390io.c
- */
-#include <linux/module.h>
-#include <linux/config.h>
-#include <linux/ptrace.h>
-#include <linux/errno.h>
-#include <linux/kernel_stat.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/ioport.h>
-#include <linux/interrupt.h>
-#include <linux/timex.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/random.h>
-#include <linux/smp.h>
-#include <linux/threads.h>
-#include <linux/smp_lock.h>
-#include <linux/init.h>
-#include <linux/seq_file.h>
-
-#include <asm/system.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/bitops.h>
-#include <asm/smp.h>
-#include <asm/pgtable.h>
-#include <asm/delay.h>
-#include <asm/lowcore.h>
-
-void          s390_init_IRQ   ( void );
-void          s390_free_irq   ( unsigned int irq, void *dev_id);
-int           s390_request_irq( unsigned int irq,
-                     void           (*handler)(int, void *, struct pt_regs *),
-                     unsigned long  irqflags,
-                     const char    *devname,
-                     void          *dev_id);
-
-#if 0
-/*
- * The following vectors are part of the Linux architecture, there
- * is no hardware IRQ pin equivalent for them, they are triggered
- * through the ICC by us (IPIs), via smp_message_pass():
- */
-BUILD_SMP_INTERRUPT(reschedule_interrupt)
-BUILD_SMP_INTERRUPT(invalidate_interrupt)
-BUILD_SMP_INTERRUPT(stop_cpu_interrupt)
-BUILD_SMP_INTERRUPT(mtrr_interrupt)
-BUILD_SMP_INTERRUPT(spurious_interrupt)
-#endif
-
-int show_interrupts(struct seq_file *p, void *v)
-{
-	int i, j;
-
-	seq_puts(p, "           ");
-
-	for (j=0; j<smp_num_cpus; j++)
-		seq_printf(p, "CPU%d       ",j);
-
-	seq_putc(p, '\n');
-
-	for (i = 0 ; i < NR_IRQS ; i++) {
-		if (ioinfo[i] == INVALID_STORAGE_AREA)
-			continue;
-
-		seq_printf(p, "%3d: ",i);
-		seq_printf(p, "  %s", ioinfo[i]->irq_desc.name);
-
-		seq_putc(p, '\n');
-	
-	} /* endfor */
-
-	return 0;
-}
-
-/*
- * Global interrupt locks for SMP. Allow interrupts to come in on any
- * CPU, yet make cli/sti act globally to protect critical regions..
- */
-#ifdef CONFIG_SMP
-atomic_t global_irq_holder = ATOMIC_INIT(NO_PROC_ID);
-atomic_t global_irq_lock = ATOMIC_INIT(0);
-atomic_t global_irq_count = ATOMIC_INIT(0);
-atomic_t global_bh_count;
-
-/*
- * "global_cli()" is a special case, in that it can hold the
- * interrupts disabled for a longish time, and also because
- * we may be doing TLB invalidates when holding the global
- * IRQ lock for historical reasons. Thus we may need to check
- * SMP invalidate events specially by hand here (but not in
- * any normal spinlocks)
- *
- * Thankfully we don't need this as we can deliver flush tlbs with
- * interrupts disabled DJB :-)
- */
-#define check_smp_invalidate(cpu)
-
-extern void show_stack(unsigned long* esp);
-
-static void show(char * str)
-{
-	int cpu = smp_processor_id();
-
-	printk("\n%s, CPU %d:\n", str, cpu);
-	printk("irq:  %d [%d]\n",
-	       atomic_read(&global_irq_count),local_irq_count(smp_processor_id()));
-	printk("bh:   %d [%d]\n",
-	       atomic_read(&global_bh_count),local_bh_count(smp_processor_id()));
-	show_stack(NULL);
-}
-
-#define MAXCOUNT 100000000
-
-static inline void wait_on_bh(void)
-{
-	int count = MAXCOUNT;
-	do {
-		if (!--count) {
-			show("wait_on_bh");
-			count = ~0;
-		}
-		/* nothing .. wait for the other bh's to go away */
-	} while (atomic_read(&global_bh_count) != 0);
-}
-
-static inline void wait_on_irq(int cpu)
-{
-	int count = MAXCOUNT;
-
-	for (;;) {
-
-		/*
-		 * Wait until all interrupts are gone. Wait
-		 * for bottom half handlers unless we're
-		 * already executing in one..
-		 */
-		if (!atomic_read(&global_irq_count)) {
-			if (local_bh_count(cpu)||
-			    !atomic_read(&global_bh_count))
-				break;
-		}
-
-		/* Duh, we have to loop. Release the lock to avoid deadlocks */
-		atomic_set(&global_irq_lock, 0);
-
-		for (;;) {
-			if (!--count) {
-				show("wait_on_irq");
-				count = ~0;
-			}
-			local_irq_enable();
-			SYNC_OTHER_CORES(cpu);
-			local_irq_disable();
-			check_smp_invalidate(cpu);
-			if (atomic_read(&global_irq_count))
-				continue;
-			if (atomic_read(&global_irq_lock))
-				continue;
-			if (!local_bh_count(cpu)
-			    && atomic_read(&global_bh_count))
-				continue;
-			if (!atomic_compare_and_swap(0, 1, &global_irq_lock))
-				 break;
-		}
-	}
-}
-
-/*
- * This is called when we want to synchronize with
- * bottom half handlers. We need to wait until
- * no other CPU is executing any bottom half handler.
- *
- * Don't wait if we're already running in an interrupt
- * context or are inside a bh handler.
- */
-void synchronize_bh(void)
-{
-	if (atomic_read(&global_bh_count) && !in_interrupt())
-		wait_on_bh();
-}
-
-/*
- * This is called when we want to synchronize with
- * interrupts. We may for example tell a device to
- * stop sending interrupts: but to make sure there
- * are no interrupts that are executing on another
- * CPU we need to call this function.
- */
-void synchronize_irq(void)
-{
-	if (atomic_read(&global_irq_count)) {
-		/* Stupid approach */
-		cli();
-		sti();
-	}
-}
-
-static inline void get_irqlock(int cpu)
-{
-	if (atomic_compare_and_swap(0, 1, &global_irq_lock) != 0) {
-		/* do we already hold the lock? */
-		if ( cpu == atomic_read(&global_irq_holder))
-			return;
-		/* Uhhuh.. Somebody else got it. Wait.. */
-		do {
-			check_smp_invalidate(cpu);
-		} while (atomic_compare_and_swap(0, 1, &global_irq_lock) != 0);
-	}
-	/*
-	 * We also to make sure that nobody else is running
-	 * in an interrupt context.
-	 */
-	wait_on_irq(cpu);
-
-	/*
-	 * Ok, finally..
-	 */
-	atomic_set(&global_irq_holder,cpu);
-}
-
-#define EFLAGS_I_SHIFT 25
-
-/*
- * A global "cli()" while in an interrupt context
- * turns into just a local cli(). Interrupts
- * should use spinlocks for the (very unlikely)
- * case that they ever want to protect against
- * each other.
- *
- * If we already have local interrupts disabled,
- * this will not turn a local disable into a
- * global one (problems with spinlocks: this makes
- * save_flags+cli+sti usable inside a spinlock).
- */
-void __global_cli(void)
-{
-	unsigned long flags;
-
-	local_save_flags(flags);
-	if (flags & (1 << EFLAGS_I_SHIFT)) {
-		int cpu = smp_processor_id();
-		local_irq_disable();
-		if (!in_irq())
-			get_irqlock(cpu);
-	}
-}
-
-void __global_sti(void)
-{
-
-	if (!in_irq())
-		release_irqlock(smp_processor_id());
-	local_irq_enable();
-}
-
-/*
- * SMP flags value to restore to:
- * 0 - global cli
- * 1 - global sti
- * 2 - local cli
- * 3 - local sti
- */
-unsigned long __global_save_flags(void)
-{
-	int retval;
-	int local_enabled;
-	unsigned long flags;
-
-	local_save_flags(flags);
-	local_enabled = (flags >> EFLAGS_I_SHIFT) & 1;
-	/* default to local */
-	retval = 2 + local_enabled;
-
-	/* check for global flags if we're not in an interrupt */
-	if (!in_irq())
-	{
-		if (local_enabled)
-			retval = 1;
-		if (atomic_read(&global_irq_holder)== smp_processor_id())
-			retval = 0;
-	}
-	return retval;
-}
-
-void __global_restore_flags(unsigned long flags)
-{
-	switch (flags) {
-	case 0:
-		__global_cli();
-		break;
-	case 1:
-		__global_sti();
-		break;
-	case 2:
-		local_irq_disable();
-		break;
-	case 3:
-		local_irq_enable();
-		break;
-	default:
-		printk("global_restore_flags: %08lx (%08lx)\n",
-		       flags, (&flags)[-1]);
-	}
-}
-
-#endif
-
-
-void __init init_IRQ(void)
-{
-        s390_init_IRQ();
-}
-
-
-void free_irq(unsigned int irq, void *dev_id)
-{
-   s390_free_irq( irq, dev_id);
-}
-
-
-int request_irq( unsigned int   irq,
-                 void           (*handler)(int, void *, struct pt_regs *),
-                 unsigned long  irqflags,
-                 const char    *devname,
-                 void          *dev_id)
-{
-   return( s390_request_irq( irq, handler, irqflags, devname, dev_id ) );
-
-}
-
-void init_irq_proc(void)
-{
-        /* For now, nothing... */
-}
-
-#ifdef CONFIG_SMP
-EXPORT_SYMBOL(__global_cli);
-EXPORT_SYMBOL(__global_sti);
-EXPORT_SYMBOL(__global_save_flags);
-EXPORT_SYMBOL(__global_restore_flags);
-EXPORT_SYMBOL(global_irq_holder);
-EXPORT_SYMBOL(global_irq_lock);
-EXPORT_SYMBOL(global_irq_count);
-EXPORT_SYMBOL(global_bh_count);
-#endif
-
-EXPORT_SYMBOL(global_bh_lock);

arch/s390/kernel/process.c

@@ -15,9 +15,6 @@
  * This file handles the architecture-dependent parts of process handling..
  */
 
-#define __KERNEL_SYSCALLS__
-#include <stdarg.h>
-
 #include <linux/config.h>
 #include <linux/errno.h>
 #include <linux/sched.h>
@@ -78,9 +75,10 @@ void default_idle(void)
 
 	/* 
 	 * Wait for external, I/O or machine check interrupt and
-	 * switch of machine check bit after the wait has ended.
+	 * switch off machine check bit after the wait has ended.
 	 */
-	wait_psw.mask = _WAIT_PSW_MASK;
+	wait_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK | PSW_MASK_WAIT |
+		PSW_MASK_IO | PSW_MASK_EXT;
 	asm volatile (
 		"    basr %0,0\n"
 		"0:  la   %0,1f-0b(%0)\n"
@@ -117,35 +115,39 @@ void show_regs(struct pt_regs *regs)
 
 	show_registers(regs);
 	/* Show stack backtrace if pt_regs is from kernel mode */
-	if (!(regs->psw.mask & PSW_PROBLEM_STATE))
+	if (!(regs->psw.mask & PSW_MASK_PSTATE))
 		show_trace((unsigned long *) regs->gprs[15]);
 }
 
+extern void kernel_thread_starter(void);
+__asm__(".align 4\n"
+	"kernel_thread_starter:\n"
+	"    l     15,0(8)\n"
+	"    sr    15,7\n"
+	"    stosm 24(15),3\n"
+	"    lr    2,10\n"
+	"    basr  14,9\n"
+	"    sr    2,2\n"
+	"    br    11\n");
+
 int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
 {
-        int clone_arg = flags | CLONE_VM;
-        int retval;
-
-        __asm__ __volatile__(
-                "     sr    2,2\n"
-                "     lr    3,%1\n"
-                "     l     4,%6\n"     /* load kernel stack ptr of parent */
-                "     svc   %b2\n"                     /* Linux system call*/
-                "     cl    4,%6\n"    /* compare ksp's: child or parent ? */
-                "     je    0f\n"                          /* parent - jump*/
-                "     l     15,%6\n"            /* fix kernel stack pointer*/
-                "     ahi   15,%7\n"
-                "     xc    0(96,15),0(15)\n"           /* clear save area */
-                "     lr    2,%4\n"                        /* load argument*/
-                "     lr    14,%5\n"                      /* get fn-pointer*/
-                "     basr  14,14\n"                             /* call fn*/
-                "     svc   %b3\n"                     /* Linux system call*/
-                "0:   lr    %0,2"
-                : "=a" (retval)
-                : "d" (clone_arg), "i" (__NR_clone), "i" (__NR_exit),
-                  "d" (arg), "d" (fn), "i" (__LC_KERNEL_STACK) , "i" (-STACK_FRAME_OVERHEAD)
-                : "2", "3", "4" );
-        return retval;
+	struct task_struct *p;
+	struct pt_regs regs;
+
+	memset(&regs, 0, sizeof(regs));
+	regs.psw.mask = PSW_KERNEL_BITS;
+	regs.psw.addr = (__u32) kernel_thread_starter | PSW_ADDR_AMODE31;
+	regs.gprs[7] = STACK_FRAME_OVERHEAD;
+	regs.gprs[8] = __LC_KERNEL_STACK;
+	regs.gprs[9] = (unsigned long) fn;
+	regs.gprs[10] = (unsigned long) arg;
+	regs.gprs[11] = (unsigned long) do_exit;
+	regs.orig_gpr2 = -1;
+
+	/* Ok, create the new process.. */
+	p = do_fork(flags | CLONE_VM, 0, &regs, 0, NULL);
+	return IS_ERR(p) ? PTR_ERR(p) : p->pid;
 }
 
 /*
@@ -186,20 +188,28 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long new_stackp,
         frame = ((struct stack_frame *)
 		 (THREAD_SIZE + (unsigned long) p->thread_info)) - 1;
         p->thread.ksp = (unsigned long) frame;
-        memcpy(&frame->childregs,regs,sizeof(struct pt_regs));
+        frame->childregs = *regs;
+	frame->childregs.gprs[2] = 0;	/* child returns 0 on fork. */
         frame->childregs.gprs[15] = new_stackp;
         frame->back_chain = frame->eos = 0;
 
-        /* new return point is ret_from_sys_call */
-        frame->gprs[8] = ((unsigned long) &ret_from_fork) | 0x80000000;
+        /* new return point is ret_from_fork */
+        frame->gprs[8] = (unsigned long) ret_from_fork;
 	/* start disabled because of schedule_tick and rq->lock being held */
 	frame->childregs.psw.mask &= ~0x03000000;
 
         /* fake return stack for resume(), don't go back to schedule */
         frame->gprs[9]  = (unsigned long) frame;
-        /* save fprs, if used in last task */
-	save_fp_regs(&p->thread.fp_regs);
+        /*
+	 * save fprs to current->thread.fp_regs to merge them with
+	 * the emulated registers and then copy the result to the child.
+	 */
+	save_fp_regs(&current->thread.fp_regs);
+	memcpy(&p->thread.fp_regs, &current->thread.fp_regs,
+	       sizeof(s390_fp_regs));
         p->thread.user_seg = __pa((unsigned long) p->mm->pgd) | _SEGMENT_TABLE;
+	/* start process with ar4 pointing to the correct address space */
+	p->thread.ar4 = get_fs().ar4;
         /* Don't copy debug registers */
         memset(&p->thread.per_info,0,sizeof(p->thread.per_info));
         return 0;
@@ -208,7 +218,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long new_stackp,
 asmlinkage int sys_fork(struct pt_regs regs)
 {
 	struct task_struct *p;
-        p = do_fork(SIGCHLD, regs.gprs[15], &regs, 0);
+        p = do_fork(SIGCHLD, regs.gprs[15], &regs, 0, NULL);
 	return IS_ERR(p) ? PTR_ERR(p) : p->pid;
 }
 
@@ -217,12 +227,14 @@ asmlinkage int sys_clone(struct pt_regs regs)
         unsigned long clone_flags;
         unsigned long newsp;
 	struct task_struct *p;
+	int *user_tid;
 
         clone_flags = regs.gprs[3];
         newsp = regs.orig_gpr2;
+	user_tid = (int *) regs.gprs[4];
         if (!newsp)
                 newsp = regs.gprs[15];
-        p = do_fork(clone_flags & ~CLONE_IDLETASK, newsp, &regs, 0);
+        p = do_fork(clone_flags & ~CLONE_IDLETASK, newsp, &regs, 0, user_tid);
 	return IS_ERR(p) ? PTR_ERR(p) : p->pid;
 }
 
@@ -239,7 +251,8 @@ asmlinkage int sys_clone(struct pt_regs regs)
 asmlinkage int sys_vfork(struct pt_regs regs)
 {
 	struct task_struct *p;
-	p = do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs.gprs[15], &regs, 0);
+	p = do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
+		    regs.gprs[15], &regs, 0, NULL);
 	return IS_ERR(p) ? PTR_ERR(p) : p->pid;
 }
 
@@ -255,20 +268,13 @@ asmlinkage int sys_execve(struct pt_regs regs)
         error = PTR_ERR(filename);
         if (IS_ERR(filename))
                 goto out;
-        error = do_execve(filename, (char **) regs.gprs[3], (char **) regs.gprs[4], &regs);
-	if (error == 0)
-	{
+        error = do_execve(filename, (char **) regs.gprs[3],
+			  (char **) regs.gprs[4], &regs);
+	if (error == 0) {
 		current->ptrace &= ~PT_DTRACE;
-		current->thread.fp_regs.fpc=0;
-		if(MACHINE_HAS_IEEE)
-		{
-			__asm__ __volatile__
-			("sr  0,0\n\t"
-			 "sfpc 0,0\n\t"
-				:
-			        :
-                                :"0");
-		}
+		current->thread.fp_regs.fpc = 0;
+		if (MACHINE_HAS_IEEE)
+			asm volatile("sfpc %0,%0" : : "d" (0));
 	}
         putname(filename);
 out:
@@ -281,7 +287,12 @@ asmlinkage int sys_execve(struct pt_regs regs)
  */
 int dump_fpu (struct pt_regs * regs, s390_fp_regs *fpregs)
 {
-	save_fp_regs(fpregs);
+        /*
+	 * save fprs to current->thread.fp_regs to merge them with
+	 * the emulated registers and then copy the result to the dump.
+	 */
+	save_fp_regs(&current->thread.fp_regs);
+	memcpy(fpregs, &current->thread.fp_regs, sizeof(s390_fp_regs));
 	return 1;
 }
 
@@ -295,15 +306,15 @@ void dump_thread(struct pt_regs * regs, struct user * dump)
 	dump->magic = CMAGIC;
 	dump->start_code = 0;
 	dump->start_stack = regs->gprs[15] & ~(PAGE_SIZE - 1);
-	dump->u_tsize = ((unsigned long) current->mm->end_code) >> PAGE_SHIFT;
-	dump->u_dsize = ((unsigned long) (current->mm->brk + (PAGE_SIZE-1))) >> PAGE_SHIFT;
+	dump->u_tsize = current->mm->end_code >> PAGE_SHIFT;
+	dump->u_dsize = (current->mm->brk + PAGE_SIZE - 1) >> PAGE_SHIFT;
 	dump->u_dsize -= dump->u_tsize;
 	dump->u_ssize = 0;
 	if (dump->start_stack < TASK_SIZE)
-		dump->u_ssize = ((unsigned long) (TASK_SIZE - dump->start_stack)) >> PAGE_SHIFT;
-	memcpy(&dump->regs.gprs[0],regs,sizeof(s390_regs));
+		dump->u_ssize = (TASK_SIZE - dump->start_stack) >> PAGE_SHIFT;
+	memcpy(&dump->regs, regs, sizeof(s390_regs));
 	dump_fpu (regs, &dump->regs.fp_regs);
-	memcpy(&dump->regs.per_info,&current->thread.per_info,sizeof(per_struct));
+	dump->regs.per_info = current->thread.per_info;
 }
 
 /*

arch/s390/kernel/s390fpu.c

-/*
- *  arch/s390/kernel/s390fpu.c
- *
- *  S390 version
- *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
- *    Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
- *
- *  s390fpu.h functions for saving & restoring the fpu state.
- *
- *  I couldn't inline these as linux/sched.h included half the world
- *  & was required to at the task structure.
- *  & the functions were too complex to make macros from.
- *  ( & as usual I didn't feel like debugging inline code ).
- */
-
-#include <linux/config.h>
-#include <linux/sched.h>
-
-int save_fp_regs1(s390_fp_regs *fpregs)
-{
-	int has_ieee=MACHINE_HAS_IEEE;
-/*
-  I don't think we can use STE here as this would load
-  fp registers 0 & 2 into memory locations 0 & 1 etc. 
- */	
-	asm volatile ("STD   0,8(%0)\n\t"
-		      "STD   2,24(%0)\n\t"
-		      "STD   4,40(%0)\n\t"
-		      "STD   6,56(%0)"
-                      : 
-		      : "a" (fpregs)
-		      : "memory"
-		);
-	if(has_ieee)
-	{
-		asm volatile ("STFPC 0(%0)\n\t"
-			      "STD   1,16(%0)\n\t"
-			      "STD   3,32(%0)\n\t"
-			      "STD   5,48(%0)\n\t"
-			      "STD   7,64(%0)\n\t"
-			      "STD   8,72(%0)\n\t"
-			      "STD   9,80(%0)\n\t"
-			      "STD   10,88(%0)\n\t"
-			      "STD   11,96(%0)\n\t"
-			      "STD   12,104(%0)\n\t"
-			      "STD   13,112(%0)\n\t"
-			      "STD   14,120(%0)\n\t"
-			      "STD   15,128(%0)\n\t"
-			      : 
-			      : "a" (fpregs)
-			      : "memory"
-			);
-	}
-	return(has_ieee);
-}
-
-
-void save_fp_regs(s390_fp_regs *fpregs)
-{
-#if CONFIG_MATHEMU
-	s390_fp_regs *currentfprs;
-
-	if(!save_fp_regs1(fpregs))
-	{
-		currentfprs=&current->thread.fp_regs;
-		fpregs->fpc=currentfprs->fpc;
-		fpregs->fprs[1].d=currentfprs->fprs[1].d;
-		fpregs->fprs[3].d=currentfprs->fprs[3].d;
-		fpregs->fprs[5].d=currentfprs->fprs[5].d;
-		fpregs->fprs[7].d=currentfprs->fprs[7].d;
-		memcpy(&fpregs->fprs[8].d,&currentfprs->fprs[8].d,sizeof(freg_t)*8);
-	}
-#else
-	save_fp_regs1(fpregs);
-#endif
-}
-
-
-int restore_fp_regs1(s390_fp_regs *fpregs)
-{
-	int has_ieee=MACHINE_HAS_IEEE;
-
-	/* If we don't mask with the FPC_VALID_MASK here
-	 * we've got a very quick shutdown -h now command
-         * via a kernel specification exception.
-	 */
-	fpregs->fpc&=FPC_VALID_MASK;
-	asm volatile ("LD   0,8(%0)\n\t"
-		      "LD   2,24(%0)\n\t"
-		      "LD   4,40(%0)\n\t"
-		      "LD   6,56(%0)"
-                      : 
-		      : "a" (fpregs)
-		      : "memory"
-		);
-	if(has_ieee)
-	{
-		asm volatile ("LFPC 0(%0)\n\t"
-			      "LD   1,16(%0)\n\t"
-			      "LD   3,32(%0)\n\t"
-			      "LD   5,48(%0)\n\t"
-			      "LD   7,64(%0)\n\t"
-			      "LD   8,72(%0)\n\t"
-			      "LD   9,80(%0)\n\t"
-			      "LD   10,88(%0)\n\t"
-			      "LD   11,96(%0)\n\t"
-			      "LD   12,104(%0)\n\t"
-			      "LD   13,112(%0)\n\t"
-			      "LD   14,120(%0)\n\t"
-			      "LD   15,128(%0)\n\t"
-			      : 
-			      : "a" (fpregs)
-			      : "memory"
-			);
-	}
-	return(has_ieee);
-}
-
-void restore_fp_regs(s390_fp_regs *fpregs)
-{
-#if CONFIG_MATHEMU
-	s390_fp_regs *currentfprs;
-
-	if(!restore_fp_regs1(fpregs))
-	{
-		currentfprs=&current->thread.fp_regs;
-		currentfprs->fpc=fpregs->fpc;
-		currentfprs->fprs[1].d=fpregs->fprs[1].d;
-		currentfprs->fprs[3].d=fpregs->fprs[3].d;
-		currentfprs->fprs[5].d=fpregs->fprs[5].d;
-		currentfprs->fprs[7].d=fpregs->fprs[7].d;
-		memcpy(&currentfprs->fprs[8].d,&fpregs->fprs[8].d,sizeof(freg_t)*8);
-	}
-#else
-	restore_fp_regs1(fpregs);
-#endif
-}
-

arch/s390/kernel/setup.c

@@ -52,7 +52,6 @@ unsigned long machine_flags = 0;
 struct { unsigned long addr, size, type; } memory_chunk[16] = { { 0 } };
 #define CHUNK_READ_WRITE 0
 #define CHUNK_READ_ONLY 1
-__u16 boot_cpu_addr;
 int cpus_initialized = 0;
 unsigned long cpu_initialized = 0;
 volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */
@@ -79,7 +78,7 @@ static struct resource data_resource = { "Kernel data", 0, 0 };
 /*
  * cpu_init() initializes state that is per-CPU.
  */
-void __init cpu_init (void)
+void __devinit cpu_init (void)
 {
         int nr = smp_processor_id();
         int addr = hard_smp_processor_id();
@@ -305,7 +304,7 @@ void __init setup_arch(char **cmdline_p)
 	unsigned long start_pfn, end_pfn;
         static unsigned int smptrap=0;
         unsigned long delay = 0;
-	struct _lowcore *lowcore;
+	struct _lowcore *lc;
 	int i;
 
         if (smptrap)
@@ -452,30 +451,28 @@ void __init setup_arch(char **cmdline_p)
         /*
          * Setup lowcore for boot cpu
          */
-	lowcore = (struct _lowcore *)
-		__alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0);
-	memset(lowcore, 0, PAGE_SIZE);
-	lowcore->restart_psw.mask = _RESTART_PSW_MASK;
-	lowcore->restart_psw.addr = _ADDR_31 + (addr_t) &restart_int_handler;
-	lowcore->external_new_psw.mask = _EXT_PSW_MASK;
-	lowcore->external_new_psw.addr = _ADDR_31 + (addr_t) &ext_int_handler;
-	lowcore->svc_new_psw.mask = _SVC_PSW_MASK;
-	lowcore->svc_new_psw.addr = _ADDR_31 + (addr_t) &system_call;
-	lowcore->program_new_psw.mask = _PGM_PSW_MASK;
-	lowcore->program_new_psw.addr = _ADDR_31 + (addr_t) &pgm_check_handler;
-        lowcore->mcck_new_psw.mask = _MCCK_PSW_MASK;
-	lowcore->mcck_new_psw.addr = _ADDR_31 + (addr_t) &mcck_int_handler;
-	lowcore->io_new_psw.mask = _IO_PSW_MASK;
-	lowcore->io_new_psw.addr = _ADDR_31 + (addr_t) &io_int_handler;
-	lowcore->ipl_device = S390_lowcore.ipl_device;
-	lowcore->kernel_stack = ((__u32) &init_thread_union) + 8192;
-	lowcore->async_stack = (__u32)
+	lc = (struct _lowcore *) __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0);
+	memset(lc, 0, PAGE_SIZE);
+	lc->restart_psw.mask = PSW_BASE_BITS;
+	lc->restart_psw.addr = PSW_ADDR_AMODE31 + (__u32) restart_int_handler;
+	lc->external_new_psw.mask = PSW_KERNEL_BITS;
+	lc->external_new_psw.addr = PSW_ADDR_AMODE31 + (__u32) ext_int_handler;
+	lc->svc_new_psw.mask = PSW_KERNEL_BITS;
+	lc->svc_new_psw.addr = PSW_ADDR_AMODE31 + (__u32) system_call;
+	lc->program_new_psw.mask = PSW_KERNEL_BITS;
+	lc->program_new_psw.addr = PSW_ADDR_AMODE31 + (__u32)pgm_check_handler;
+        lc->mcck_new_psw.mask = PSW_KERNEL_BITS;
+	lc->mcck_new_psw.addr = PSW_ADDR_AMODE31 + (__u32) mcck_int_handler;
+	lc->io_new_psw.mask = PSW_KERNEL_BITS;
+	lc->io_new_psw.addr = PSW_ADDR_AMODE31 + (__u32) io_int_handler;
+	lc->ipl_device = S390_lowcore.ipl_device;
+	lc->kernel_stack = ((__u32) &init_thread_union) + 8192;
+	lc->async_stack = (__u32)
 		__alloc_bootmem(2*PAGE_SIZE, 2*PAGE_SIZE, 0) + 8192;
-	lowcore->jiffy_timer = -1LL;
-	set_prefix((__u32) lowcore);
+	lc->jiffy_timer = -1LL;
+	set_prefix((__u32) lc);
         cpu_init();
-        boot_cpu_addr = S390_lowcore.cpu_data.cpu_addr;
-        __cpu_logical_map[0] = boot_cpu_addr;
+        __cpu_logical_map[0] = S390_lowcore.cpu_data.cpu_addr;
 
 	/*
 	 * Create kernel page tables and switch to virtual addressing.
@@ -524,11 +521,14 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 		seq_printf(m, "vendor_id       : IBM/S390\n"
 			       "# processors    : %i\n"
 			       "bogomips per cpu: %lu.%02lu\n",
-			       smp_num_cpus, loops_per_jiffy/(500000/HZ),
+			       num_online_cpus(), loops_per_jiffy/(500000/HZ),
 			       (loops_per_jiffy/(5000/HZ))%100);
 	}
 	if (cpu_online_map & (1 << n)) {
-		cpuinfo = &safe_get_cpu_lowcore(n)->cpu_data;
+		if (smp_processor_id() == n)
+			cpuinfo = &S390_lowcore.cpu_data;
+		else
+			cpuinfo = &lowcore_ptr[n]->cpu_data;
 		seq_printf(m, "processor %li: "
 			       "version = %02X,  "
 			       "identification = %06X,  "

arch/s390/kernel/signal.c

@@ -49,22 +49,23 @@ typedef struct
 	struct ucontext uc;
 } rt_sigframe;
 
-asmlinkage int FASTCALL(do_signal(struct pt_regs *regs, sigset_t *oldset));
+int do_signal(struct pt_regs *regs, sigset_t *oldset);
 
 /*
  * Atomically swap in the new signal mask, and wait for a signal.
  */
 asmlinkage int
-sys_sigsuspend(struct pt_regs * regs,int history0, int history1, old_sigset_t mask)
+sys_sigsuspend(struct pt_regs * regs, int history0, int history1,
+	       old_sigset_t mask)
 {
 	sigset_t saveset;
 
 	mask &= _BLOCKABLE;
-	spin_lock_irq(&current->sigmask_lock);
+	spin_lock_irq(&current->sig->siglock);
 	saveset = current->blocked;
 	siginitset(&current->blocked, mask);
 	recalc_sigpending();
-	spin_unlock_irq(&current->sigmask_lock);
+	spin_unlock_irq(&current->sig->siglock);
 	regs->gprs[2] = -EINTR;
 
 	while (1) {
@@ -88,11 +89,11 @@ sys_rt_sigsuspend(struct pt_regs * regs,sigset_t *unewset, size_t sigsetsize)
 		return -EFAULT;
 	sigdelsetmask(&newset, ~_BLOCKABLE);
 
-	spin_lock_irq(&current->sigmask_lock);
+	spin_lock_irq(&current->sig->siglock);
 	saveset = current->blocked;
 	current->blocked = newset;
 	recalc_sigpending();
-	spin_unlock_irq(&current->sigmask_lock);
+	spin_unlock_irq(&current->sig->siglock);
 	regs->gprs[2] = -EINTR;
 
 	while (1) {
@@ -147,37 +148,39 @@ sys_sigaltstack(const stack_t *uss, stack_t *uoss, struct pt_regs *regs)
 static int save_sigregs(struct pt_regs *regs,_sigregs *sregs)
 {
 	int err;
-	s390_fp_regs fpregs;
-  
-	err = __copy_to_user(&sregs->regs,regs,sizeof(_s390_regs_common));
-	if(!err)
-	{
-		save_fp_regs(&fpregs);
-		err=__copy_to_user(&sregs->fpregs,&fpregs,sizeof(fpregs));
-	}
-	return(err);
   
+	err = __copy_to_user(&sregs->regs, regs, sizeof(_s390_regs_common));
+	if (err != 0)
+		return err;
+	/* 
+	 * We have to store the fp registers to current->thread.fp_regs
+	 * to merge them with the emulated registers.
+	 */
+	save_fp_regs(&current->thread.fp_regs);
+	return __copy_to_user(&sregs->fpregs, &current->thread.fp_regs, 
+			      sizeof(s390_fp_regs));
 }
 
 /* Returns positive number on error */
 static int restore_sigregs(struct pt_regs *regs,_sigregs *sregs)
 {
 	int err;
-	s390_fp_regs fpregs;
-	psw_t saved_psw=regs->psw;
-	err=__copy_from_user(regs,&sregs->regs,sizeof(_s390_regs_common));
-	if(!err)
-	{
+
+	err = __copy_from_user(regs, &sregs->regs, sizeof(_s390_regs_common));
+	regs->psw.mask = PSW_USER_BITS | (regs->psw.mask & PSW_MASK_CC);
+	regs->psw.addr |= PSW_ADDR_AMODE31;
+	if (err)
+		return err;
+
+	err = __copy_from_user(&current->thread.fp_regs, &sregs->fpregs,
+			       sizeof(s390_fp_regs));
+	current->thread.fp_regs.fpc &= FPC_VALID_MASK;
+	if (err)
+		return err;
+
+	restore_fp_regs(&current->thread.fp_regs);
 	regs->trap = -1;	/* disable syscall checks */
-		regs->psw.mask=(saved_psw.mask&~PSW_MASK_DEBUGCHANGE)|
-		(regs->psw.mask&PSW_MASK_DEBUGCHANGE);
-		regs->psw.addr=(saved_psw.addr&~PSW_ADDR_DEBUGCHANGE)|
-		(regs->psw.addr&PSW_ADDR_DEBUGCHANGE);
-		err=__copy_from_user(&fpregs,&sregs->fpregs,sizeof(fpregs));
-		if(!err)
-			restore_fp_regs(&fpregs);
-	}
-	return(err);
+	return 0;
 }
 
 asmlinkage long sys_sigreturn(struct pt_regs *regs)
@@ -191,10 +194,10 @@ asmlinkage long sys_sigreturn(struct pt_regs *regs)
 		goto badframe;
 
 	sigdelsetmask(&set, ~_BLOCKABLE);
-	spin_lock_irq(&current->sigmask_lock);
+	spin_lock_irq(&current->sig->siglock);
 	current->blocked = set;
 	recalc_sigpending();
-	spin_unlock_irq(&current->sigmask_lock);
+	spin_unlock_irq(&current->sig->siglock);
 
 	if (restore_sigregs(regs, &frame->sregs))
 		goto badframe;
@@ -217,10 +220,10 @@ asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
 		goto badframe;
 
 	sigdelsetmask(&set, ~_BLOCKABLE);
-	spin_lock_irq(&current->sigmask_lock);
+	spin_lock_irq(&current->sig->siglock);
 	current->blocked = set;
 	recalc_sigpending();
-	spin_unlock_irq(&current->sigmask_lock);
+	spin_unlock_irq(&current->sig->siglock);
 
 	if (restore_sigregs(regs, &frame->uc.uc_mcontext))
 		goto badframe;
@@ -295,9 +298,9 @@ static void setup_frame(int sig, struct k_sigaction *ka,
 	/* Set up to return from userspace.  If provided, use a stub
 	   already in userspace.  */
 	if (ka->sa.sa_flags & SA_RESTORER) {
-                regs->gprs[14] = FIX_PSW(ka->sa.sa_restorer);
+                regs->gprs[14] = (__u32) ka->sa.sa_restorer | PSW_ADDR_AMODE31;
 	} else {
-                regs->gprs[14] = FIX_PSW(frame->retcode);
+                regs->gprs[14] = (__u32) frame->retcode | PSW_ADDR_AMODE31;
 		if (__put_user(S390_SYSCALL_OPCODE | __NR_sigreturn, 
 	                       (u16 *)(frame->retcode)))
 			goto give_sigsegv;
@@ -308,12 +311,12 @@ static void setup_frame(int sig, struct k_sigaction *ka,
 		goto give_sigsegv;
 
 	/* Set up registers for signal handler */
-	regs->gprs[15] = (addr_t)frame;
-	regs->psw.addr = FIX_PSW(ka->sa.sa_handler);
-	regs->psw.mask = _USER_PSW_MASK;
+	regs->gprs[15] = (__u32) frame;
+	regs->psw.addr = (__u32) ka->sa.sa_handler | PSW_ADDR_AMODE31;
+	regs->psw.mask = PSW_USER_BITS;
 
 	regs->gprs[2] = map_signal(sig);
-	regs->gprs[3] = (addr_t)&frame->sc;
+	regs->gprs[3] = (__u32) &frame->sc;
 
 	/* We forgot to include these in the sigcontext.
 	   To avoid breaking binary compatibility, they are passed as args. */
@@ -353,9 +356,9 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	/* Set up to return from userspace.  If provided, use a stub
 	   already in userspace.  */
 	if (ka->sa.sa_flags & SA_RESTORER) {
-                regs->gprs[14] = FIX_PSW(ka->sa.sa_restorer);
+                regs->gprs[14] = (__u32) ka->sa.sa_restorer | PSW_ADDR_AMODE31;
 	} else {
-                regs->gprs[14] = FIX_PSW(frame->retcode);
+                regs->gprs[14] = (__u32) frame->retcode | PSW_ADDR_AMODE31;
 		err |= __put_user(S390_SYSCALL_OPCODE | __NR_rt_sigreturn, 
 	                          (u16 *)(frame->retcode));
 	}
@@ -365,13 +368,13 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 		goto give_sigsegv;
 
 	/* Set up registers for signal handler */
-	regs->gprs[15] = (addr_t)frame;
-	regs->psw.addr = FIX_PSW(ka->sa.sa_handler);
-	regs->psw.mask = _USER_PSW_MASK;
+	regs->gprs[15] = (__u32) frame;
+	regs->psw.addr = (__u32) ka->sa.sa_handler | PSW_ADDR_AMODE31;
+	regs->psw.mask = PSW_USER_BITS;
 
 	regs->gprs[2] = map_signal(sig);
-	regs->gprs[3] = (addr_t)&frame->info;
-	regs->gprs[4] = (addr_t)&frame->uc;
+	regs->gprs[3] = (__u32) &frame->info;
+	regs->gprs[4] = (__u32) &frame->uc;
 	return;
 
 give_sigsegv:
@@ -420,11 +423,11 @@ handle_signal(unsigned long sig, siginfo_t *info, sigset_t *oldset,
 		ka->sa.sa_handler = SIG_DFL;
 
 	if (!(ka->sa.sa_flags & SA_NODEFER)) {
-		spin_lock_irq(&current->sigmask_lock);
+		spin_lock_irq(&current->sig->siglock);
 		sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
 		sigaddset(&current->blocked,sig);
 		recalc_sigpending();
-		spin_unlock_irq(&current->sigmask_lock);
+		spin_unlock_irq(&current->sig->siglock);
 	}
 }
 

arch/s390/kernel/time.c

@@ -27,6 +27,7 @@
 #include <asm/uaccess.h>
 #include <asm/delay.h>
 #include <asm/s390_ext.h>
+#include <asm/div64.h>
 
 #include <linux/timex.h>
 #include <linux/config.h>
@@ -37,55 +38,39 @@
 #define USECS_PER_JIFFY     ((unsigned long) 1000000/HZ)
 #define CLK_TICKS_PER_JIFFY ((unsigned long) USECS_PER_JIFFY << 12)
 
+/*
+ * Create a small time difference between the timer interrupts
+ * on the different cpus to avoid lock contention.
+ */
+#define CPU_DEVIATION       (smp_processor_id() << 12)
+
 #define TICK_SIZE tick
 
 u64 jiffies_64;
 
 static ext_int_info_t ext_int_info_timer;
+static uint64_t xtime_cc;
 static uint64_t init_timer_cc;
 
 extern rwlock_t xtime_lock;
 extern unsigned long wall_jiffies;
 
-void tod_to_timeval(__u64 todval, struct timeval *xtime)
+void tod_to_timeval(__u64 todval, struct timespec *xtime)
 {
-        const int high_bit = 0x80000000L;
-        const int c_f4240 = 0xf4240L;
-        const int c_7a120 = 0x7a120;
-	/* We have to divide the 64 bit value todval by 4096
-	 * (because the 2^12 bit is the one that changes every 
-         * microsecond) and then split it into seconds and
-         * microseconds. A value of max (2^52-1) divided by
-         * the value 0xF4240 can yield a max result of approx
-         * (2^32.068). Thats to big to fit into a signed int
-	 *   ... hacking time!
-         */
-	asm volatile ("L     2,%1\n\t"
-		      "LR    3,2\n\t"
-		      "SRL   2,12\n\t"
-		      "SLL   3,20\n\t"
-		      "L     4,%O1+4(%R1)\n\t"
-		      "SRL   4,12\n\t"
-		      "OR    3,4\n\t"  /* now R2/R3 contain (todval >> 12) */
-		      "SR    4,4\n\t"
-		      "CL    2,%2\n\t"
-		      "JL    .+12\n\t"
-		      "S     2,%2\n\t"
-		      "L     4,%3\n\t"
-                      "D     2,%4\n\t"
-		      "OR    3,4\n\t"
-		      "ST    2,%O0+4(%R0)\n\t"
-		      "ST    3,%0"
-		      : "=m" (*xtime) : "m" (todval),
-		        "m" (c_7a120), "m" (high_bit), "m" (c_f4240)
-		      : "cc", "memory", "2", "3", "4" );
+	unsigned long long sec;
+
+	sec = todval >> 12;
+	do_div(sec, 1000000);
+	xtime->tv_sec = sec;
+	todval -= (sec * 1000000) << 12;
+	xtime->tv_nsec = ((todval * 1000) >> 12);
 }
 
 static inline unsigned long do_gettimeoffset(void) 
 {
 	__u64 now;
 
-	asm ("STCK 0(%0)" : : "a" (&now) : "memory", "cc");
+	asm volatile ("STCK 0(%0)" : : "a" (&now) : "memory", "cc");
         now = (now - init_timer_cc) >> 12;
 	/* We require the offset from the latest update of xtime */
 	now -= (__u64) wall_jiffies*USECS_PER_JIFFY;
@@ -102,7 +87,7 @@ void do_gettimeofday(struct timeval *tv)
 
 	read_lock_irqsave(&xtime_lock, flags);
 	sec = xtime.tv_sec;
-	usec = xtime.tv_usec + do_gettimeoffset();
+	usec = xtime.tv_nsec / 1000 + do_gettimeoffset();
 	read_unlock_irqrestore(&xtime_lock, flags);
 
 	while (usec >= 1000000) {
@@ -118,7 +103,7 @@ void do_settimeofday(struct timeval *tv)
 {
 
 	write_lock_irq(&xtime_lock);
-	/* This is revolting. We need to set the xtime.tv_usec
+	/* This is revolting. We need to set the xtime.tv_nsec
 	 * correctly. However, the value in this location is
 	 * is value at the last tick.
 	 * Discover what correction gettimeofday
@@ -131,7 +116,8 @@ void do_settimeofday(struct timeval *tv)
 		tv->tv_sec--;
 	}
 
-	xtime = *tv;
+	xtime.tv_sec = tv->tv_sec;
+	xtime.tv_nsec = tv->tv_usec * 1000;
 	time_adjust = 0;		/* stop active adjtime() */
 	time_status |= STA_UNSYNC;
 	time_maxerror = NTP_PHASE_LIMIT;
@@ -139,58 +125,90 @@ void do_settimeofday(struct timeval *tv)
 	write_unlock_irq(&xtime_lock);
 }
 
+static inline __u32 div64_32(__u64 dividend, __u32 divisor)
+{
+	register_pair rp;
+
+	rp.pair = dividend;
+	asm ("dr %0,%1" : "+d" (rp) : "d" (divisor));
+	return rp.subreg.odd;
+}
+
 /*
  * timer_interrupt() needs to keep up the real-time clock,
  * as well as call the "do_timer()" routine every clocktick
  */
-
-#ifdef CONFIG_SMP
-extern __u16 boot_cpu_addr;
-#endif
-
 static void do_comparator_interrupt(struct pt_regs *regs, __u16 error_code)
 {
 	int cpu = smp_processor_id();
+	__u64 tmp;
+	__u32 ticks;
+
+	/* Calculate how many ticks have passed. */
+	asm volatile ("STCK 0(%0)" : : "a" (&tmp) : "memory", "cc");
+	tmp = tmp - S390_lowcore.jiffy_timer;
+	if (tmp >= 2*CLK_TICKS_PER_JIFFY) {  /* more than one tick ? */
+		ticks = div64_32(tmp >> 1, CLK_TICKS_PER_JIFFY >> 1);
+		S390_lowcore.jiffy_timer +=
+			CLK_TICKS_PER_JIFFY * (__u64) ticks;
+	} else {
+		ticks = 1;
+		S390_lowcore.jiffy_timer += CLK_TICKS_PER_JIFFY;
+	}
 
-	irq_enter(cpu, 0);
+	/* set clock comparator for next tick */
+	tmp = S390_lowcore.jiffy_timer + CLK_TICKS_PER_JIFFY + CPU_DEVIATION;
+        asm volatile ("SCKC %0" : : "m" (tmp));
 
-	/*
-	 * set clock comparator for next tick
-	 */
-        S390_lowcore.jiffy_timer += CLK_TICKS_PER_JIFFY;
-        asm volatile ("SCKC %0" : : "m" (S390_lowcore.jiffy_timer));
+	irq_enter();
 
 #ifdef CONFIG_SMP
-	if (S390_lowcore.cpu_data.cpu_addr == boot_cpu_addr)
+	/*
+	 * Do not rely on the boot cpu to do the calls to do_timer.
+	 * Spread it over all cpus instead.
+	 */
 	write_lock(&xtime_lock);
-
-	update_process_times(user_mode(regs));
-
-	if (S390_lowcore.cpu_data.cpu_addr == boot_cpu_addr) {
+	if (S390_lowcore.jiffy_timer > xtime_cc) {
+		__u32 xticks;
+
+		tmp = S390_lowcore.jiffy_timer - xtime_cc;
+		if (tmp >= 2*CLK_TICKS_PER_JIFFY) {
+			xticks = div64_32(tmp >> 1, CLK_TICKS_PER_JIFFY >> 1);
+			xtime_cc += (__u64) xticks * CLK_TICKS_PER_JIFFY;
+		} else {
+			xticks = 1;
+			xtime_cc += CLK_TICKS_PER_JIFFY;
+		}
+		while (xticks--)
 			do_timer(regs);
-		write_unlock(&xtime_lock);
 	}
+	write_unlock(&xtime_lock);
+	while (ticks--)
+		update_process_times(user_mode(regs));
 #else
+	while (ticks--)
 		do_timer(regs);
 #endif
 
-	irq_exit(cpu, 0);
+	irq_exit();
 }
 
 /*
- * Start the clock comparator on the current CPU
+ * Start the clock comparator on the current CPU.
  */
 void init_cpu_timer(void)
 {
 	unsigned long cr0;
+	__u64 timer;
 
         /* allow clock comparator timer interrupt */
         asm volatile ("STCTL 0,0,%0" : "=m" (cr0) : : "memory");
         cr0 |= 0x800;
         asm volatile ("LCTL 0,0,%0" : : "m" (cr0) : "memory");
-	S390_lowcore.jiffy_timer = (__u64) jiffies * CLK_TICKS_PER_JIFFY;
-	S390_lowcore.jiffy_timer += init_timer_cc + CLK_TICKS_PER_JIFFY;
-	asm volatile ("SCKC %0" : : "m" (S390_lowcore.jiffy_timer));
+	timer = init_timer_cc + jiffies_64 * CLK_TICKS_PER_JIFFY;
+	S390_lowcore.jiffy_timer = timer;
+	timer += CLK_TICKS_PER_JIFFY + CPU_DEVIATION;
+	asm volatile ("SCKC %0" : : "m" (timer));
 }
 
 /*
@@ -222,6 +240,7 @@ void __init time_init(void)
         }
 
 	/* set xtime */
+	xtime_cc = init_timer_cc;
 	set_time_cc = init_timer_cc - 0x8126d60e46000000LL +
 		(0x3c26700LL*1000000*4096);
         tod_to_timeval(set_time_cc, &xtime);

arch/s390/kernel/traps.c

@@ -116,22 +116,22 @@ void show_trace(unsigned long * stack)
 		stack = (unsigned long*)&stack;
 
 	printk("Call Trace: ");
-	low_addr = ((unsigned long) stack) & PSW_ADDR_MASK;
+	low_addr = ((unsigned long) stack) & PSW_ADDR_INSN;
 	high_addr = (low_addr & (-THREAD_SIZE)) + THREAD_SIZE;
 	/* Skip the first frame (biased stack) */
-	backchain = *((unsigned long *) low_addr) & PSW_ADDR_MASK;
+	backchain = *((unsigned long *) low_addr) & PSW_ADDR_INSN;
 	/* Print up to 8 lines */
 	for (i = 0; i < 8; i++) {
 		if (backchain < low_addr || backchain >= high_addr)
 			break;
-		ret_addr = *((unsigned long *) (backchain+56)) & PSW_ADDR_MASK;
+		ret_addr = *((unsigned long *) (backchain+56)) & PSW_ADDR_INSN;
 		if (!kernel_text_address(ret_addr))
 			break;
 		if (i && ((i % 6) == 0))
 			printk("\n   ");
 		printk("[<%08lx>] ", ret_addr);
 		low_addr = backchain;
-		backchain = *((unsigned long *) backchain) & PSW_ADDR_MASK;
+		backchain = *((unsigned long *) backchain) & PSW_ADDR_INSN;
 	}
 	printk("\n");
 }
@@ -170,13 +170,21 @@ void show_stack(unsigned long *sp)
 	show_trace(sp);
 }
 
+/*
+ * The architecture-independent dump_stack generator
+ */
+void dump_stack(void)
+{
+	show_stack(0);
+}
+
 void show_registers(struct pt_regs *regs)
 {
 	mm_segment_t old_fs;
 	char *mode;
 	int i;
 
-	mode = (regs->psw.mask & PSW_PROBLEM_STATE) ? "User" : "Krnl";
+	mode = (regs->psw.mask & PSW_MASK_PSTATE) ? "User" : "Krnl";
 	printk("%s PSW : %08lx %08lx\n",
 	       mode, (unsigned long) regs->psw.mask,
 	       (unsigned long) regs->psw.addr);
@@ -202,7 +210,7 @@ void show_registers(struct pt_regs *regs)
 	 * time of the fault.
 	 */
 	old_fs = get_fs();
-	if (regs->psw.mask & PSW_PROBLEM_STATE)
+	if (regs->psw.mask & PSW_MASK_PSTATE)
 		set_fs(USER_DS);
 	else
 		set_fs(KERNEL_DS);
@@ -279,10 +287,10 @@ static void inline do_trap(long interruption_code, int signr, char *str,
 	 * We got all needed information from the lowcore and can
 	 * now safely switch on interrupts.
 	 */
-        if (regs->psw.mask & PSW_PROBLEM_STATE)
+        if (regs->psw.mask & PSW_MASK_PSTATE)
 		local_irq_enable();
 
-        if (regs->psw.mask & PSW_PROBLEM_STATE) {
+        if (regs->psw.mask & PSW_MASK_PSTATE) {
                 struct task_struct *tsk = current;
 
                 tsk->thread.trap_no = interruption_code & 0xffff;
@@ -314,12 +322,12 @@ static void inline do_trap(long interruption_code, int signr, char *str,
 
 static inline void *get_check_address(struct pt_regs *regs)
 {
-	return (void *) ADDR_BITS_REMOVE(regs->psw.addr-S390_lowcore.pgm_ilc);
+	return (void *)((regs->psw.addr-S390_lowcore.pgm_ilc) & PSW_ADDR_INSN);
 }
 
 int do_debugger_trap(struct pt_regs *regs,int signal)
 {
-	if(regs->psw.mask&PSW_PROBLEM_STATE)
+	if(regs->psw.mask&PSW_MASK_PSTATE)
 	{
 		if(current->ptrace & PT_PTRACED)
 			force_sig(signal,current);
@@ -415,10 +423,10 @@ asmlinkage void illegal_op(struct pt_regs * regs, long interruption_code)
 	 * We got all needed information from the lowcore and can
 	 * now safely switch on interrupts.
 	 */
-	if (regs->psw.mask & PSW_PROBLEM_STATE)
+	if (regs->psw.mask & PSW_MASK_PSTATE)
 		local_irq_enable();
 
-	if (regs->psw.mask & PSW_PROBLEM_STATE)
+	if (regs->psw.mask & PSW_MASK_PSTATE)
 		get_user(*((__u16 *) opcode), location);
 	else
 		*((__u16 *)opcode)=*((__u16 *)location);
@@ -428,7 +436,7 @@ asmlinkage void illegal_op(struct pt_regs * regs, long interruption_code)
 			signal = SIGILL;
 	}
 #ifdef CONFIG_MATHEMU
-        else if (regs->psw.mask & PSW_PROBLEM_STATE)
+        else if (regs->psw.mask & PSW_MASK_PSTATE)
 	{
 		if (opcode[0] == 0xb3) {
 			get_user(*((__u16 *) (opcode+2)), location+1);
@@ -476,10 +484,10 @@ specification_exception(struct pt_regs * regs, long interruption_code)
 	 * We got all needed information from the lowcore and can
 	 * now safely switch on interrupts.
 	 */
-	if (regs->psw.mask & PSW_PROBLEM_STATE)
+	if (regs->psw.mask & PSW_MASK_PSTATE)
 		local_irq_enable();
 		
-        if (regs->psw.mask & PSW_PROBLEM_STATE) {
+        if (regs->psw.mask & PSW_MASK_PSTATE) {
 		get_user(*((__u16 *) opcode), location);
 		switch (opcode[0]) {
 		case 0x28: /* LDR Rx,Ry   */
@@ -539,7 +547,7 @@ asmlinkage void data_exception(struct pt_regs * regs, long interruption_code)
 	 * We got all needed information from the lowcore and can
 	 * now safely switch on interrupts.
 	 */
-	if (regs->psw.mask & PSW_PROBLEM_STATE)
+	if (regs->psw.mask & PSW_MASK_PSTATE)
 		local_irq_enable();
 
 	if (MACHINE_HAS_IEEE)
@@ -547,7 +555,7 @@ asmlinkage void data_exception(struct pt_regs * regs, long interruption_code)
 				  : "=m" (current->thread.fp_regs.fpc));
 
 #ifdef CONFIG_MATHEMU
-        else if (regs->psw.mask & PSW_PROBLEM_STATE) {
+        else if (regs->psw.mask & PSW_MASK_PSTATE) {
         	__u8 opcode[6];
 		get_user(*((__u16 *) opcode), location);
 		switch (opcode[0]) {
@@ -671,21 +679,19 @@ void __init trap_init(void)
 
 void handle_per_exception(struct pt_regs *regs)
 {
-	if(regs->psw.mask&PSW_PROBLEM_STATE)
-	{
+	if (regs->psw.mask & PSW_MASK_PSTATE) {
 		per_struct *per_info=&current->thread.per_info;
 		per_info->lowcore.words.perc_atmid=S390_lowcore.per_perc_atmid;
 		per_info->lowcore.words.address=S390_lowcore.per_address;
 		per_info->lowcore.words.access_id=S390_lowcore.per_access_id;
 	}
-	if(do_debugger_trap(regs,SIGTRAP))
-	{
+	if (do_debugger_trap(regs,SIGTRAP)) {
 		/* I've seen this possibly a task structure being reused ? */
 		printk("Spurious per exception detected\n");
 		printk("switching off per tracing for this task.\n");
 		show_regs(regs);
 		/* Hopefully switching off per tracing will help us survive */
-		regs->psw.mask &= ~PSW_PER_MASK;
+		regs->psw.mask &= ~PSW_MASK_PER;
 	}
 }
 

arch/s390/lib/Makefile

@@ -6,8 +6,7 @@ L_TARGET = lib.a
 
 EXTRA_AFLAGS := -traditional
 
-obj-y = checksum.o delay.o memset.o misaligned.o strcmp.o strncpy.o uaccess.o
-export-objs += misaligned.o
+obj-y = delay.o memset.o strcmp.o strncpy.o uaccess.o
 
 include $(TOPDIR)/Rules.make
 

arch/s390/lib/checksum.c

-/*
- *  arch/s390/lib/checksum.c
- *    S390 fast network checksum routines
- *
- *  S390 version
- *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
- *    Author(s): Ulrich Hild        (first version),
- *               Martin Schwidefsky (schwidefsky@de.ibm.com),
- *               Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com),
- *
- * This file contains network checksum routines
- */
- 
-#include <linux/string.h>
-#include <linux/types.h>
-#include <asm/uaccess.h>
-#include <asm/byteorder.h>
-#include <asm/checksum.h>
-
-/*
- * computes a partial checksum, e.g. for TCP/UDP fragments
- */
-unsigned int
-csum_partial (const unsigned char *buff, int len, unsigned int sum)
-{
-	register_pair rp;
-	  /*
-	   * Experiments with ethernet and slip connections show that buff
-	   * is aligned on either a 2-byte or 4-byte boundary.
-	   */
-	rp.subreg.even = (unsigned long) buff;
-	rp.subreg.odd = (unsigned long) len;
-        __asm__ __volatile__ (
-                "0:  cksm %0,%1\n"    /* do checksum on longs */
-                "    jo   0b\n"
-                : "+&d" (sum), "+&a" (rp) : : "cc" );
-        return sum;
-}
-
-/*
- *	Fold a partial checksum without adding pseudo headers
- */
-unsigned short csum_fold(unsigned int sum)
-{
-	register_pair rp;
-
-	__asm__ __volatile__ (
-		"    slr  %N1,%N1\n" /* %0 = H L */
-		"    lr   %1,%0\n"   /* %0 = H L, %1 = H L 0 0 */
-		"    srdl %1,16\n"   /* %0 = H L, %1 = 0 H L 0 */
-		"    alr  %1,%N1\n"  /* %0 = H L, %1 = L H L 0 */
-		"    alr  %0,%1\n"   /* %0 = H+L+C L+H */
-		"    srl  %0,16\n"   /* %0 = H+L+C */
-		: "+&d" (sum), "=d" (rp) : : "cc" );
-	return ((unsigned short) ~sum);
-}
-

arch/s390/lib/misaligned.c

-/*
- *  arch/s390/lib/misaligned.c
- *    S390 misalignment panic stubs
- *
- *  S390 version
- *    Copyright (C) 2001 IBM Deutschland Entwicklung GmbH, IBM Corporation
- *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com).
- *
- * xchg wants to panic if the pointer is not aligned. To avoid multiplying
- * the panic message over and over again, the panic is done in the helper
- * functions __misaligned_u32 and __misaligned_u16.
- */
-
-#include <linux/module.h> 
-#include <linux/kernel.h>
-
-void __misaligned_u16(void)
-{
-	panic("misaligned (__u16 *) in __xchg\n");
-}
-
-void __misaligned_u32(void)
-{
-	panic("misaligned (__u32 *) in __xchg\n");
-}
-
-EXPORT_SYMBOL(__misaligned_u16);
-EXPORT_SYMBOL(__misaligned_u32);
-

arch/s390/mm/extable.c

@@ -48,7 +48,7 @@ search_exception_table(unsigned long addr)
         addr &= 0x7fffffff;  /* remove amode bit from address */
 	/* There is only the kernel to search.  */
 	ret = search_one_table(__start___ex_table, __stop___ex_table-1, addr);
-	if (ret) ret = FIX_PSW(ret);
+	if (ret) ret = ret | PSW_ADDR_AMODE31;
 	return ret;
 #else
 	unsigned long flags;
@@ -63,7 +63,7 @@ search_exception_table(unsigned long addr)
 		ret = search_one_table(mp->ex_table_start,
 				       mp->ex_table_end - 1, addr);
 		if (ret) {
-			ret = FIX_PSW(ret);
+			ret = ret | PSW_ADDR_AMODE31;
 			break;
 		}
 	}

arch/s390/mm/fault.c

@@ -46,7 +46,6 @@ extern spinlock_t timerlist_lock;
  */
 void bust_spinlocks(int yes)
 {
-	spin_lock_init(&timerlist_lock);
 	if (yes) {
 		oops_in_progress = 1;
 	} else {
@@ -167,7 +166,7 @@ extern inline void do_exception(struct pt_regs *regs, unsigned long error_code)
 
 		/* Low-address protection hit in kernel mode means 
 		   NULL pointer write access in kernel mode.  */
- 		if (!(regs->psw.mask & PSW_PROBLEM_STATE)) {
+ 		if (!(regs->psw.mask & PSW_MASK_PSTATE)) {
 			address = 0;
 			user_address = 0;
 			goto no_context;
@@ -234,16 +233,18 @@ extern inline void do_exception(struct pt_regs *regs, unsigned long error_code)
 	 * the fault.
 	 */
 	switch (handle_mm_fault(mm, vma, address, error_code == 4)) {
-	case 1:
+	case VM_FAULT_MINOR:
 		tsk->min_flt++;
 		break;
-	case 2:
+	case VM_FAULT_MAJOR:
 		tsk->maj_flt++;
 		break;
-	case 0:
+	case VM_FAULT_SIGBUS:
 		goto do_sigbus;
-	default:
+	case VM_FAULT_OOM:
 		goto out_of_memory;
+	default:
+		BUG();
 	}
 
         up_read(&mm->mmap_sem);
@@ -257,7 +258,7 @@ extern inline void do_exception(struct pt_regs *regs, unsigned long error_code)
         up_read(&mm->mmap_sem);
 
         /* User mode accesses just cause a SIGSEGV */
-        if (regs->psw.mask & PSW_PROBLEM_STATE) {
+        if (regs->psw.mask & PSW_MASK_PSTATE) {
                 tsk->thread.prot_addr = address;
                 tsk->thread.trap_no = error_code;
 		force_sigsegv(regs, error_code, si_code, address);
@@ -297,7 +298,7 @@ extern inline void do_exception(struct pt_regs *regs, unsigned long error_code)
 		goto survive;
 	}
 	printk("VM: killing process %s\n", tsk->comm);
-	if (regs->psw.mask & PSW_PROBLEM_STATE)
+	if (regs->psw.mask & PSW_MASK_PSTATE)
 		do_exit(SIGKILL);
 	goto no_context;
 
@@ -313,7 +314,7 @@ extern inline void do_exception(struct pt_regs *regs, unsigned long error_code)
 	force_sig(SIGBUS, tsk);
 
 	/* Kernel mode? Handle exceptions or die */
-	if (!(regs->psw.mask & PSW_PROBLEM_STATE))
+	if (!(regs->psw.mask & PSW_MASK_PSTATE))
 		goto no_context;
 }
 
@@ -392,7 +393,7 @@ do_pseudo_page_fault(struct pt_regs *regs, unsigned long error_code)
                 spin_unlock(&pseudo_wait_spinlock);
         } else {
                 /* Pseudo page faults in kernel mode is a bad idea */
-                if (!(regs->psw.mask & PSW_PROBLEM_STATE)) {
+                if (!(regs->psw.mask & PSW_MASK_PSTATE)) {
                         /*
 			 * VM presents pseudo page faults if the interrupted
 			 * state was not disabled for interrupts. So we can
@@ -527,7 +528,7 @@ pfault_interrupt(struct pt_regs *regs, __u16 error_code)
 	 * We got all needed information from the lowcore and can
 	 * now safely switch on interrupts.
 	 */
-	if (regs->psw.mask & PSW_PROBLEM_STATE)
+	if (regs->psw.mask & PSW_MASK_PSTATE)
 		local_irq_enable();
 
 	if (subcode & 0x0080) {

arch/s390/vmlinux-shared.lds

-/* ld script to make s390 Linux kernel
- * Written by Martin Schwidefsky (schwidefsky@de.ibm.com)
- */
-OUTPUT_FORMAT("elf32-s390", "elf32-s390", "elf32-s390")
-OUTPUT_ARCH(s390)
-ENTRY(_start)
-jiffies = jiffies_64 + 4;
-SECTIONS
-{
-  . = 0x00000000;
-  _text = .;			/* Text and read-only data */
-  .text : {
-	*(.text)
-	*(.fixup)
-	*(.gnu.warning)
-	} = 0x0700
-
-  _etext = .;			/* End of text section */
-
-  .rodata : { *(.rodata) }
-  .kstrtab : { *(.kstrtab) }
-
-  . = ALIGN(16);		/* Exception table */
-  __start___ex_table = .;
-  __ex_table : { *(__ex_table) }
-  __stop___ex_table = .;
-
-  __start___ksymtab = .;	/* Kernel symbol table */
-  __ksymtab : { *(__ksymtab) }
-  __stop___ksymtab = .;
-
-  . = ALIGN(1048576);		/* VM shared segments are 1MB aligned */
-
-  _eshared = .;			/* End of shareable data */
-
-  .data : {			/* Data */
-	*(.data)
-	CONSTRUCTORS
-	}
-
-  _edata = .;			/* End of data section */
-
-  . = ALIGN(8192);		/* init_task */
-  .data.init_task : { *(.data.init_task) }
-
-  . = ALIGN(4096);		/* Init code and data */
-  __init_begin = .;
-  .text.init : { *(.text.init) }
-  .data.init : { *(.data.init) }
-  . = ALIGN(256);
-  __setup_start = .;
-  .setup.init : { *(.setup.init) }
-  __setup_end = .;
-  __initcall_start = .;
-  .initcall.init : {
-	*(.initcall1.init) 
-	*(.initcall2.init) 
-	*(.initcall3.init) 
-	*(.initcall4.init) 
-	*(.initcall5.init) 
-	*(.initcall6.init) 
-	*(.initcall7.init)
-  }
-  __initcall_end = .;
-  . = ALIGN(256);
-  __per_cpu_start = .;
-  .date.percpu  : { *(.data.percpu) }
-  __per_cpu_end = .;
-  . = ALIGN(4096);
-  __init_end = .;
-
-  . = ALIGN(32);
-  .data.cacheline_aligned : { *(.data.cacheline_aligned) }
-
-  . = ALIGN(4096);
-  .data.page_aligned : { *(.data.idt) }
-
-
-  __bss_start = .;		/* BSS */
-  .bss : {
-	*(.bss)
-	}
-  _end = . ;
-
-  /* Stabs debugging sections.  */
-  .stab 0 : { *(.stab) }
-  .stabstr 0 : { *(.stabstr) }
-  .stab.excl 0 : { *(.stab.excl) }
-  .stab.exclstr 0 : { *(.stab.exclstr) }
-  .stab.index 0 : { *(.stab.index) }
-  .stab.indexstr 0 : { *(.stab.indexstr) }
-  .comment 0 : { *(.comment) }
-}

arch/s390/vmlinux.lds

-/* ld script to make s390 Linux kernel
- * Written by Martin Schwidefsky (schwidefsky@de.ibm.com)
- */
-OUTPUT_FORMAT("elf32-s390", "elf32-s390", "elf32-s390")
-OUTPUT_ARCH(s390)
-ENTRY(_start)
-jiffies = jiffies_64 + 4;
-SECTIONS
-{
-  . = 0x00000000;
-  _text = .;			/* Text and read-only data */
-  .text : {
-	*(.text)
-	*(.fixup)
-	*(.gnu.warning)
-	} = 0x0700
-
-  _etext = .;			/* End of text section */
-
-  .rodata : { *(.rodata) *(.rodata.*) }
-  .kstrtab : { *(.kstrtab) }
-
-  . = ALIGN(16);		/* Exception table */
-  __start___ex_table = .;
-  __ex_table : { *(__ex_table) }
-  __stop___ex_table = .;
-
-  __start___ksymtab = .;	/* Kernel symbol table */
-  __ksymtab : { *(__ksymtab) }
-  __stop___ksymtab = .;
-
-  .data : {			/* Data */
-	*(.data)
-	CONSTRUCTORS
-	}
-
-  _edata = .;			/* End of data section */
-
-  . = ALIGN(8192);		/* init_task */
-  .data.init_task : { *(.data.init_task) }
-
-  . = ALIGN(4096);		/* Init code and data */
-  __init_begin = .;
-  .text.init : { *(.text.init) }
-  .data.init : { *(.data.init) }
-  . = ALIGN(256);
-  __setup_start = .;
-  .setup.init : { *(.setup.init) }
-  __setup_end = .;
-  __initcall_start = .;
-  .initcall.init : {
-	*(.initcall1.init) 
-	*(.initcall2.init) 
-	*(.initcall3.init) 
-	*(.initcall4.init) 
-	*(.initcall5.init) 
-	*(.initcall6.init) 
-	*(.initcall7.init)
-  }
-  __initcall_end = .;
-  . = ALIGN(256);
-  __per_cpu_start = .;
-  .date.percpu  : { *(.data.percpu) }
-  __per_cpu_end = .;
-  . = ALIGN(4096);
-  __init_end = .;
-
-  . = ALIGN(32);
-  .data.cacheline_aligned : { *(.data.cacheline_aligned) }
-
-  . = ALIGN(4096);
-  .data.page_aligned : { *(.data.idt) }
-
-  __bss_start = .;		/* BSS */
-  .bss : {
-	*(.bss)
-	}
-  _end = . ;
-
-  /* Stabs debugging sections.  */
-  .stab 0 : { *(.stab) }
-  .stabstr 0 : { *(.stabstr) }
-  .stab.excl 0 : { *(.stab.excl) }
-  .stab.exclstr 0 : { *(.stab.exclstr) }
-  .stab.index 0 : { *(.stab.index) }
-  .stab.indexstr 0 : { *(.stab.indexstr) }
-  .comment 0 : { *(.comment) }
-}

arch/s390/vmlinux.lds.S

-#include <linux/config.h>
+/* ld script to make s390 Linux kernel
+ * Written by Martin Schwidefsky (schwidefsky@de.ibm.com)
+ */
+OUTPUT_FORMAT("elf32-s390", "elf32-s390", "elf32-s390")
+OUTPUT_ARCH(s390)
+ENTRY(_start)
+jiffies = jiffies_64 + 4;
+SECTIONS
+{
+  . = 0x00000000;
+  _text = .;			/* Text and read-only data */
+  .text : {
+	*(.text)
+	*(.fixup)
+	*(.gnu.warning)
+	} = 0x0700
+
+  _etext = .;			/* End of text section */
+
+  .rodata : { *(.rodata) *(.rodata.*) }
+  .kstrtab : { *(.kstrtab) }
+
+  . = ALIGN(16);		/* Exception table */
+  __start___ex_table = .;
+  __ex_table : { *(__ex_table) }
+  __stop___ex_table = .;
+
+  __start___ksymtab = .;	/* Kernel symbol table */
+  __ksymtab : { *(__ksymtab) }
+  __stop___ksymtab = .;
 
 #ifdef CONFIG_SHARED_KERNEL
-#include "vmlinux-shared.lds"
-#else
-#include "vmlinux.lds"
+  . = ALIGN(1048576);		/* VM shared segments are 1MB aligned */
+
+  _eshared = .;			/* End of shareable data */
 #endif
+
+  .data : {			/* Data */
+	*(.data)
+	CONSTRUCTORS
+	}
+
+  _edata = .;			/* End of data section */
+
+  . = ALIGN(8192);		/* init_task */
+  .data.init_task : { *(.data.init_task) }
+
+  . = ALIGN(4096);		/* Init code and data */
+  __init_begin = .;
+  .text.init : { *(.text.init) }
+  .data.init : { *(.data.init) }
+  . = ALIGN(256);
+  __setup_start = .;
+  .setup.init : { *(.setup.init) }
+  __setup_end = .;
+  __initcall_start = .;
+  .initcall.init : {
+	*(.initcall1.init) 
+	*(.initcall2.init) 
+	*(.initcall3.init) 
+	*(.initcall4.init) 
+	*(.initcall5.init) 
+	*(.initcall6.init) 
+	*(.initcall7.init)
+  }
+  __initcall_end = .;
+  . = ALIGN(256);
+  __per_cpu_start = .;
+  .date.percpu  : { *(.data.percpu) }
+  __per_cpu_end = .;
+  . = ALIGN(4096);
+  __init_end = .;
+
+  . = ALIGN(32);
+  .data.cacheline_aligned : { *(.data.cacheline_aligned) }
+
+  . = ALIGN(4096);
+  .data.page_aligned : { *(.data.idt) }
+
+  __bss_start = .;		/* BSS */
+  .bss : {
+	*(.bss)
+	}
+  _end = . ;
+
+  /* Stabs debugging sections.  */
+  .stab 0 : { *(.stab) }
+  .stabstr 0 : { *(.stabstr) }
+  .stab.excl 0 : { *(.stab.excl) }
+  .stab.exclstr 0 : { *(.stab.exclstr) }
+  .stab.index 0 : { *(.stab.index) }
+  .stab.indexstr 0 : { *(.stab.indexstr) }
+  .comment 0 : { *(.comment) }
+}

arch/s390x/Config.help

@@ -159,25 +159,11 @@ CONFIG_IPL_TAPE
   Select "vm_reader" if you are running under VM/ESA and want
   to IPL the image from the emulated card reader.
 
-CONFIG_FAST_IRQ
-  Select this option in order to get the interrupts processed faster
-  on your S/390 or zSeries machine.  If selected, after an interrupt
-  is processed, the channel subsystem will be asked for other pending
-  interrupts which will also be processed before leaving the interrupt
-  context.  This speeds up the I/O a lot. Say "Y".
-
 CONFIG_MACHCHK_WARNING
   Select this option if you want the machine check handler on IBM S/390 or
   zSeries to process warning machine checks (e.g. on power failures). 
   If unsure, say "Y".
 
-CONFIG_CHSC
-  Select this option if you want the s390 common I/O layer to use information
-  obtained by channel subsystem calls. This will enable Linux to process link
-  failures and resource accessibility events. Moreover, if you have procfs
-  enabled, you'll be able to toggle chpids logically offline and online. Even
-  if you don't understand what this means, you should say "Y".
-
 CONFIG_S390_SUPPORT
   Select this option if you want to enable your system kernel to
   handle system-calls from ELF binaries for 31 bit ESA.  This option

arch/s390x/Makefile

@@ -26,7 +26,7 @@ HEAD := arch/s390x/kernel/head.o arch/s390x/kernel/init_task.o
 
 core-y		+= arch/s390x/mm/ arch/s390x/kernel/
 drivers-y	+= drivers/s390/
-libs-y		+= arch/s390/lib/
+libs-y		+= arch/s390x/lib/
 
 all: image listing
 

arch/s390x/config.in

@@ -17,31 +17,30 @@ define_bool CONFIG_ARCH_S390X y
 source init/Config.in
 
 mainmenu_option next_comment
+comment 'Base setup'
 comment 'Processor type and features'
 bool 'Symmetric multi-processing support' CONFIG_SMP
 bool 'Kernel support for 31 bit emulation' CONFIG_S390_SUPPORT
 if [ "$CONFIG_S390_SUPPORT" = "y" ]; then
   tristate 'Kernel support for 31 bit ELF binaries' CONFIG_BINFMT_ELF32 
 fi
-endmenu
 
-mainmenu_option next_comment
-comment 'Base setup'
-bool 'Fast IRQ handling' CONFIG_FAST_IRQ
+comment 'I/O subsystem configuration'
 bool 'Process warning machine checks' CONFIG_MACHCHK_WARNING
-bool 'Use chscs for Common I/O' CONFIG_CHSC
-  
 tristate 'QDIO support' CONFIG_QDIO
-  if [ "$CONFIG_QDIO" != "n" ]; then
+if [ "$CONFIG_QDIO" != "n" ]; then
   bool '   Performance statistics in /proc' CONFIG_QDIO_PERF_STATS
-  fi
+fi
 
+comment 'Misc'
+bool 'Preemptible Kernel' CONFIG_PREEMPT
 bool 'Builtin IPL record support' CONFIG_IPL
 if [ "$CONFIG_IPL" = "y" ]; then
   choice 'IPL method generated into head.S' \
           "tape                   CONFIG_IPL_TAPE \
            vm_reader              CONFIG_IPL_VM" tape
 fi
+
 define_bool CONFIG_KCORE_ELF y
 tristate 'Kernel support for ELF binaries' CONFIG_BINFMT_ELF
 tristate 'Kernel support for MISC binaries' CONFIG_BINFMT_MISC
@@ -71,7 +70,6 @@ source fs/Config.in
 mainmenu_option next_comment
 comment 'Kernel hacking'
 
-#bool 'Debug kmalloc/kfree' CONFIG_DEBUG_MALLOC
 #if [ "$CONFIG_CTC" = "y" ]; then
 #  bool 'Remote GDB kernel debugging' CONFIG_REMOTE_DEBUG
 #fi

arch/s390x/defconfig

@@ -30,6 +30,10 @@ CONFIG_MODULES=y
 # CONFIG_MODVERSIONS is not set
 CONFIG_KMOD=y
 
+#
+# Base setup
+#
+
 #
 # Processor type and features
 #
@@ -38,13 +42,16 @@ CONFIG_S390_SUPPORT=y
 CONFIG_BINFMT_ELF32=y
 
 #
-# Base setup
+# I/O subsystem configuration
 #
-CONFIG_FAST_IRQ=y
 CONFIG_MACHCHK_WARNING=y
-CONFIG_CHSC=y
-CONFIG_QDIO=m
+CONFIG_QDIO=y
 # CONFIG_QDIO_PERF_STATS is not set
+
+#
+# Misc
+#
+# CONFIG_PREEMPT is not set
 CONFIG_IPL=y
 # CONFIG_IPL_TAPE is not set
 CONFIG_IPL_VM=y
@@ -85,9 +92,6 @@ CONFIG_SCSI_LOGGING=y
 #
 # CONFIG_SCSI_7000FASST is not set
 # CONFIG_SCSI_ACARD is not set
-# CONFIG_SCSI_AHA152X is not set
-# CONFIG_SCSI_AHA1542 is not set
-# CONFIG_SCSI_AHA1740 is not set
 # CONFIG_SCSI_AIC7XXX is not set
 # CONFIG_SCSI_AIC7XXX_OLD is not set
 # CONFIG_SCSI_DPT_I2O is not set
@@ -115,7 +119,6 @@ CONFIG_SCSI_LOGGING=y
 # CONFIG_SCSI_PCI2220I is not set
 # CONFIG_SCSI_PSI240I is not set
 # CONFIG_SCSI_QLOGIC_FAS is not set
-# CONFIG_SCSI_SIM710 is not set
 # CONFIG_SCSI_SYM53C416 is not set
 # CONFIG_SCSI_T128 is not set
 # CONFIG_SCSI_U14_34F is not set
@@ -153,7 +156,7 @@ CONFIG_MD_RAID0=m
 CONFIG_MD_RAID1=m
 CONFIG_MD_RAID5=m
 # CONFIG_MD_MULTIPATH is not set
-CONFIG_BLK_DEV_LVM=m
+# CONFIG_BLK_DEV_LVM is not set
 
 #
 # Character device drivers
@@ -225,26 +228,23 @@ CONFIG_IP_MULTICAST=y
 # CONFIG_ARPD is not set
 # CONFIG_INET_ECN is not set
 # CONFIG_SYN_COOKIES is not set
-CONFIG_IPV6=m
-# CONFIG_KHTTPD is not set
-# CONFIG_ATM is not set
-# CONFIG_VLAN_8021Q is not set
+# CONFIG_IPV6 is not set
 
 #
+#    SCTP Configuration (EXPERIMENTAL)
 #
-#
+CONFIG_IPV6_SCTP__=y
+# CONFIG_IP_SCTP is not set
+# CONFIG_ATM is not set
+# CONFIG_VLAN_8021Q is not set
+# CONFIG_LLC is not set
 # CONFIG_IPX is not set
 # CONFIG_ATALK is not set
-
-#
-# Appletalk devices
-#
 # CONFIG_DEV_APPLETALK is not set
 # CONFIG_DECNET is not set
 # CONFIG_BRIDGE is not set
 # CONFIG_X25 is not set
 # CONFIG_LAPB is not set
-# CONFIG_LLC is not set
 # CONFIG_NET_DIVERT is not set
 # CONFIG_ECONET is not set
 # CONFIG_WAN_ROUTER is not set
@@ -299,7 +299,7 @@ CONFIG_RAMFS=y
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y
-CONFIG_DEVFS_MOUNT=y
+# CONFIG_DEVFS_MOUNT is not set
 # CONFIG_DEVFS_DEBUG is not set
 # CONFIG_DEVPTS_FS is not set
 # CONFIG_QNX4FS_FS is not set
@@ -311,6 +311,9 @@ CONFIG_EXT2_FS=y
 # CONFIG_UDF_RW is not set
 # CONFIG_UFS_FS is not set
 # CONFIG_UFS_FS_WRITE is not set
+# CONFIG_XFS_FS is not set
+# CONFIG_XFS_RT is not set
+# CONFIG_XFS_QUOTA is not set
 
 #
 # Network File Systems
@@ -320,12 +323,12 @@ CONFIG_EXT2_FS=y
 CONFIG_NFS_FS=y
 # CONFIG_NFS_V3 is not set
 # CONFIG_ROOT_NFS is not set
-# CONFIG_NFSD is not set
+CONFIG_NFSD=y
 # CONFIG_NFSD_V3 is not set
 # CONFIG_NFSD_TCP is not set
 CONFIG_SUNRPC=y
 CONFIG_LOCKD=y
-# CONFIG_EXPORTFS is not set
+CONFIG_EXPORTFS=y
 # CONFIG_SMB_FS is not set
 # CONFIG_NCP_FS is not set
 # CONFIG_NCPFS_PACKET_SIGNING is not set
@@ -362,6 +365,11 @@ CONFIG_IBM_PARTITION=y
 #
 CONFIG_MAGIC_SYSRQ=y
 
+#
+# Security options
+#
+CONFIG_SECURITY_CAPABILITIES=y
+
 #
 # Library routines
 #

arch/s390x/kernel/Makefile

@@ -5,12 +5,12 @@
 EXTRA_TARGETS	:= head.o init_task.o
 EXTRA_AFLAGS	:= -traditional
 
-export-objs	:= debug.o ebcdic.o irq.o s390_ext.o smp.o s390_ksyms.o \
+export-objs	:= debug.o ebcdic.o s390_ext.o smp.o s390_ksyms.o \
 		   exec32.o
 
-obj-y		:= entry.o bitmap.o traps.o time.o process.o irq.o \
+obj-y		:= entry.o bitmap.o traps.o time.o process.o \
 		   setup.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \
-		   semaphore.o s390fpu.o reipl.o s390_ext.o debug.o
+		   semaphore.o reipl.o s390_ext.o debug.o
 
 obj-$(CONFIG_MODULES)		+= s390_ksyms.o
 obj-$(CONFIG_SMP)		+= smp.o

arch/s390x/kernel/debug.c

@@ -21,6 +21,7 @@
 #include <asm/semaphore.h>
 
 #include <linux/module.h>
+#include <linux/init.h>
 
 #include <asm/debug.h>
 
@@ -146,7 +147,7 @@ static debug_info_t *debug_area_first = NULL;
 static debug_info_t *debug_area_last = NULL;
 DECLARE_MUTEX(debug_lock);
 
-static int initialized = 0;
+static int initialized;
 
 static struct file_operations debug_file_ops = {
 	read:    debug_output,
@@ -591,7 +592,7 @@ debug_info_t *debug_register
 
 	MOD_INC_USE_COUNT;
 	if (!initialized)
-		debug_init();
+		BUG();
 	down(&debug_lock);
 
         /* create new debug_info */
@@ -828,18 +829,16 @@ debug_entry_t *debug_sprintf_exception(debug_info_t* id,
  * - is called exactly once to initialize the debug feature
  */
 
-int debug_init(void)
+static int __init debug_init(void)
 {
 	int rc = 0;
 
 	down(&debug_lock);
-	if (!initialized) {
 #ifdef CONFIG_PROC_FS
 	debug_proc_root_entry = proc_mkdir(DEBUG_DIR_ROOT, NULL);
 #endif /* CONFIG_PROC_FS */
 	printk(KERN_INFO "debug: Initialization complete\n");
 	initialized = 1;
-	}
 	up(&debug_lock);
 
 	return rc;
@@ -1173,27 +1172,9 @@ int debug_sprintf_format_fn(debug_info_t * id, struct debug_view *view,
 }
 
 /*
- * init_module:
- */
-
-#ifdef MODULE
-int init_module(void)
-{
-	int rc = 0;
-#ifdef DEBUG
-	printk("debug_module_init: \n");
-#endif
-	rc = debug_init();
-	if (rc) 
-		printk(KERN_INFO "debug: an error occurred with debug_init\n");
-	return rc;
-}
-
-/*
- * cleanup_module:
+ * clean up module
  */
-
-void cleanup_module(void)
+void __exit debug_exit(void)
 {
 #ifdef DEBUG
 	printk("debug_cleanup_module: \n");
@@ -1204,7 +1185,12 @@ void cleanup_module(void)
 	return;
 }
 
-#endif			/* MODULE */
+/*
+ * module definitions
+ */
+core_initcall(debug_init);
+module_exit(debug_exit);
+MODULE_LICENSE("GPL");
 
 EXPORT_SYMBOL(debug_register);
 EXPORT_SYMBOL(debug_unregister); 

arch/s390x/kernel/entry.S

@@ -15,7 +15,6 @@
 #include <asm/cache.h>
 #include <asm/lowcore.h>
 #include <asm/errno.h>
-#include <asm/smp.h>
 #include <asm/ptrace.h>
 #include <asm/thread_info.h>
 
@@ -49,7 +48,7 @@ SP_ORIG_R2   =  STACK_FRAME_OVERHEAD + PT_ORIGGPR2
 SP_TRAP      =  (SP_ORIG_R2+GPR_SIZE)
 SP_SIZE      =  (SP_TRAP+4)
 
-_TIF_WORK_MASK = (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING | _TIF_NEED_RESCHED)
+_TIF_WORK_MASK = (_TIF_SIGPENDING | _TIF_NEED_RESCHED)
 
 /*
  * Register usage in interrupt handlers:
@@ -185,32 +184,42 @@ sysc_leave:
         RESTORE_ALL 1
 
 #
-# One of the work bits _TIF_NOTIFY_RESUME, _TIF_SIGPENDING or
-# _TIF_NEED_RESCHED is on. Find out which one.
+# recheck if there is more work to do
+#
+sysc_work_loop:
+	stnsm   48(%r15),0xfc     # disable I/O and ext. interrupts
+        GET_THREAD_INFO           # load pointer to task_struct to R9
+	tm	__TI_flags+7(%r9),_TIF_WORK_MASK
+	jz	sysc_leave        # there is no work to do
+#
+# One of the work bits is on. Find out which one.
+# Checked are: _TIF_SIGPENDING and _TIF_NEED_RESCHED
 #
 sysc_work:
-        tm      SP_PSW+1(%r15),0x01 # returning to user ?
-        jno     sysc_leave        # no-> skip resched & signal
 	tm	__TI_flags+7(%r9),_TIF_NEED_RESCHED
 	jo	sysc_reschedule
-	# add a test for TIF_NOTIFY_RESUME here when it is used.
-	# _TIF_SIGPENDING is the only flag left
+	tm	__TI_flags+7(%r9),_TIF_SIGPENDING
+	jo	sysc_sigpending
+	j	sysc_leave
 
 #
-# call do_signal before return
+# _TIF_NEED_RESCHED is set, call schedule
 #	
-sysc_signal_return:     
-        la      %r2,SP_PTREGS(%r15) # load pt_regs
-        sgr     %r3,%r3             # clear *oldset
-	larl    %r14,sysc_return
-	jg      do_signal           # return point is sysc_return
+sysc_reschedule:        
+	stosm   48(%r15),0x03     # reenable interrupts
+	larl    %r14,sysc_work_loop
+        jg      schedule            # return point is sysc_return
 
 #
-# call schedule with sysc_return as return-address
+# _TIF_SIGPENDING is set, call do_signal
 #
-sysc_reschedule:        
-	larl    %r14,sysc_return
-        jg      schedule            # return point is sysc_return
+sysc_sigpending:     
+	stosm   48(%r15),0x03     # reenable interrupts
+        la      %r2,SP_PTREGS(%r15) # load pt_regs
+        sgr     %r3,%r3           # clear *oldset
+	brasl	%r14,do_signal    # call do_signal
+	stnsm   48(%r15),0xfc     # disable I/O and ext. interrupts
+	j	sysc_leave        # out of here, do NOT recheck
 
 #
 # call syscall_trace before and after system call
@@ -242,8 +251,7 @@ sysc_tracego:
         .globl  ret_from_fork
 ret_from_fork:  
         GET_THREAD_INFO           # load pointer to task_struct to R9
-	xc      SP_R2(8,%r15),SP_R2(%r15) # child returns 0
-#ifdef CONFIG_SMP
+#if CONFIG_SMP || CONFIG_PREEMPT
 	larl    %r14,sysc_return
         jg      schedule_tail     # return to sysc_return
 #else
@@ -551,8 +559,8 @@ sys_call_table:
         .long  SYSCALL(sys_rt_sigtimedwait,sys32_rt_sigtimedwait_wrapper)
         .long  SYSCALL(sys_rt_sigqueueinfo,sys32_rt_sigqueueinfo_wrapper)
         .long  SYSCALL(sys_rt_sigsuspend_glue,sys32_rt_sigsuspend_glue)
-        .long  SYSCALL(sys_pread,sys32_pread_wrapper)           /* 180 */
-        .long  SYSCALL(sys_pwrite,sys32_pwrite_wrapper)
+        .long  SYSCALL(sys_pread64,sys32_pread64_wrapper)           /* 180 */
+        .long  SYSCALL(sys_pwrite64,sys32_pwrite64_wrapper)
         .long  SYSCALL(sys_ni_syscall,sys32_chown16_wrapper)    /* old chown16 syscall */
         .long  SYSCALL(sys_getcwd,sys32_getcwd_wrapper)
         .long  SYSCALL(sys_capget,sys32_capget_wrapper)
@@ -606,13 +614,21 @@ sys_call_table:
 	.long  SYSCALL(sys_flistxattr,sys32_flistxattr_wrapper)
 	.long  SYSCALL(sys_removexattr,sys32_removexattr_wrapper)
 	.long  SYSCALL(sys_lremovexattr,sys32_lremovexattr_wrapper)
-	.long  SYSCALL(sys_fremovexattr,sys32_fremovexattr_wrapper)
+	.long  SYSCALL(sys_fremovexattr,sys32_fremovexattr_wrapper) /* 235 */
 	.long  SYSCALL(sys_gettid,sys_gettid)
 	.long  SYSCALL(sys_tkill,sys_tkill)
 	.long  SYSCALL(sys_futex,sys32_futex_wrapper)
 	.long  SYSCALL(sys_sched_setaffinity,sys32_sched_setaffinity_wrapper)
-	.long  SYSCALL(sys_sched_getaffinity,sys32_sched_getaffinity_wrapper)
-        .rept  255-240
+	.long  SYSCALL(sys_sched_getaffinity,sys32_sched_getaffinity_wrapper) /* 240 */
+	.long  SYSCALL(sys_security,sys_ni_syscall)
+	.long  SYSCALL(sys_ni_syscall,sys_ni_syscall) /* reserved for TUX */
+	.long  SYSCALL(sys_io_setup,sys_ni_syscall)
+	.long  SYSCALL(sys_io_destroy,sys_ni_syscall)
+	.long  SYSCALL(sys_io_getevents,sys_ni_syscall)       /* 245 */
+	.long  SYSCALL(sys_io_submit,sys_ni_syscall)
+	.long  SYSCALL(sys_io_cancel,sys_ni_syscall)
+	.long  SYSCALL(sys_exit_group,sys32_exit_group_wrapper)
+        .rept  255-248
 	.long  SYSCALL(sys_ni_syscall,sys_ni_syscall)
 	.endr
 
@@ -638,13 +654,15 @@ pgm_check_handler:
         tm      __LC_PGM_INT_CODE+1,0x80 # check whether we got a per exception
         jnz     pgm_per                  # got per exception -> special case
 	SAVE_ALL __LC_PGM_OLD_PSW,1
-	llgh    %r8,__LC_PGM_INT_CODE
+	lghi	%r8,0x7f
+	lgf     %r3,__LC_PGM_ILC	 # load program interruption code
+	ngr	%r8,%r3
         sll     %r8,3
 	GET_THREAD_INFO
+	stosm   48(%r15),0x03            # reenable interrupts
         larl    %r1,pgm_check_table
         lg      %r1,0(%r8,%r1)		 # load address of handler routine
         la      %r2,SP_PTREGS(%r15)	 # address of register-save area
-	lgf     %r3,__LC_PGM_ILC	 # load program interruption code
 	larl	%r14,sysc_return
         br      %r1			 # branch to interrupt-handler
 
@@ -668,6 +686,7 @@ pgm_per_std:
 	GET_THREAD_INFO
 	lghi    %r4,0x7f
 	lgf     %r3,__LC_PGM_ILC	 # load program interruption code
+	stosm   48(%r15),0x03            # reenable interrupts
         nr      %r4,%r3			 # clear per-event-bit and ilc
         je      pgm_per_only		 # only per of per+check ?
         sll     %r4,3
@@ -751,57 +770,79 @@ io_int_handler:
 	brasl   %r14,do_IRQ            # call standard irq handler
 
 io_return:
-#
-# check, if bottom-half has to be done
-#
-        lgf     %r1,__TI_cpu(%r9)
-	larl    %r2,irq_stat
-	sll     %r1,L1_CACHE_SHIFT
-	la      %r1,0(%r1,%r2)
-	icm     %r0,15,0(%r1)          # test irq_stat[#cpu].__softirq_pending
-        jnz     io_handle_bottom_half
-io_return_bh:	
+        tm      SP_PSW+1(%r15),0x01    # returning to user ?
+#ifdef CONFIG_PREEMPT
+	jno     io_preempt             # no -> check for preemptive scheduling
+#else
+        jno     io_leave               # no-> skip resched & signal
+#endif
 	tm	__TI_flags+7(%r9),_TIF_WORK_MASK
 	jnz	io_work                # there is work to do (signals etc.)
 io_leave:
-        stnsm   48(%r15),0xfc          # disable I/O and ext. interrupts
         RESTORE_ALL 0
 
+#ifdef CONFIG_PREEMPT
+io_preempt:
+	icm	%r0,15,__TI_precount(%r9)	
+	jnz     io_leave
+io_resume_loop:
+	tm	__TI_flags+7(%r9),_TIF_NEED_RESCHED
+	jno	io_leave
+	larl    %r1,.Lc_pactive
+	mvc     __TI_precount(4,%r9),0(%r1)
+	# hmpf, we are on the async. stack but to call schedule
+	# we have to move the interrupt frame to the process stack
+	lg	%r1,SP_R15(%r15)
+	aghi	%r1,-SP_SIZE
+	nill	%r1,0xfff8
+	mvc	SP_PTREGS(SP_SIZE-SP_PTREGS,%r1),SP_PTREGS(%r15)
+        xc      0(8,%r1),0(%r1)        # clear back chain
+	lgr	%r15,%r1
+        stosm   48(%r15),0x03          # reenable interrupts
+	brasl   %r14,schedule          # call schedule
+        stnsm   48(%r15),0xfc          # disable I/O and ext. interrupts
+        GET_THREAD_INFO                # load pointer to task_struct to R9
+	xc      __TI_precount(4,%r9),__TI_precount(%r9)
+	j	io_resume_loop
+#endif
+
 #
-# call do_softirq
+# recheck if there is more work to do
 #
-io_handle_bottom_half:        
-	larl    %r14,io_return_bh
-        jg      do_softirq             # return point is io_return_bh
-
+io_work_loop:
+        stnsm   48(%r15),0xfc          # disable I/O and ext. interrupts
+        GET_THREAD_INFO                # load pointer to task_struct to R9
+	tm	__TI_flags+7(%r9),_TIF_WORK_MASK
+	jz	io_leave               # there is no work to do
 #
-# One of the work bits _TIF_NOTIFY_RESUME, _TIF_SIGPENDING or
-# _TIF_NEED_RESCHED is on. Find out which one.
+# One of the work bits is on. Find out which one.
+# Checked are: _TIF_SIGPENDING and _TIF_NEED_RESCHED
 #
 io_work:
-        tm      SP_PSW+1(%r15),0x01    # returning to user ?
-        jno     io_leave               # no-> skip resched & signal
-        stosm   48(%r15),0x03          # reenable interrupts
 	tm	__TI_flags+7(%r9),_TIF_NEED_RESCHED
 	jo	io_reschedule
-	# add a test for TIF_NOTIFY_RESUME here when it is used.
-	# _TIF_SIGPENDING is the only flag left
+	tm	__TI_flags+7(%r9),_TIF_SIGPENDING
+	jo	io_sigpending
+	j	io_leave
 
 #
-# call do_signal before return
+# _TIF_NEED_RESCHED is set, call schedule
 #	
-io_signal_return:     
-        la      %r2,SP_PTREGS(%r15) # load pt_regs
-        slgr    %r3,%r3             # clear *oldset
-	larl    %r14,io_leave
-        jg      do_signal           # return point is io_leave
+io_reschedule:        
+        stosm   48(%r15),0x03       # reenable interrupts
+	larl    %r14,io_work_loop
+        jg      schedule            # call scheduler
 
 #
-# call schedule with io_return as return-address
+# _TIF_SIGPENDING is set, call do_signal
 #
-io_reschedule:        
-	larl    %r14,io_return
-        jg      schedule            # call scheduler, return to io_return
+io_sigpending:     
+        stosm   48(%r15),0x03       # reenable interrupts
+        la      %r2,SP_PTREGS(%r15) # load pt_regs
+        slgr    %r3,%r3             # clear *oldset
+	brasl	%r14,do_signal      # call do_signal
+        stnsm   48(%r15),0xfc       # disable I/O and ext. interrupts
+	j	sysc_leave          # out of here, do NOT recheck
 
 /*
  * External interrupt handler routine
@@ -875,4 +916,5 @@ restart_go:
  */
                .align 4
 .Lc_ac:        .long  0,0,1
+.Lc_pactive:   .long  PREEMPT_ACTIVE
 .Lc256:        .quad  256

arch/s390x/kernel/head.S

@@ -555,6 +555,17 @@ startup:basr  %r13,0                     # get base
 	oi     7(%r12),16               # set MVPG flag
 0:
 
+#
+# find out if the diag 0x44 works in 64 bit mode
+#
+	la     %r1,0f-.LPG1(%r13)	# set program check address
+	stg    %r1,__LC_PGM_NEW_PSW+8
+	mvc    __LC_DIAG44_OPCODE(8),.Lnop-.LPG1(%r13)
+	diag   0,0,0x44			# test diag 0x44
+	oi     7(%r12),32		# set diag44 flag
+	mvc    __LC_DIAG44_OPCODE(8),.Ldiag44-.LPG1(%r13)
+0:	
+
         lpswe .Lentry-.LPG1(13)         # jump to _stext in primary-space,
                                         # virtual and never return ...
         .align 16
@@ -578,6 +589,8 @@ startup:basr  %r13,0                     # get base
 .Lpcmsk:.quad  0x0000000180000000
 .L4malign:.quad 0xffffffffffc00000
 .Lscan2g:.quad 0x80000000 + 0x20000 - 8 # 2GB + 128K - 8
+.Lnop:	.long  0x07000700
+.Ldiag44:.long 0x83000044
 
 	.org PARMAREA-64
 .Lduct:	.long 0,0,0,0,0,0,0,0
@@ -645,5 +658,5 @@ _stext:	basr  %r13,0                    # get base
 #
             .align 8
 .Ldw:       .quad  0x0002000180000000,0x0000000000000000
-.Laregs:    .long  0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0
+.Laregs:    .long  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
 

arch/s390x/kernel/init_task.c

@@ -15,7 +15,7 @@
 
 static struct fs_struct init_fs = INIT_FS;
 static struct files_struct init_files = INIT_FILES;
-static struct signal_struct init_signals = INIT_SIGNALS;
+static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
 struct mm_struct init_mm = INIT_MM(init_mm);
 
 /*

arch/s390x/kernel/irq.c

-/*
- *  arch/s390/kernel/irq.c
- *
- *  S390 version
- *    Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
- *    Author(s): Ingo Adlung (adlung@de.ibm.com)
- *
- *  Derived from "arch/i386/kernel/irq.c"
- *    Copyright (C) 1992, 1999 Linus Torvalds, Ingo Molnar
- *
- *  S/390 I/O interrupt processing and I/O request processing is
- *   implemented in arch/s390/kernel/s390io.c
- */
-#include <linux/module.h>
-#include <linux/config.h>
-#include <linux/ptrace.h>
-#include <linux/errno.h>
-#include <linux/kernel_stat.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/ioport.h>
-#include <linux/interrupt.h>
-#include <linux/timex.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/random.h>
-#include <linux/smp.h>
-#include <linux/threads.h>
-#include <linux/smp_lock.h>
-#include <linux/init.h>
-#include <linux/seq_file.h>
-
-#include <asm/system.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/bitops.h>
-#include <asm/smp.h>
-#include <asm/pgtable.h>
-#include <asm/delay.h>
-#include <asm/lowcore.h>
-
-void          s390_init_IRQ   ( void );
-void          s390_free_irq   ( unsigned int irq, void *dev_id);
-int           s390_request_irq( unsigned int irq,
-                     void           (*handler)(int, void *, struct pt_regs *),
-                     unsigned long  irqflags,
-                     const char    *devname,
-                     void          *dev_id);
-
-#if 0
-/*
- * The following vectors are part of the Linux architecture, there
- * is no hardware IRQ pin equivalent for them, they are triggered
- * through the ICC by us (IPIs), via smp_message_pass():
- */
-BUILD_SMP_INTERRUPT(reschedule_interrupt)
-BUILD_SMP_INTERRUPT(invalidate_interrupt)
-BUILD_SMP_INTERRUPT(stop_cpu_interrupt)
-BUILD_SMP_INTERRUPT(mtrr_interrupt)
-BUILD_SMP_INTERRUPT(spurious_interrupt)
-#endif
-
-int show_interrupts(struct seq_file *p, void *v)
-{
-	int i, j;
-
-	seq_puts(p, "           ");
-
-	for (j=0; j<smp_num_cpus; j++)
-		seq_printf(p, "CPU%d       ",j);
-
-	seq_putc(p, '\n');
-
-	for (i = 0 ; i < NR_IRQS ; i++)
-	{
-		if (ioinfo[i] == INVALID_STORAGE_AREA)
-			continue;
-
-		seq_printf(p, "%3d: ",i);
-		seq_printf(p, "  %s", ioinfo[i]->irq_desc.name);
-
-		seq_putc(p, '\n');
-	
-	} /* endfor */
-
-	return 0;
-}
-
-/*
- * Global interrupt locks for SMP. Allow interrupts to come in on any
- * CPU, yet make cli/sti act globally to protect critical regions..
- */
-#ifdef CONFIG_SMP
-atomic_t global_irq_holder = ATOMIC_INIT(NO_PROC_ID);
-atomic_t global_irq_lock = ATOMIC_INIT(0);
-atomic_t global_irq_count = ATOMIC_INIT(0);
-atomic_t global_bh_count;
-
-/*
- * "global_cli()" is a special case, in that it can hold the
- * interrupts disabled for a longish time, and also because
- * we may be doing TLB invalidates when holding the global
- * IRQ lock for historical reasons. Thus we may need to check
- * SMP invalidate events specially by hand here (but not in
- * any normal spinlocks)
- *
- * Thankfully we don't need this as we can deliver flush tlbs with
- * interrupts disabled DJB :-)
- */
-#define check_smp_invalidate(cpu)
-
-extern void show_stack(unsigned long* esp);
-
-static void show(char * str)
-{
-	int cpu = smp_processor_id();
-
-	printk("\n%s, CPU %d:\n", str, cpu);
-	printk("irq:  %d [%d]\n",
-	       atomic_read(&global_irq_count),local_irq_count(smp_processor_id()));
-	printk("bh:   %d [%d]\n",
-	       atomic_read(&global_bh_count),local_bh_count(smp_processor_id()));
-	show_stack(NULL);
-}
-
-#define MAXCOUNT 100000000
-
-static inline void wait_on_bh(void)
-{
-	int count = MAXCOUNT;
-	do {
-		if (!--count) {
-			show("wait_on_bh");
-			count = ~0;
-		}
-		/* nothing .. wait for the other bh's to go away */
-	} while (atomic_read(&global_bh_count) != 0);
-}
-
-static inline void wait_on_irq(int cpu)
-{
-	int count = MAXCOUNT;
-
-	for (;;) {
-
-		/*
-		 * Wait until all interrupts are gone. Wait
-		 * for bottom half handlers unless we're
-		 * already executing in one..
-		 */
-		if (!atomic_read(&global_irq_count)) {
-			if (local_bh_count(cpu)||
-			    !atomic_read(&global_bh_count))
-				break;
-		}
-
-		/* Duh, we have to loop. Release the lock to avoid deadlocks */
-                atomic_set(&global_irq_lock, 0);
-
-		for (;;) {
-			if (!--count) {
-				show("wait_on_irq");
-				count = ~0;
-			}
-			local_irq_enable();
-			SYNC_OTHER_CORES(cpu);
-			local_irq_disable();
-			check_smp_invalidate(cpu);
-			if (atomic_read(&global_irq_count))
-				continue;
-			if (atomic_read(&global_irq_lock))
-				continue;
-			if (!local_bh_count(cpu)
-			    && atomic_read(&global_bh_count))
-				continue;
-                        if (!atomic_compare_and_swap(0, 1, &global_irq_lock))
-				break;
-		}
-	}
-}
-
-/*
- * This is called when we want to synchronize with
- * bottom half handlers. We need to wait until
- * no other CPU is executing any bottom half handler.
- *
- * Don't wait if we're already running in an interrupt
- * context or are inside a bh handler.
- */
-void synchronize_bh(void)
-{
-	if (atomic_read(&global_bh_count) && !in_interrupt())
-		wait_on_bh();
-}
-
-/*
- * This is called when we want to synchronize with
- * interrupts. We may for example tell a device to
- * stop sending interrupts: but to make sure there
- * are no interrupts that are executing on another
- * CPU we need to call this function.
- */
-void synchronize_irq(void)
-{
-	if (atomic_read(&global_irq_count)) {
-		/* Stupid approach */
-		cli();
-		sti();
-	}
-}
-
-static inline void get_irqlock(int cpu)
-{
-	if (atomic_compare_and_swap(0,1,&global_irq_lock) != 0) {
-		/* do we already hold the lock? */
-		if ( cpu == atomic_read(&global_irq_holder))
-			return;
-		/* Uhhuh.. Somebody else got it. Wait.. */
-		do {
-			check_smp_invalidate(cpu);
-		} while (atomic_compare_and_swap(0,1,&global_irq_lock) != 0);
-	}
-	/*
-	 * We also to make sure that nobody else is running
-	 * in an interrupt context.
-	 */
-	wait_on_irq(cpu);
-
-	/*
-	 * Ok, finally..
-	 */
-	atomic_set(&global_irq_holder,cpu);
-}
-
-#define EFLAGS_I_SHIFT 57
-
-/*
- * A global "cli()" while in an interrupt context
- * turns into just a local cli(). Interrupts
- * should use spinlocks for the (very unlikely)
- * case that they ever want to protect against
- * each other.
- *
- * If we already have local interrupts disabled,
- * this will not turn a local disable into a
- * global one (problems with spinlocks: this makes
- * save_flags+cli+sti usable inside a spinlock).
- */
-void __global_cli(void)
-{
-	unsigned long flags;
-
-	local_save_flags(flags);
-	if (flags & (1UL << EFLAGS_I_SHIFT)) {
-		int cpu = smp_processor_id();
-		local_irq_disable();
-		if (!in_irq())
-			get_irqlock(cpu);
-	}
-}
-
-void __global_sti(void)
-{
-
-	if (!in_irq())
-		release_irqlock(smp_processor_id());
-	local_irq_enable();
-}
-
-/*
- * SMP flags value to restore to:
- * 0 - global cli
- * 1 - global sti
- * 2 - local cli
- * 3 - local sti
- */
-unsigned long __global_save_flags(void)
-{
-	int retval;
-	int local_enabled;
-	unsigned long flags;
-
-	local_save_flags(flags);
-	local_enabled = (flags >> EFLAGS_I_SHIFT) & 1;
-	/* default to local */
-	retval = 2 + local_enabled;
-
-	/* check for global flags if we're not in an interrupt */
-	if (!in_irq())
-	{
-		if (local_enabled)
-			retval = 1;
-		if (atomic_read(&global_irq_holder)== smp_processor_id())
-			retval = 0;
-	}
-	return retval;
-}
-
-void __global_restore_flags(unsigned long flags)
-{
-	switch (flags) {
-	case 0:
-		__global_cli();
-		break;
-	case 1:
-		__global_sti();
-		break;
-	case 2:
-		local_irq_disable();
-		break;
-	case 3:
-		local_irq_enable();
-		break;
-	default:
-		printk("global_restore_flags: %08lx (%08lx)\n",
-		       flags, (&flags)[-1]);
-	}
-}
-
-#endif
-
-
-void __init init_IRQ(void)
-{
-   s390_init_IRQ();
-}
-
-
-void free_irq(unsigned int irq, void *dev_id)
-{
-   s390_free_irq( irq, dev_id);
-}
-
-
-int request_irq( unsigned int   irq,
-                 void           (*handler)(int, void *, struct pt_regs *),
-                 unsigned long  irqflags,
-                 const char    *devname,
-                 void          *dev_id)
-{
-   return( s390_request_irq( irq, handler, irqflags, devname, dev_id ) );
-
-}
-
-void init_irq_proc(void)
-{
-        /* For now, nothing... */
-}
-
-#ifdef CONFIG_SMP
-EXPORT_SYMBOL(__global_cli);
-EXPORT_SYMBOL(__global_sti);
-EXPORT_SYMBOL(__global_save_flags);
-EXPORT_SYMBOL(__global_restore_flags);
-EXPORT_SYMBOL(global_irq_holder);
-EXPORT_SYMBOL(global_irq_lock);
-EXPORT_SYMBOL(global_irq_count);
-EXPORT_SYMBOL(global_bh_count);
-#endif
-
-EXPORT_SYMBOL(global_bh_lock);

arch/s390x/kernel/linux32.c

@@ -514,16 +514,15 @@ static int do_sys32_msgsnd (int first, int second, int third, void *uptr)
 	if (!p)
 		return -ENOMEM;
 
+	err = -EINVAL;
 	if (second > MSGMAX || first < 0 || second < 0)
-		return -EINVAL;
+		goto out;
 
 	err = -EFAULT;
 	if (!uptr)
 		goto out;
-
-	err = get_user (p->mtype, &up->mtype);
-	err |= __copy_from_user (p->mtext, &up->mtext, second);
-	if (err)
+        if (get_user (p->mtype, &up->mtype) ||
+	    __copy_from_user (p->mtext, &up->mtext, second))
 		goto out;
 	old_fs = get_fs ();
 	set_fs (KERNEL_DS);
@@ -1953,15 +1952,17 @@ sys32_rt_sigtimedwait(sigset_t32 *uthese, siginfo_t32 *uinfo,
 			return -EINVAL;
 	}
 
-	spin_lock_irq(&current->sigmask_lock);
-	sig = dequeue_signal(&these, &info);
+	spin_lock_irq(&current->sig->siglock);
+	sig = dequeue_signal(&current->sig->shared_pending, &these, &info);
+	if (!sig)
+		sig = dequeue_signal(&current->pending, &these, &info);
 	if (!sig) {
 		/* None ready -- temporarily unblock those we're interested
 		   in so that we'll be awakened when they arrive.  */
-		sigset_t oldblocked = current->blocked;
+		current->real_blocked = current->blocked;
 		sigandsets(&current->blocked, &current->blocked, &these);
 		recalc_sigpending();
-		spin_unlock_irq(&current->sigmask_lock);
+		spin_unlock_irq(&current->sig->siglock);
 
 		timeout = MAX_SCHEDULE_TIMEOUT;
 		if (uts)
@@ -1971,12 +1972,15 @@ sys32_rt_sigtimedwait(sigset_t32 *uthese, siginfo_t32 *uinfo,
 		current->state = TASK_INTERRUPTIBLE;
 		timeout = schedule_timeout(timeout);
 
-		spin_lock_irq(&current->sigmask_lock);
-		sig = dequeue_signal(&these, &info);
-		current->blocked = oldblocked;
+		spin_lock_irq(&current->sig->siglock);
+		sig = dequeue_signal(&current->sig->shared_pending, &these, &info);
+		if (!sig)
+			sig = dequeue_signal(&current->pending, &these, &info);
+		current->blocked = current->real_blocked;
+		siginitset(&current->real_blocked, 0);
 		recalc_sigpending();
 	}
-	spin_unlock_irq(&current->sigmask_lock);
+	spin_unlock_irq(&current->sig->siglock);
 
 	if (sig) {
 		ret = sig;
@@ -3988,13 +3992,13 @@ extern asmlinkage ssize_t sys_pwrite64(unsigned int fd, const char * buf,
 
 typedef __kernel_ssize_t32 ssize_t32;
 
-asmlinkage ssize_t32 sys32_pread(unsigned int fd, char *ubuf,
+asmlinkage ssize_t32 sys32_pread64(unsigned int fd, char *ubuf,
 				 __kernel_size_t32 count, u32 poshi, u32 poslo)
 {
 	return sys_pread64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo));
 }
 
-asmlinkage ssize_t32 sys32_pwrite(unsigned int fd, char *ubuf,
+asmlinkage ssize_t32 sys32_pwrite64(unsigned int fd, char *ubuf,
 				  __kernel_size_t32 count, u32 poshi, u32 poslo)
 {
 	return sys_pwrite64(fd, ubuf, count, ((loff_t)AA(poshi) << 32) | AA(poslo));
@@ -4522,3 +4526,34 @@ asmlinkage int sys32_sched_getaffinity(__kernel_pid_t32 pid, unsigned int len,
 
 	return ret;
 }
+
+asmlinkage int 
+sys_futex(void *uaddr, int op, int val, struct timespec *utime);
+
+asmlinkage int
+sys32_futex(void *uaddr, int op, int val, 
+		 struct timespec32 *timeout32)
+{
+	long ret;
+	struct timespec tmp, *timeout;
+
+	ret = -ENOMEM;
+	timeout = kmalloc(sizeof(*timeout), GFP_USER);
+	if (!timeout)
+		goto out;
+
+	ret = -EINVAL;
+	if (get_user (tmp.tv_sec,  &timeout32->tv_sec)  ||
+	    get_user (tmp.tv_nsec, &timeout32->tv_nsec) ||
+	    put_user (tmp.tv_sec,  &timeout->tv_sec)    ||
+	    put_user (tmp.tv_nsec, &timeout->tv_nsec))
+		goto out_free;
+
+	ret = sys_futex(uaddr, op, val, timeout);
+
+out_free:
+	kfree(timeout);
+out:
+	return ret;
+}
+

arch/s390x/kernel/linux32.h

@@ -8,8 +8,6 @@
 #include <linux/nfsd/nfsd.h>
 #include <linux/nfsd/export.h>
 
-#ifdef CONFIG_S390_SUPPORT
-
 /* Macro that masks the high order bit of an 32 bit pointer and converts it*/
 /*       to a 64 bit pointer */
 #define A(__x) ((unsigned long)((__x) & 0x7FFFFFFFUL))
@@ -194,6 +192,32 @@ typedef struct
         __u32	addr;
 } _psw_t32 __attribute__ ((aligned(8)));
 
+#define PSW32_MASK_PER		0x40000000UL
+#define PSW32_MASK_DAT		0x04000000UL
+#define PSW32_MASK_IO		0x02000000UL
+#define PSW32_MASK_EXT		0x01000000UL
+#define PSW32_MASK_KEY		0x00F00000UL
+#define PSW32_MASK_MCHECK	0x00040000UL
+#define PSW32_MASK_WAIT		0x00020000UL
+#define PSW32_MASK_PSTATE	0x00010000UL
+#define PSW32_MASK_ASC		0x0000C000UL
+#define PSW32_MASK_CC		0x00003000UL
+#define PSW32_MASK_PM		0x00000f00UL
+
+#define PSW32_ADDR_AMODE31	0x80000000UL
+#define PSW32_ADDR_INSN		0x7FFFFFFFUL
+
+#define PSW32_BASE_BITS		0x00080000UL
+
+#define PSW32_ASC_PRIMARY	0x00000000UL
+#define PSW32_ASC_ACCREG	0x00004000UL
+#define PSW32_ASC_SECONDARY	0x00008000UL
+#define PSW32_ASC_HOME		0x0000C000UL
+
+#define PSW32_USER_BITS	(PSW32_BASE_BITS | PSW32_MASK_DAT | PSW32_ASC_HOME | \
+			 PSW32_MASK_IO | PSW32_MASK_EXT | PSW32_MASK_MCHECK | \
+			 PSW32_MASK_PSTATE)
+
 typedef struct
 {
 	_psw_t32	psw;
@@ -241,6 +265,4 @@ struct ucontext32 {
 	sigset_t32		uc_sigmask;	/* mask last for extensibility */
 };
 
-#endif /* !CONFIG_S390_SUPPORT */
- 
 #endif /* _ASM_S390X_S390_H */

arch/s390x/kernel/process.c

@@ -15,9 +15,6 @@
  * This file handles the architecture-dependent parts of process handling..
  */
 
-#define __KERNEL_SYSCALLS__
-#include <stdarg.h>
-
 #include <linux/config.h>
 #include <linux/errno.h>
 #include <linux/sched.h>
@@ -78,9 +75,10 @@ void default_idle(void)
 
 	/* 
 	 * Wait for external, I/O or machine check interrupt and
-	 * switch of machine check bit after the wait has ended.
+	 * switch off machine check bit after the wait has ended.
 	 */
-	wait_psw.mask = _WAIT_PSW_MASK;
+	wait_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK | PSW_MASK_WAIT |
+		PSW_MASK_IO | PSW_MASK_EXT;
 	asm volatile (
 		"    larl  %0,0f\n"
 		"    stg   %0,8(%1)\n"
@@ -114,35 +112,39 @@ void show_regs(struct pt_regs *regs)
 
 	show_registers(regs);
 	/* Show stack backtrace if pt_regs is from kernel mode */
-	if (!(regs->psw.mask & PSW_PROBLEM_STATE))
+	if (!(regs->psw.mask & PSW_MASK_PSTATE))
 		show_trace((unsigned long *) regs->gprs[15]);
 }
 
+extern void kernel_thread_starter(void);
+__asm__(".align 4\n"
+	"kernel_thread_starter:\n"
+	"    lg    15,0(8)\n"
+	"    sgr   15,7\n"
+	"    stosm 48(15),3\n"
+	"    lgr   2,10\n"
+	"    basr  14,9\n"
+	"    sgr   2,2\n"
+	"    br    11\n");
+
 int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
 {
-        int clone_arg = flags | CLONE_VM;
-        int retval;
-
-        __asm__ __volatile__(
-                "     slgr  2,2\n"
-                "     lgr   3,%1\n"
-                "     lg    4,%6\n"     /* load kernel stack ptr of parent */
-                "     svc   %b2\n"                     /* Linux system call*/
-                "     clg   4,%6\n"    /* compare ksp's: child or parent ? */
-                "     je    0f\n"                          /* parent - jump*/
-                "     lg    15,%6\n"            /* fix kernel stack pointer*/
-                "     aghi  15,%7\n"
-                "     xc    0(160,15),0(15)\n"          /* clear save area */
-                "     lgr   2,%4\n"                        /* load argument*/
-                "     basr  14,%5\n"                             /* call fn*/
-                "     svc   %b3\n"                     /* Linux system call*/
-                "0:   lgr   %0,2"
-                : "=a" (retval)
-                : "d" (clone_arg), "i" (__NR_clone), "i" (__NR_exit),
-                  "d" (arg), "a" (fn), "i" (__LC_KERNEL_STACK) ,
-                  "i" (-STACK_FRAME_OVERHEAD)
-                : "2", "3", "4" );
-        return retval;
+	struct task_struct *p;
+	struct pt_regs regs;
+
+	memset(&regs, 0, sizeof(regs));
+	regs.psw.mask = PSW_KERNEL_BITS;
+	regs.psw.addr = (__u64) kernel_thread_starter;
+	regs.gprs[7] = STACK_FRAME_OVERHEAD;
+	regs.gprs[8] = __LC_KERNEL_STACK;
+	regs.gprs[9] = (unsigned long) fn;
+	regs.gprs[10] = (unsigned long) arg;
+	regs.gprs[11] = (unsigned long) do_exit;
+	regs.orig_gpr2 = -1;
+
+	/* Ok, create the new process.. */
+	p = do_fork(flags | CLONE_VM, 0, &regs, 0, NULL);
+	return IS_ERR(p) ? PTR_ERR(p) : p->pid;
 }
 
 /*
@@ -184,17 +186,20 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long new_stackp,
 		 (THREAD_SIZE + (unsigned long) p->thread_info)) - 1;
         p->thread.ksp = (unsigned long) frame;
         frame->childregs = *regs;
+	frame->childregs.gprs[2] = 0;	/* child returns 0 on fork. */
         frame->childregs.gprs[15] = new_stackp;
         frame->back_chain = frame->eos = 0;
 
-        /* new return point is ret_from_sys_call */
-        frame->gprs[8] = (unsigned long) &ret_from_fork;
+        /* new return point is ret_from_fork */
+        frame->gprs[8] = (unsigned long) ret_from_fork;
 
         /* fake return stack for resume(), don't go back to schedule */
         frame->gprs[9] = (unsigned long) frame;
-        /* save fprs, if used in last task */
+        /* save fprs */
 	save_fp_regs(&p->thread.fp_regs);
         p->thread.user_seg = __pa((unsigned long) p->mm->pgd) | _REGION_TABLE;
+	/* start new process with ar4 pointing to the correct address space */
+	p->thread.ar4 = get_fs().ar4;
         /* Don't copy debug registers */
         memset(&p->thread.per_info,0,sizeof(p->thread.per_info));
         return 0;
@@ -203,7 +208,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long new_stackp,
 asmlinkage int sys_fork(struct pt_regs regs)
 {
 	struct task_struct *p;
-        p = do_fork(SIGCHLD, regs.gprs[15], &regs, 0);
+        p = do_fork(SIGCHLD, regs.gprs[15], &regs, 0, NULL);
 	return IS_ERR(p) ? PTR_ERR(p) : p->pid;
 }
 
@@ -212,12 +217,14 @@ asmlinkage int sys_clone(struct pt_regs regs)
         unsigned long clone_flags;
         unsigned long newsp;
 	struct task_struct *p;
+	int *user_tid;
 
         clone_flags = regs.gprs[3];
         newsp = regs.orig_gpr2;
+	user_tid = (int *) regs.gprs[4];
         if (!newsp)
                 newsp = regs.gprs[15];
-        p = do_fork(clone_flags & ~CLONE_IDLETASK, newsp, &regs, 0);
+        p = do_fork(clone_flags & ~CLONE_IDLETASK, newsp, &regs, 0, user_tid);
 	return IS_ERR(p) ? PTR_ERR(p) : p->pid;
 }
 
@@ -234,7 +241,8 @@ asmlinkage int sys_clone(struct pt_regs regs)
 asmlinkage int sys_vfork(struct pt_regs regs)
 {
 	struct task_struct *p;
-	p = do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs.gprs[15], &regs, 0);
+	p = do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD,
+		    regs.gprs[15], &regs, 0, NULL);
 	return IS_ERR(p) ? PTR_ERR(p) : p->pid;
 }
 
@@ -250,15 +258,12 @@ asmlinkage int sys_execve(struct pt_regs regs)
         error = PTR_ERR(filename);
         if (IS_ERR(filename))
                 goto out;
-        error = do_execve(filename, (char **) regs.gprs[3], (char **) regs.gprs[4], &regs);
-	if (error == 0)
-	{
+        error = do_execve(filename, (char **) regs.gprs[3],
+			  (char **) regs.gprs[4], &regs);
+	if (error == 0) {
 		current->ptrace &= ~PT_DTRACE;
-		current->thread.fp_regs.fpc=0;
-		__asm__ __volatile__
-		        ("sr  0,0\n\t"
-		         "sfpc 0,0\n\t"
-			 : : :"0");
+		current->thread.fp_regs.fpc = 0;
+		asm volatile("sfpc %0,%0" : : "d" (0));
 	}
         putname(filename);
 out:
@@ -285,15 +290,15 @@ void dump_thread(struct pt_regs * regs, struct user * dump)
 	dump->magic = CMAGIC;
 	dump->start_code = 0;
 	dump->start_stack = regs->gprs[15] & ~(PAGE_SIZE - 1);
-	dump->u_tsize = ((unsigned long) current->mm->end_code) >> PAGE_SHIFT;
-	dump->u_dsize = ((unsigned long) (current->mm->brk + (PAGE_SIZE-1))) >> PAGE_SHIFT;
+	dump->u_tsize = current->mm->end_code >> PAGE_SHIFT;
+	dump->u_dsize = (current->mm->brk + PAGE_SIZE - 1) >> PAGE_SHIFT;
 	dump->u_dsize -= dump->u_tsize;
 	dump->u_ssize = 0;
 	if (dump->start_stack < TASK_SIZE)
-		dump->u_ssize = ((unsigned long) (TASK_SIZE - dump->start_stack)) >> PAGE_SHIFT;
-	memcpy(&dump->regs.gprs[0],regs,sizeof(s390_regs));
+		dump->u_ssize = (TASK_SIZE - dump->start_stack) >> PAGE_SHIFT;
+	memcpy(&dump->regs, regs, sizeof(s390_regs));
 	dump_fpu (regs, &dump->regs.fp_regs);
-	memcpy(&dump->regs.per_info,&current->thread.per_info,sizeof(per_struct));
+	dump->regs.per_info = current->thread.per_info;
 }
 
 /*

arch/s390x/kernel/ptrace32.h

+#ifndef _PTRACE32_H
+#define _PTRACE32_H
+
+#include "linux32.h"  /* needed for _psw_t32 */
+
+typedef struct
+{
+	__u32 cr[3];
+} per_cr_words32  __attribute__((packed));
+
+typedef struct
+{
+	__u16          perc_atmid;          /* 0x096 */
+	__u32          address;             /* 0x098 */
+	__u8           access_id;           /* 0x0a1 */
+} per_lowcore_words32  __attribute__((packed));
+
+typedef struct
+{
+	union {
+		per_cr_words32   words;
+	} control_regs  __attribute__((packed));
+	/*
+	 * Use these flags instead of setting em_instruction_fetch
+	 * directly they are used so that single stepping can be
+	 * switched on & off while not affecting other tracing
+	 */
+	unsigned  single_step       : 1;
+	unsigned  instruction_fetch : 1;
+	unsigned                    : 30;
+	/*
+	 * These addresses are copied into cr10 & cr11 if single
+	 * stepping is switched off
+	 */
+	__u32     starting_addr;
+	__u32     ending_addr;
+	union {
+		per_lowcore_words32 words;
+	} lowcore; 
+} per_struct32 __attribute__((packed));
+
+struct user_regs_struct32
+{
+	_psw_t32 psw;
+	u32 gprs[NUM_GPRS];
+	u32 acrs[NUM_ACRS];
+	u32 orig_gpr2;
+	s390_fp_regs fp_regs;
+	/*
+	 * These per registers are in here so that gdb can modify them
+	 * itself as there is no "official" ptrace interface for hardware
+	 * watchpoints. This is the way intel does it.
+	 */
+	per_struct32 per_info;
+	u32  ieee_instruction_pointer; 
+	/* Used to give failing instruction back to user for ieee exceptions */
+};
+
+struct user32 {
+	/* We start with the registers, to mimic the way that "memory"
+	   is returned from the ptrace(3,...) function.  */
+	struct user_regs_struct32 regs; /* Where the registers are actually stored */
+	/* The rest of this junk is to help gdb figure out what goes where */
+	u32 u_tsize;		/* Text segment size (pages). */
+	u32 u_dsize;	        /* Data segment size (pages). */
+	u32 u_ssize;	        /* Stack segment size (pages). */
+	u32 start_code;         /* Starting virtual address of text. */
+	u32 start_stack;	/* Starting virtual address of stack area.
+				   This is actually the bottom of the stack,
+				   the top of the stack is always found in the
+				   esp register.  */
+	s32 signal;     	 /* Signal that caused the core dump. */
+	u32 u_ar0;               /* Used by gdb to help find the values for */
+	                         /* the registers. */
+	u32 magic;		 /* To uniquely identify a core file */
+	char u_comm[32];	 /* User command that was responsible */
+};
+
+typedef struct
+{
+	__u32   len;
+	__u32   kernel_addr;
+	__u32   process_addr;
+} ptrace_area_emu31;
+
+#endif /* _PTRACE32_H */

arch/s390x/kernel/s390fpu.c

-/*
- *  arch/s390/kernel/s390fpu.c
- *
- *  S390 version
- *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
- *    Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
- *
- *  s390fpu.h functions for saving & restoring the fpu state.
- *
- *  I couldn't inline these as linux/sched.h included half the world
- *  & was required to at the task structure.
- *  & the functions were too complex to make macros from.
- *  ( & as usual I didn't feel like debugging inline code ).
- */
-
-#include <linux/sched.h>
-
-void save_fp_regs(s390_fp_regs *fpregs)
-{
-/*
- * I don't think we can use STE here as this would load
- * fp registers 0 & 2 into memory locations 0 & 1 etc. 
- */	
-	asm volatile ("STFPC 0(%0)\n\t"
-		      "STD   0,8(%0)\n\t"
-		      "STD   1,16(%0)\n\t"
-		      "STD   2,24(%0)\n\t"
-		      "STD   3,32(%0)\n\t"
-		      "STD   4,40(%0)\n\t"
-		      "STD   5,48(%0)\n\t"
-		      "STD   6,56(%0)\n\t"
-		      "STD   7,64(%0)\n\t"
-		      "STD   8,72(%0)\n\t"
-		      "STD   9,80(%0)\n\t"
-		      "STD   10,88(%0)\n\t"
-		      "STD   11,96(%0)\n\t"
-		      "STD   12,104(%0)\n\t"
-		      "STD   13,112(%0)\n\t"
-		      "STD   14,120(%0)\n\t"
-		      "STD   15,128(%0)\n\t"
-                      : 
-		      : "a" (fpregs)
-		      : "memory"
-		);
-}
-
-void restore_fp_regs(s390_fp_regs *fpregs)
-{
-	/* If we don't mask with the FPC_VALID_MASK here
-	 * we've got a very quick shutdown -h now command
-         * via a kernel specification exception.
-	 */
-	fpregs->fpc&=FPC_VALID_MASK;
-	asm volatile ("LFPC 0(%0)\n\t"
-		      "LD   0,8(%0)\n\t"
-		      "LD   1,16(%0)\n\t"
-		      "LD   2,24(%0)\n\t"
-		      "LD   3,32(%0)\n\t"
-		      "LD   4,40(%0)\n\t"
-		      "LD   5,48(%0)\n\t"
-		      "LD   6,56(%0)\n\t"
-		      "LD   7,64(%0)\n\t"
-		      "LD   8,72(%0)\n\t"
-		      "LD   9,80(%0)\n\t"
-		      "LD   10,88(%0)\n\t"
-		      "LD   11,96(%0)\n\t"
-		      "LD   12,104(%0)\n\t"
-		      "LD   13,112(%0)\n\t"
-		      "LD   14,120(%0)\n\t"
-		      "LD   15,128(%0)\n\t"
-                      : 
-		      : "a" (fpregs)
-		      : "memory"
-		);
-}
-
-
-
-
-
-
-
-
-
-
-
-

arch/s390x/kernel/setup.c

@@ -52,7 +52,6 @@ unsigned long machine_flags = 0;
 struct { unsigned long addr, size, type; } memory_chunk[16] = { { 0 } };
 #define CHUNK_READ_WRITE 0
 #define CHUNK_READ_ONLY 1
-__u16 boot_cpu_addr;
 int cpus_initialized = 0;
 unsigned long cpu_initialized = 0;
 volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */
@@ -79,7 +78,7 @@ static struct resource data_resource = { "Kernel data", 0, 0 };
 /*
  * cpu_init() initializes state that is per-CPU.
  */
-void __init cpu_init (void)
+void __devinit cpu_init (void)
 {
         int nr = smp_processor_id();
         int addr = hard_smp_processor_id();
@@ -305,7 +304,7 @@ void __init setup_arch(char **cmdline_p)
 	unsigned long start_pfn, end_pfn;
         static unsigned int smptrap=0;
         unsigned long delay = 0;
-	struct _lowcore *lowcore;
+	struct _lowcore *lc;
 	int i;
 
         if (smptrap)
@@ -442,30 +441,32 @@ void __init setup_arch(char **cmdline_p)
         /*
          * Setup lowcore for boot cpu
          */
-	lowcore = (struct _lowcore *) 
-		__alloc_bootmem(2*PAGE_SIZE, 2*PAGE_SIZE, 0);
-	memset(lowcore, 0, 2*PAGE_SIZE);
-	lowcore->restart_psw.mask = _RESTART_PSW_MASK;
-	lowcore->restart_psw.addr = (addr_t) &restart_int_handler;
-	lowcore->external_new_psw.mask = _EXT_PSW_MASK;
-	lowcore->external_new_psw.addr = (addr_t) &ext_int_handler;
-	lowcore->svc_new_psw.mask = _SVC_PSW_MASK;
-	lowcore->svc_new_psw.addr = (addr_t) &system_call;
-	lowcore->program_new_psw.mask = _PGM_PSW_MASK;
-	lowcore->program_new_psw.addr = (addr_t) &pgm_check_handler;
-	lowcore->mcck_new_psw.mask = _MCCK_PSW_MASK;
-	lowcore->mcck_new_psw.addr = (addr_t) &mcck_int_handler;
-	lowcore->io_new_psw.mask = _IO_PSW_MASK;
-	lowcore->io_new_psw.addr = (addr_t) &io_int_handler;
-	lowcore->ipl_device = S390_lowcore.ipl_device;
-	lowcore->kernel_stack = ((__u64) &init_thread_union) + 16384;
-	lowcore->async_stack = (__u64)
+	lc = (struct _lowcore *) __alloc_bootmem(2*PAGE_SIZE, 2*PAGE_SIZE, 0);
+	memset(lc, 0, 2*PAGE_SIZE);
+	lc->restart_psw.mask = PSW_BASE_BITS;
+	lc->restart_psw.addr = (addr_t) &restart_int_handler;
+	lc->external_new_psw.mask = PSW_KERNEL_BITS;
+	lc->external_new_psw.addr = (addr_t) &ext_int_handler;
+	lc->svc_new_psw.mask = PSW_KERNEL_BITS;
+	lc->svc_new_psw.addr = (addr_t) &system_call;
+	lc->program_new_psw.mask = PSW_KERNEL_BITS;
+	lc->program_new_psw.addr = (addr_t) &pgm_check_handler;
+	lc->mcck_new_psw.mask = PSW_KERNEL_BITS;
+	lc->mcck_new_psw.addr = (addr_t) &mcck_int_handler;
+	lc->io_new_psw.mask = PSW_KERNEL_BITS;
+	lc->io_new_psw.addr = (addr_t) &io_int_handler;
+	lc->ipl_device = S390_lowcore.ipl_device;
+	lc->kernel_stack = ((__u64) &init_thread_union) + 16384;
+	lc->async_stack = (__u64)
 		__alloc_bootmem(4*PAGE_SIZE, 4*PAGE_SIZE, 0) + 16384;
-	lowcore->jiffy_timer = -1LL;
-	set_prefix((__u32)(__u64) lowcore);
+	lc->jiffy_timer = -1LL;
+	if (MACHINE_HAS_DIAG44)
+		lc->diag44_opcode = 0x83000044;
+	else
+		lc->diag44_opcode = 0x07000700;
+	set_prefix((__u32)(__u64) lc);
         cpu_init();
-        boot_cpu_addr = S390_lowcore.cpu_data.cpu_addr;
-        __cpu_logical_map[0] = boot_cpu_addr;
+        __cpu_logical_map[0] = S390_lowcore.cpu_data.cpu_addr;
 
 	/*
 	 * Create kernel page tables and switch to virtual addressing.
@@ -514,11 +515,14 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 		seq_printf(m, "vendor_id       : IBM/S390\n"
 				"# processors    : %i\n"
 				"bogomips per cpu: %lu.%02lu\n",
-				smp_num_cpus, loops_per_jiffy/(500000/HZ),
+				num_online_cpus(), loops_per_jiffy/(500000/HZ),
 				(loops_per_jiffy/(5000/HZ))%100);
 	}
 	if (cpu_online_map & (1 << n)) {
-		cpuinfo = &safe_get_cpu_lowcore(n)->cpu_data;
+		if (smp_processor_id() == n)
+			cpuinfo = &S390_lowcore.cpu_data;
+		else
+			cpuinfo = &lowcore_ptr[n]->cpu_data;
 		seq_printf(m, "processor %li: "
 				"version = %02X,  "
 				"identification = %06X,  "

arch/s390x/kernel/wrapper32.S

@@ -872,23 +872,23 @@ sys32_rt_sigqueueinfo_wrapper:
 
 #sys32_rt_sigsuspend_wrapper		# done in rt_sigsuspend_glue 
 
-	.globl  sys32_pread_wrapper 
-sys32_pread_wrapper:
+	.globl  sys32_pread64_wrapper 
+sys32_pread64_wrapper:
 	llgfr	%r2,%r2			# unsigned int
 	llgtr	%r3,%r3			# char *
 	llgfr	%r4,%r4			# size_t
 	llgfr	%r5,%r5			# u32
 	llgfr	%r6,%r6			# u32
-	jg	sys32_pread		# branch to system call
+	jg	sys32_pread64		# branch to system call
 
-	.globl  sys32_pwrite_wrapper 
-sys32_pwrite_wrapper:
+	.globl  sys32_pwrite64_wrapper 
+sys32_pwrite64_wrapper:
 	llgfr	%r2,%r2			# unsigned int
 	llgtr	%r3,%r3			# const char *
 	llgfr	%r4,%r4			# size_t
 	llgfr	%r5,%r5			# u32
 	llgfr	%r6,%r6			# u32
-	jg	sys32_pwrite		# branch to system call
+	jg	sys32_pwrite64		# branch to system call
 
 	.globl  sys32_chown16_wrapper 
 sys32_chown16_wrapper:
@@ -1114,7 +1114,7 @@ sys32_futex_wrapper:
 	lgfr	%r3,%r3			# int
 	lgfr	%r4,%r4			# int
 	llgtr	%r5,%r5			# struct timespec *
-	jg	sys_futex		# branch to system call
+	jg	sys32_futex		# branch to system call
 
 	.globl	sys32_setxattr_wrapper
 sys32_setxattr_wrapper:
@@ -1220,3 +1220,7 @@ sys32_sched_getaffinity_wrapper:
 	llgtr	%r4,%r4			# unsigned long *
 	jg	sys32_sched_getaffinity
 
+	.globl  sys32_exit_group_wrapper
+sys32_exit_group_wrapper:
+	lgfr	%r2,%r2			# int
+	jg	sys_exit_group		# branch to system call

arch/s390x/lib/Makefile

@@ -6,8 +6,7 @@ L_TARGET = lib.a
 
 EXTRA_AFLAGS := -traditional
 
-obj-y = checksum.o delay.o memset.o misaligned.o strcmp.o strncpy.o uaccess.o
-export-objs += misaligned.o
+obj-y = delay.o memset.o strcmp.o strncpy.o uaccess.o
 
 include $(TOPDIR)/Rules.make
 

drivers/s390/Makefile

@@ -7,6 +7,9 @@ export-objs := s390dyn.o qdio.o
 obj-$(CONFIG_QDIO) += qdio.o
 
 obj-y += s390mach.o s390dyn.o sysinfo.o
-obj-y += block/ char/ misc/ net/ cio/
+obj-y += cio/ block/ char/ misc/ net/
+
+drivers-y += drivers/s390/built-in.o
 
 include $(TOPDIR)/Rules.make
+

drivers/s390/char/tubio.h

@@ -234,7 +234,7 @@ typedef struct tub_s {
 	enum tubstat    stat;
 	enum tubcmd     cmd;
 	int             flags;		/* See below for values */
-	struct tq_struct tqueue;
+	struct tasklet_struct tasklet;
 
 	/* Stuff for fs-driver support */
 	pid_t           fs_pid;         /* Pid if TBM_FS */