Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha

Pull alpha architecture fixes from Matt Turner:
 "This contains mostly clean ups and fixes but also an implementation of
  atomic64_dec_if_positive() and a pair of new syscalls"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha:
  alpha: Use handle_percpu_irq for the timer interrupt
  alpha: Force the user-visible HZ to a constant 1024.
  alpha: Don't if-out dp264_device_interrupt.
  alpha: Use __builtin_alpha_rpcc
  alpha: Fix type compatibility warning for marvel_map_irq
  alpha: Generate dwarf2 unwind info for various kernel entry points.
  alpha: Implement atomic64_dec_if_positive
  alpha: Improve atomic_add_unless
  alpha: Modernize lib/mpi/longlong.h
  alpha: Add kcmp and finit_module syscalls
  alpha: locks: remove unused arch_*_relax operations
  alpha: kernel: typo issue, using '1' instead of '11'
  alpha: kernel: using memcpy() instead of strcpy()
  alpha: Convert print_symbol to %pSR

arch/alpha/Kconfig

@@ -15,6 +15,7 @@ config ALPHA
 	select ARCH_WANT_OPTIONAL_GPIOLIB
 	select ARCH_WANT_IPC_PARSE_VERSION
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
+	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
 	select GENERIC_SMP_IDLE_THREAD
 	select GENERIC_CMOS_UPDATE
 	select GENERIC_STRNCPY_FROM_USER

arch/alpha/include/asm/atomic.h

@@ -186,17 +186,24 @@ static __inline__ long atomic64_sub_return(long i, atomic64_t * v)
  */
 static __inline__ int __atomic_add_unless(atomic_t *v, int a, int u)
 {
-	int c, old;
-	c = atomic_read(v);
-	for (;;) {
-		if (unlikely(c == (u)))
-			break;
-		old = atomic_cmpxchg((v), c, c + (a));
-		if (likely(old == c))
-			break;
-		c = old;
-	}
-	return c;
+	int c, new, old;
+	smp_mb();
+	__asm__ __volatile__(
+	"1:	ldl_l	%[old],%[mem]\n"
+	"	cmpeq	%[old],%[u],%[c]\n"
+	"	addl	%[old],%[a],%[new]\n"
+	"	bne	%[c],2f\n"
+	"	stl_c	%[new],%[mem]\n"
+	"	beq	%[new],3f\n"
+	"2:\n"
+	".subsection 2\n"
+	"3:	br	1b\n"
+	".previous"
+	: [old] "=&r"(old), [new] "=&r"(new), [c] "=&r"(c)
+	: [mem] "m"(*v), [a] "rI"(a), [u] "rI"((long)u)
+	: "memory");
+	smp_mb();
+	return old;
 }
 
 
@@ -207,21 +214,56 @@ static __inline__ int __atomic_add_unless(atomic_t *v, int a, int u)
  * @u: ...unless v is equal to u.
  *
  * Atomically adds @a to @v, so long as it was not @u.
- * Returns the old value of @v.
+ * Returns true iff @v was not @u.
  */
 static __inline__ int atomic64_add_unless(atomic64_t *v, long a, long u)
 {
-	long c, old;
-	c = atomic64_read(v);
-	for (;;) {
-		if (unlikely(c == (u)))
-			break;
-		old = atomic64_cmpxchg((v), c, c + (a));
-		if (likely(old == c))
-			break;
-		c = old;
-	}
-	return c != (u);
+	long c, tmp;
+	smp_mb();
+	__asm__ __volatile__(
+	"1:	ldq_l	%[tmp],%[mem]\n"
+	"	cmpeq	%[tmp],%[u],%[c]\n"
+	"	addq	%[tmp],%[a],%[tmp]\n"
+	"	bne	%[c],2f\n"
+	"	stq_c	%[tmp],%[mem]\n"
+	"	beq	%[tmp],3f\n"
+	"2:\n"
+	".subsection 2\n"
+	"3:	br	1b\n"
+	".previous"
+	: [tmp] "=&r"(tmp), [c] "=&r"(c)
+	: [mem] "m"(*v), [a] "rI"(a), [u] "rI"(u)
+	: "memory");
+	smp_mb();
+	return !c;
+}
+
+/*
+ * atomic64_dec_if_positive - decrement by 1 if old value positive
+ * @v: pointer of type atomic_t
+ *
+ * The function returns the old value of *v minus 1, even if
+ * the atomic variable, v, was not decremented.
+ */
+static inline long atomic64_dec_if_positive(atomic64_t *v)
+{
+	long old, tmp;
+	smp_mb();
+	__asm__ __volatile__(
+	"1:	ldq_l	%[old],%[mem]\n"
+	"	subq	%[old],1,%[tmp]\n"
+	"	ble	%[old],2f\n"
+	"	stq_c	%[tmp],%[mem]\n"
+	"	beq	%[tmp],3f\n"
+	"2:\n"
+	".subsection 2\n"
+	"3:	br	1b\n"
+	".previous"
+	: [old] "=&r"(old), [tmp] "=&r"(tmp)
+	: [mem] "m"(*v)
+	: "memory");
+	smp_mb();
+	return old - 1;
 }
 
 #define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0)

arch/alpha/include/asm/param.h

@@ -3,7 +3,9 @@
 
 #include <uapi/asm/param.h>
 
-#define HZ		CONFIG_HZ
-#define USER_HZ		HZ
-# define CLOCKS_PER_SEC	HZ	/* frequency at which times() counts */
+# undef HZ
+# define HZ		CONFIG_HZ
+# define USER_HZ	1024
+# define CLOCKS_PER_SEC	USER_HZ	/* frequency at which times() counts */
+
 #endif /* _ASM_ALPHA_PARAM_H */

arch/alpha/include/asm/spinlock.h

@@ -168,8 +168,4 @@ static inline void arch_write_unlock(arch_rwlock_t * lock)
 #define arch_read_lock_flags(lock, flags) arch_read_lock(lock)
 #define arch_write_lock_flags(lock, flags) arch_write_lock(lock)
 
-#define arch_spin_relax(lock)	cpu_relax()
-#define arch_read_relax(lock)	cpu_relax()
-#define arch_write_relax(lock)	cpu_relax()
-
 #endif /* _ALPHA_SPINLOCK_H */

arch/alpha/include/asm/unistd.h

@@ -3,8 +3,7 @@
 
 #include <uapi/asm/unistd.h>
 
-
-#define NR_SYSCALLS			506
+#define NR_SYSCALLS			508
 
 #define __ARCH_WANT_OLD_READDIR
 #define __ARCH_WANT_STAT64

arch/alpha/include/uapi/asm/param.h

 #ifndef _UAPI_ASM_ALPHA_PARAM_H
 #define _UAPI_ASM_ALPHA_PARAM_H
 
-/* ??? Gross.  I don't want to parameterize this, and supposedly the
-   hardware ignores reprogramming.  We also need userland buy-in to the 
-   change in HZ, since this is visible in the wait4 resources etc.  */
-
-#ifndef __KERNEL__
 #define HZ		1024
-#endif
 
 #define EXEC_PAGESIZE	8192
 
@@ -17,5 +11,4 @@
 
 #define MAXHOSTNAMELEN	64	/* max length of hostname */
 
-
 #endif /* _UAPI_ASM_ALPHA_PARAM_H */

arch/alpha/include/uapi/asm/unistd.h

@@ -467,5 +467,7 @@
 #define __NR_sendmmsg			503
 #define __NR_process_vm_readv		504
 #define __NR_process_vm_writev		505
+#define __NR_kcmp			506
+#define __NR_finit_module		507
 
 #endif /* _UAPI_ALPHA_UNISTD_H */

arch/alpha/kernel/irq_alpha.c

@@ -236,7 +236,7 @@ void __init
 init_rtc_irq(void)
 {
 	irq_set_chip_and_handler_name(RTC_IRQ, &dummy_irq_chip,
-				      handle_simple_irq, "RTC");
+				      handle_percpu_irq, "RTC");
 	setup_irq(RTC_IRQ, &timer_irqaction);
 }
 

arch/alpha/kernel/smp.c

@@ -264,9 +264,10 @@ recv_secondary_console_msg(void)
 		if (cnt <= 0 || cnt >= 80)
 			strcpy(buf, "<<< BOGUS MSG >>>");
 		else {
-			cp1 = (char *) &cpu->ipc_buffer[11];
+			cp1 = (char *) &cpu->ipc_buffer[1];
 			cp2 = buf;
-			strcpy(cp2, cp1);
+			memcpy(cp2, cp1, cnt);
+			cp2[cnt] = '\0';
 			
 			while ((cp2 = strchr(cp2, '\r')) != 0) {
 				*cp2 = ' ';

arch/alpha/kernel/sys_dp264.c

@@ -190,9 +190,6 @@ static struct irq_chip clipper_irq_type = {
 static void
 dp264_device_interrupt(unsigned long vector)
 {
-#if 1
-	printk("dp264_device_interrupt: NOT IMPLEMENTED YET!!\n");
-#else
 	unsigned long pld;
 	unsigned int i;
 
@@ -210,12 +207,7 @@ dp264_device_interrupt(unsigned long vector)
 			isa_device_interrupt(vector);
 		else
 			handle_irq(16 + i);
-#if 0
-		TSUNAMI_cchip->dir0.csr = 1UL << i; mb();
-		tmp = TSUNAMI_cchip->dir0.csr;
-#endif
 	}
-#endif
 }
 
 static void 

arch/alpha/kernel/sys_marvel.c

@@ -317,8 +317,9 @@ marvel_init_irq(void)
 }
 
 static int 
-marvel_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
+marvel_map_irq(const struct pci_dev *cdev, u8 slot, u8 pin)
 {
+	struct pci_dev *dev = (struct pci_dev *)cdev;
 	struct pci_controller *hose = dev->sysdata;
 	struct io7_port *io7_port = hose->sysdata;
 	struct io7 *io7 = io7_port->io7;

arch/alpha/kernel/systbls.S

@@ -524,6 +524,8 @@ sys_call_table:
 	.quad sys_sendmmsg
 	.quad sys_process_vm_readv
 	.quad sys_process_vm_writev		/* 505 */
+	.quad sys_kcmp
+	.quad sys_finit_module
 
 	.size sys_call_table, . - sys_call_table
 	.type sys_call_table, @object

arch/alpha/kernel/time.c

@@ -105,9 +105,7 @@ void arch_irq_work_raise(void)
 
 static inline __u32 rpcc(void)
 {
-    __u32 result;
-    asm volatile ("rpcc %0" : "=r"(result));
-    return result;
+	return __builtin_alpha_rpcc();
 }
 
 int update_persistent_clock(struct timespec now)

arch/alpha/kernel/traps.c

@@ -66,8 +66,8 @@ dik_show_regs(struct pt_regs *regs, unsigned long *r9_15)
 {
 	printk("pc = [<%016lx>]  ra = [<%016lx>]  ps = %04lx    %s\n",
 	       regs->pc, regs->r26, regs->ps, print_tainted());
-	print_symbol("pc is at %s\n", regs->pc);
-	print_symbol("ra is at %s\n", regs->r26 );
+	printk("pc is at %pSR\n", (void *)regs->pc);
+	printk("ra is at %pSR\n", (void *)regs->r26);
 	printk("v0 = %016lx  t0 = %016lx  t1 = %016lx\n",
 	       regs->r0, regs->r1, regs->r2);
 	printk("t2 = %016lx  t3 = %016lx  t4 = %016lx\n",
@@ -132,9 +132,7 @@ dik_show_trace(unsigned long *sp)
 			continue;
 		if (tmp >= (unsigned long) &_etext)
 			continue;
-		printk("[<%lx>]", tmp);
-		print_symbol(" %s", tmp);
-		printk("\n");
+		printk("[<%lx>] %pSR\n", tmp, (void *)tmp);
 		if (i > 40) {
 			printk(" ...");
 			break;

lib/mpi/longlong.h

@@ -151,15 +151,12 @@ do { \
 #endif /* __a29k__ */
 
 #if defined(__alpha) && W_TYPE_SIZE == 64
-#define umul_ppmm(ph, pl, m0, m1) \
-do { \
-		UDItype __m0 = (m0), __m1 = (m1); \
-		__asm__ ("umulh %r1,%2,%0" \
-		: "=r" ((UDItype) ph) \
-		: "%rJ" (__m0), \
-			"rI" (__m1)); \
-		(pl) = __m0 * __m1; \
-	} while (0)
+#define umul_ppmm(ph, pl, m0, m1)			\
+do {							\
+	UDItype __m0 = (m0), __m1 = (m1);		\
+	(ph) = __builtin_alpha_umulh(__m0, __m1);	\
+	(pl) = __m0 * __m1;                             \
+} while (0)
 #define UMUL_TIME 46
 #ifndef LONGLONG_STANDALONE
 #define udiv_qrnnd(q, r, n1, n0, d) \
@@ -167,7 +164,7 @@ do { UDItype __r; \
 	(q) = __udiv_qrnnd(&__r, (n1), (n0), (d)); \
 	(r) = __r; \
 } while (0)
-extern UDItype __udiv_qrnnd();
+extern UDItype __udiv_qrnnd(UDItype *, UDItype, UDItype, UDItype);
 #define UDIV_TIME 220
 #endif /* LONGLONG_STANDALONE */
 #endif /* __alpha */