Merge branch 'parisc-5.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

Pull parisc fixes from Helge Deller:

 - Fix crashes when accessing PCI devices on some machines like C240 and
   J5000. The crashes were triggered because we replaced cache flushes
   by nops in the alternative coding where we shouldn't for some
   machines.

 - Dave fixed a race in the usage of the sr1 space register when used to
   load the coherence index.

 - Use the hardware lpa instruction to to load the physical address of
   kernel virtual addresses in the iommu driver code.

 - The kernel may fail to link when CONFIG_MLONGCALLS isn't set. Solve
   that by rearranging functions in the final vmlinux executeable.

 - Some defconfig cleanups and removal of compiler warnings.

* 'parisc-5.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Fix crash due alternative coding for NP iopdir_fdc bit
  parisc: Use lpa instruction to load physical addresses in driver code
  parisc: configs: Remove useless UEVENT_HELPER_PATH
  parisc: Use implicit space register selection for loading the coherence index of I/O pdirs
  parisc: Fix compiler warnings in float emulation code
  parisc/slab: cleanup after /proc/slab_allocators removal
  parisc: Allow building 64-bit kernel without -mlong-calls compiler option
  parisc: Kconfig: remove ARCH_DISCARD_MEMBLOCK

arch/parisc/Kconfig

@@ -36,7 +36,6 @@ config PARISC
 	select GENERIC_STRNCPY_FROM_USER
 	select SYSCTL_ARCH_UNALIGN_ALLOW
 	select SYSCTL_EXCEPTION_TRACE
-	select ARCH_DISCARD_MEMBLOCK
 	select HAVE_MOD_ARCH_SPECIFIC
 	select VIRT_TO_BUS
 	select MODULES_USE_ELF_RELA
@@ -195,7 +194,8 @@ config PREFETCH
 
 config MLONGCALLS
 	bool "Enable the -mlong-calls compiler option for big kernels"
-	default y
+	default y if !MODULES || UBSAN || FTRACE
+	default n
 	depends on PA8X00
 	help
 	  If you configure the kernel to include many drivers built-in instead

arch/parisc/configs/712_defconfig

@@ -34,7 +34,6 @@ CONFIG_INET_DIAG=m
 CONFIG_NETFILTER=y
 CONFIG_LLC2=m
 CONFIG_NET_PKTGEN=m
-CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 # CONFIG_STANDALONE is not set

arch/parisc/configs/a500_defconfig

@@ -70,7 +70,6 @@ CONFIG_IP_DCCP=m
 # CONFIG_IP_DCCP_CCID3 is not set
 CONFIG_LLC2=m
 CONFIG_NET_PKTGEN=m
-CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 # CONFIG_STANDALONE is not set

arch/parisc/configs/b180_defconfig

@@ -24,7 +24,6 @@ CONFIG_INET=y
 CONFIG_IP_MULTICAST=y
 CONFIG_IP_PNP=y
 CONFIG_IP_PNP_BOOTP=y
-CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 # CONFIG_PREVENT_FIRMWARE_BUILD is not set

arch/parisc/configs/c3000_defconfig

@@ -32,7 +32,6 @@ CONFIG_INET6_IPCOMP=m
 CONFIG_IPV6_TUNNEL=m
 CONFIG_NETFILTER=y
 CONFIG_NET_PKTGEN=m
-CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 # CONFIG_STANDALONE is not set

arch/parisc/configs/c8000_defconfig

@@ -57,7 +57,6 @@ CONFIG_IP_DCCP=m
 CONFIG_TIPC=m
 CONFIG_LLC2=m
 CONFIG_DNS_RESOLVER=y
-CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 # CONFIG_STANDALONE is not set

arch/parisc/configs/default_defconfig

@@ -44,7 +44,6 @@ CONFIG_INET6_AH=y
 CONFIG_INET6_ESP=y
 CONFIG_INET6_IPCOMP=y
 CONFIG_LLC2=m
-CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 # CONFIG_STANDALONE is not set

arch/parisc/configs/generic-32bit_defconfig

@@ -47,7 +47,6 @@ CONFIG_INET_ESP=m
 CONFIG_INET_DIAG=m
 CONFIG_LLC2=m
 # CONFIG_WIRELESS is not set
-CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 # CONFIG_STANDALONE is not set

arch/parisc/include/asm/special_insns.h

@@ -2,6 +2,30 @@
 #ifndef __PARISC_SPECIAL_INSNS_H
 #define __PARISC_SPECIAL_INSNS_H
 
+#define lpa(va)	({			\
+	unsigned long pa;		\
+	__asm__ __volatile__(		\
+		"copy %%r0,%0\n\t"	\
+		"lpa %%r0(%1),%0"	\
+		: "=r" (pa)		\
+		: "r" (va)		\
+		: "memory"		\
+	);				\
+	pa;				\
+})
+
+#define lpa_user(va)	({		\
+	unsigned long pa;		\
+	__asm__ __volatile__(		\
+		"copy %%r0,%0\n\t"	\
+		"lpa %%r0(%%sr3,%1),%0"	\
+		: "=r" (pa)		\
+		: "r" (va)		\
+		: "memory"		\
+	);				\
+	pa;				\
+})
+
 #define mfctl(reg)	({		\
 	unsigned long cr;		\
 	__asm__ __volatile__(		\

arch/parisc/kernel/alternative.c

@@ -56,7 +56,8 @@ void __init_or_module apply_alternatives(struct alt_instr *start,
 		 * time IO-PDIR is changed in Ike/Astro.
 		 */
 		if ((cond & ALT_COND_NO_IOC_FDC) &&
-			(boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC))
+			((boot_cpu_data.cpu_type <= pcxw_) ||
+			 (boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC)))
 			continue;
 
 		/* Want to replace pdtlb by a pdtlb,l instruction? */

arch/parisc/kernel/vmlinux.lds.S

@@ -35,6 +35,15 @@ OUTPUT_FORMAT("elf64-hppa-linux")
 OUTPUT_ARCH(hppa:hppa2.0w)
 #endif
 
+#define EXIT_TEXT_SECTIONS()	.exit.text : { EXIT_TEXT }
+#if !defined(CONFIG_64BIT) || defined(CONFIG_MLONGCALLS)
+#define MLONGCALL_KEEP(x)
+#define MLONGCALL_DISCARD(x)	x
+#else
+#define MLONGCALL_KEEP(x)	x
+#define MLONGCALL_DISCARD(x)
+#endif
+
 ENTRY(parisc_kernel_start)
 #ifndef CONFIG_64BIT
 jiffies = jiffies_64 + 4;
@@ -47,15 +56,11 @@ SECTIONS
 
 	__init_begin = .;
 	HEAD_TEXT_SECTION
-	INIT_TEXT_SECTION(8)
+	MLONGCALL_DISCARD(INIT_TEXT_SECTION(8))
 
 	. = ALIGN(PAGE_SIZE);
 	INIT_DATA_SECTION(PAGE_SIZE)
-	/* we have to discard exit text and such at runtime, not link time */
-	.exit.text :
-	{
-		EXIT_TEXT
-	}
+	MLONGCALL_DISCARD(EXIT_TEXT_SECTIONS())
 	.exit.data :
 	{
 		EXIT_DATA
@@ -73,11 +78,12 @@ SECTIONS
 
 	_text = .;		/* Text and read-only data */
 	_stext = .;
+	MLONGCALL_KEEP(INIT_TEXT_SECTION(8))
 	.text ALIGN(PAGE_SIZE) : {
 		TEXT_TEXT
+		LOCK_TEXT
 		SCHED_TEXT
 		CPUIDLE_TEXT
-		LOCK_TEXT
 		KPROBES_TEXT
 		IRQENTRY_TEXT
 		SOFTIRQENTRY_TEXT
@@ -92,6 +98,7 @@ SECTIONS
 		*(.lock.text)		/* out-of-line lock text */
 		*(.gnu.warning)
 	}
+	MLONGCALL_KEEP(EXIT_TEXT_SECTIONS())
 	. = ALIGN(PAGE_SIZE);
 	_etext = .;
 	/* End of text section */

arch/parisc/math-emu/cnv_float.h

@@ -47,19 +47,19 @@
     ((exponent < (SGL_P - 1)) ?				\
      (Sall(sgl_value) << (SGL_EXP_LENGTH + 1 + exponent)) : FALSE)
 
-#define Int_isinexact_to_sgl(int_value)	(int_value << 33 - SGL_EXP_LENGTH)
+#define Int_isinexact_to_sgl(int_value)	((int_value << 33 - SGL_EXP_LENGTH) != 0)
 
 #define Sgl_roundnearest_from_int(int_value,sgl_value)			\
     if (int_value & 1<<(SGL_EXP_LENGTH - 2))   /* round bit */		\
-    	if ((int_value << 34 - SGL_EXP_LENGTH) || Slow(sgl_value))	\
+	if (((int_value << 34 - SGL_EXP_LENGTH) != 0) || Slow(sgl_value)) \
 		Sall(sgl_value)++
 
 #define Dint_isinexact_to_sgl(dint_valueA,dint_valueB)		\
-    ((Dintp1(dint_valueA) << 33 - SGL_EXP_LENGTH) || Dintp2(dint_valueB))
+    (((Dintp1(dint_valueA) << 33 - SGL_EXP_LENGTH) != 0) || Dintp2(dint_valueB))
 
 #define Sgl_roundnearest_from_dint(dint_valueA,dint_valueB,sgl_value)	\
     if (Dintp1(dint_valueA) & 1<<(SGL_EXP_LENGTH - 2)) 			\
-    	if ((Dintp1(dint_valueA) << 34 - SGL_EXP_LENGTH) ||		\
+	if (((Dintp1(dint_valueA) << 34 - SGL_EXP_LENGTH) != 0) ||	\
     	Dintp2(dint_valueB) || Slow(sgl_value)) Sall(sgl_value)++
 
 #define Dint_isinexact_to_dbl(dint_value) 	\

drivers/parisc/ccio-dma.c

@@ -562,14 +562,12 @@ ccio_io_pdir_entry(u64 *pdir_ptr, space_t sid, unsigned long vba,
 	/* We currently only support kernel addresses */
 	BUG_ON(sid != KERNEL_SPACE);
 
-	mtsp(sid,1);
-
 	/*
 	** WORD 1 - low order word
 	** "hints" parm includes the VALID bit!
 	** "dep" clobbers the physical address offset bits as well.
 	*/
-	pa = virt_to_phys(vba);
+	pa = lpa(vba);
 	asm volatile("depw  %1,31,12,%0" : "+r" (pa) : "r" (hints));
 	((u32 *)pdir_ptr)[1] = (u32) pa;
 
@@ -594,7 +592,7 @@ ccio_io_pdir_entry(u64 *pdir_ptr, space_t sid, unsigned long vba,
 	** Grab virtual index [0:11]
 	** Deposit virt_idx bits into I/O PDIR word
 	*/
-	asm volatile ("lci %%r0(%%sr1, %1), %0" : "=r" (ci) : "r" (vba));
+	asm volatile ("lci %%r0(%1), %0" : "=r" (ci) : "r" (vba));
 	asm volatile ("extru %1,19,12,%0" : "+r" (ci) : "r" (ci));
 	asm volatile ("depw  %1,15,12,%0" : "+r" (pa) : "r" (ci));
 

drivers/parisc/sba_iommu.c

@@ -569,11 +569,10 @@ sba_io_pdir_entry(u64 *pdir_ptr, space_t sid, unsigned long vba,
 	u64 pa; /* physical address */
 	register unsigned ci; /* coherent index */
 
-	pa = virt_to_phys(vba);
+	pa = lpa(vba);
 	pa &= IOVP_MASK;
 
-	mtsp(sid,1);
-	asm("lci 0(%%sr1, %1), %0" : "=r" (ci) : "r" (vba));
+	asm("lci 0(%1), %0" : "=r" (ci) : "r" (vba));
 	pa |= (ci >> PAGE_SHIFT) & 0xff;  /* move CI (8 bits) into lowest byte */
 
 	pa |= SBA_PDIR_VALID_BIT;	/* set "valid" bit */