7 files changed, 26 insertions, 22 deletions

diff --git a/arch/powerpc/boot/flatdevtree.c b/arch/powerpc/boot/flatdevtree.c
index b732644788db..13761bf160c4 100644
--- a/arch/powerpc/boot/flatdevtree.c
+++ b/arch/powerpc/boot/flatdevtree.c
@@ -134,20 +134,6 @@ static char *ft_next(struct ft_cxt *cxt, char *p, struct ft_atom *ret)
 #define HDR_SIZE        _ALIGN(sizeof(struct boot_param_header), 8)
 #define EXPAND_INCR     1024    /* alloc this much extra when expanding */
 
-/* See if the regions are in the standard order and non-overlapping */
-static int ft_ordered(struct ft_cxt *cxt)
-{
-        char *p = (char *)cxt->bph + HDR_SIZE;
-        enum ft_rgn_id r;
-
-        for (r = FT_RSVMAP; r <= FT_STRINGS; ++r) {
-                if (p > cxt->rgn[r].start)
-                        return 0;
-                p = cxt->rgn[r].start + cxt->rgn[r].size;
-        }
-        return p <= (char *)cxt->bph + cxt->max_size;
-}
-
 /* Copy the tree to a newly-allocated region and put things in order */
 static int ft_reorder(struct ft_cxt *cxt, int nextra)
 {
@@ -573,10 +559,6 @@ int ft_open(struct ft_cxt *cxt, void *blob, unsigned int max_size,
         cxt->rgn[FT_STRUCT].size = struct_size(cxt);
         cxt->rgn[FT_STRINGS].start = blob + be32_to_cpu(bph->off_dt_strings);
         cxt->rgn[FT_STRINGS].size = be32_to_cpu(bph->dt_strings_size);
-        /* Leave as '0' to force first ft_make_space call to do a ft_reorder
-         * and move dt to an area allocated by realloc.
-        cxt->isordered = ft_ordered(cxt);
-        */
 
         cxt->p = cxt->rgn[FT_STRUCT].start;
         cxt->str_anchor = cxt->rgn[FT_STRINGS].start;
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index f39a72f30aad..b0cb2e662c25 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -81,6 +81,7 @@ obj-y				+= iomap.o
 endif
 
 ifeq ($(CONFIG_PPC_ISERIES),y)
+CFLAGS_lparmap.s                += -g0
 extra-y += lparmap.s
 $(obj)/head_64.o:       $(obj)/lparmap.s
 AFLAGS_head_64.o += -I$(obj)
diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index e708ab7ca9e8..8533de50347d 100644
--- a/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@ -301,9 +301,19 @@ _GLOBAL(_tlbie)
         mfspr   r4,SPRN_MMUCR
         mfspr   r5,SPRN_PID                     /* Get PID */
         rlwimi  r4,r5,0,24,31                   /* Set TID */
-        mtspr   SPRN_MMUCR,r4
 
+        /* We have to run the search with interrupts disabled, even critical
+         * and debug interrupts (in fact the only critical exceptions we have
+         * are debug and machine check).  Otherwise  an interrupt which causes
+         * a TLB miss can clobber the MMUCR between the mtspr and the tlbsx. */
+        mfmsr   r5
+        lis     r6,(MSR_EE|MSR_CE|MSR_ME|MSR_DE)@ha
+        addi    r6,r6,(MSR_EE|MSR_CE|MSR_ME|MSR_DE)@l
+        andc    r6,r5,r6
+        mtmsr   r6
+        mtspr   SPRN_MMUCR,r4
         tlbsx.  r3, 0, r3
+        mtmsr   r5
         bne     10f
         sync
         /* There are only 64 TLB entries, so r3 < 64,
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index f1789578747a..a47151e806ca 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -795,7 +795,7 @@ void hash_preload(struct mm_struct *mm, unsigned long ea,
 
 #ifdef CONFIG_PPC_MM_SLICES
         /* We only prefault standard pages for now */
-        if (unlikely(get_slice_psize(mm, ea) != mm->context.user_psize));
+        if (unlikely(get_slice_psize(mm, ea) != mm->context.user_psize))
                 return;
 #endif
 
diff --git a/arch/powerpc/platforms/cell/spu_syscalls.c b/arch/powerpc/platforms/cell/spu_syscalls.c
index dd2c6688c8aa..027ac32cc636 100644
--- a/arch/powerpc/platforms/cell/spu_syscalls.c
+++ b/arch/powerpc/platforms/cell/spu_syscalls.c
@@ -45,6 +45,7 @@ asmlinkage long sys_spu_create(const char __user *name,
         if (owner && try_module_get(owner)) {
                 if (flags & SPU_CREATE_AFFINITY_SPU) {
                         neighbor = fget_light(neighbor_fd, &fput_needed);
+                        ret = -EBADF;
                         if (neighbor) {
                                 ret = spufs_calls.create_thread(name, flags,
                                                                 mode, neighbor);
diff --git a/arch/powerpc/platforms/ps3/device-init.c b/arch/powerpc/platforms/ps3/device-init.c
index e23a5a874ad3..ce15cada88d4 100644
--- a/arch/powerpc/platforms/ps3/device-init.c
+++ b/arch/powerpc/platforms/ps3/device-init.c
@@ -372,7 +372,7 @@ static int ps3_storage_wait_for_device(const struct ps3_repository_device *repo)
                     notify_event->dev_type == repo->dev_type) {
                         pr_debug("%s:%u: device ready: dev_id %u\n", __func__,
                                  __LINE__, repo->dev_id);
-                        result = 0;
+                        error = 0;
                         break;
                 }
 
diff --git a/arch/ppc/kernel/misc.S b/arch/ppc/kernel/misc.S
index 0da55368655c..a22e1f4d94c8 100644
--- a/arch/ppc/kernel/misc.S
+++ b/arch/ppc/kernel/misc.S
@@ -237,9 +237,19 @@ _GLOBAL(_tlbie)
         mfspr   r4,SPRN_MMUCR
         mfspr   r5,SPRN_PID                     /* Get PID */
         rlwimi  r4,r5,0,24,31                   /* Set TID */
-        mtspr   SPRN_MMUCR,r4
 
+        /* We have to run the search with interrupts disabled, even critical
+         * and debug interrupts (in fact the only critical exceptions we have
+         * are debug and machine check).  Otherwise  an interrupt which causes
+         * a TLB miss can clobber the MMUCR between the mtspr and the tlbsx. */
+        mfmsr   r5
+        lis     r6,(MSR_EE|MSR_CE|MSR_ME|MSR_DE)@ha
+        addi    r6,r6,(MSR_EE|MSR_CE|MSR_ME|MSR_DE)@l
+        andc    r6,r5,r6
+        mtmsr   r6
+        mtspr   SPRN_MMUCR,r4
         tlbsx.  r3, 0, r3
+        mtmsr   r5
         bne     10f
         sync
         /* There are only 64 TLB entries, so r3 < 64,