11 files changed, 55 insertions, 28 deletions

diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 9155c9312c1e..c6be19e9ceae 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -116,6 +116,11 @@ ifeq ($(CONFIG_6xx),y)
 KBUILD_CFLAGS           += -mcpu=powerpc
 endif
 
+# Work around a gcc code-gen bug with -fno-omit-frame-pointer.
+ifeq ($(CONFIG_FTRACE),y)
+KBUILD_CFLAGS           += -mno-sched-epilog
+endif
+
 cpu-as-$(CONFIG_4xx)            += -Wa,-m405
 cpu-as-$(CONFIG_6xx)            += -Wa,-maltivec
 cpu-as-$(CONFIG_POWER4)         += -Wa,-maltivec
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 14174aa24074..717a3bc1352e 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -49,7 +49,7 @@ zlib       := inffast.c inflate.c inftrees.c
 zlibheader := inffast.h inffixed.h inflate.h inftrees.h infutil.h
 zliblinuxheader := zlib.h zconf.h zutil.h
 
-$(addprefix $(obj)/,$(zlib) gunzip_util.o main.o): \
+$(addprefix $(obj)/,$(zlib) cuboot-c2k.o gunzip_util.o main.o prpmc2800.o): \
         $(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader))
 
 src-libfdt := fdt.c fdt_ro.c fdt_wip.c fdt_sw.c fdt_rw.c fdt_strerror.c
diff --git a/arch/powerpc/include/asm/pgtable-ppc64.h b/arch/powerpc/include/asm/pgtable-ppc64.h
index db0b8f3b8807..4597c491e9b5 100644
--- a/arch/powerpc/include/asm/pgtable-ppc64.h
+++ b/arch/powerpc/include/asm/pgtable-ppc64.h
@@ -153,12 +153,10 @@
 #define __S110  PAGE_SHARED_X
 #define __S111  PAGE_SHARED_X
 
-#ifdef CONFIG_HUGETLB_PAGE
-
+#ifdef CONFIG_PPC_MM_SLICES
 #define HAVE_ARCH_UNMAPPED_AREA
 #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
-
-#endif
+#endif /* CONFIG_PPC_MM_SLICES */
 
 #ifndef __ASSEMBLY__
 
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 64f5948ebc9d..946daea780f1 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -14,12 +14,13 @@ endif
 
 ifdef CONFIG_FTRACE
 # Do not trace early boot code
-CFLAGS_REMOVE_cputable.o = -pg
-CFLAGS_REMOVE_prom_init.o = -pg
+CFLAGS_REMOVE_cputable.o = -pg -mno-sched-epilog
+CFLAGS_REMOVE_prom_init.o = -pg -mno-sched-epilog
+CFLAGS_REMOVE_btext.o = -pg -mno-sched-epilog
 
 ifdef CONFIG_DYNAMIC_FTRACE
 # dynamic ftrace setup.
-CFLAGS_REMOVE_ftrace.o = -pg
+CFLAGS_REMOVE_ftrace.o = -pg -mno-sched-epilog
 endif
 
 endif
diff --git a/arch/powerpc/kernel/align.c b/arch/powerpc/kernel/align.c
index 367129789cc0..5af4e9b2dbe2 100644
--- a/arch/powerpc/kernel/align.c
+++ b/arch/powerpc/kernel/align.c
@@ -647,7 +647,7 @@ static int emulate_vsx(unsigned char __user *addr, unsigned int reg,
                        unsigned int flags, unsigned int length)
 {
         char *ptr = (char *) &current->thread.TS_FPR(reg);
-        int ret;
+        int ret = 0;
 
         flush_vsx_to_thread(current);
 
diff --git a/arch/powerpc/kernel/idle_6xx.S b/arch/powerpc/kernel/idle_6xx.S
index 019b02d8844f..15c611de1ee2 100644
--- a/arch/powerpc/kernel/idle_6xx.S
+++ b/arch/powerpc/kernel/idle_6xx.S
@@ -158,7 +158,7 @@ _GLOBAL(power_save_ppc32_restore)
         stw     r9,_NIP(r11)            /* make it do a blr */
 
 #ifdef CONFIG_SMP
-        mfspr   r12,SPRN_SPRG3
+        rlwinm  r12,r11,0,0,31-THREAD_SHIFT
         lwz     r11,TI_CPU(r12)         /* get cpu number * 4 */
         slwi    r11,r11,2
 #else
diff --git a/arch/powerpc/kernel/idle_e500.S b/arch/powerpc/kernel/idle_e500.S
index 06304034b393..47a1a983ff88 100644
--- a/arch/powerpc/kernel/idle_e500.S
+++ b/arch/powerpc/kernel/idle_e500.S
@@ -84,10 +84,11 @@ _GLOBAL(power_save_ppc32_restore)
         stw     r9,_NIP(r11)            /* make it do a blr */
 
 #ifdef CONFIG_SMP
-        mfspr   r12,SPRN_SPRG3
+        rlwinm  r12,r1,0,0,31-THREAD_SHIFT
         lwz     r11,TI_CPU(r12)         /* get cpu number * 4 */
         slwi    r11,r11,2
 #else
         li      r11,0
 #endif
+
         b       transfer_to_handler_cont
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index 4a8ce62fe112..9f6c1ca1739e 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -66,11 +66,12 @@ SECTIONS
                 __got2_end = .;
 #endif /* CONFIG_PPC32 */
 
-                . = ALIGN(PAGE_SIZE);
-                _etext = .;
-                PROVIDE32 (etext = .);
         } :kernel
 
+        . = ALIGN(PAGE_SIZE);
+        _etext = .;
+        PROVIDE32 (etext = .);
+
         /* Read-only data */
         RODATA
 
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index 14be408dfc9b..8920eea34528 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -191,12 +191,17 @@ int htab_bolt_mapping(unsigned long vstart, unsigned long vend,
                 unsigned long hash, hpteg;
                 unsigned long vsid = get_kernel_vsid(vaddr, ssize);
                 unsigned long va = hpt_va(vaddr, vsid, ssize);
+                unsigned long tprot = prot;
+
+                /* Make kernel text executable */
+                if (in_kernel_text(vaddr))
+                        tprot &= ~HPTE_R_N;
 
                 hash = hpt_hash(va, shift, ssize);
                 hpteg = ((hash & htab_hash_mask) * HPTES_PER_GROUP);
 
                 BUG_ON(!ppc_md.hpte_insert);
-                ret = ppc_md.hpte_insert(hpteg, va, paddr, prot,
+                ret = ppc_md.hpte_insert(hpteg, va, paddr, tprot,
                                          HPTE_V_BOLTED, psize, ssize);
 
                 if (ret < 0)
@@ -584,7 +589,7 @@ void __init htab_initialize(void)
 {
         unsigned long table;
         unsigned long pteg_count;
-        unsigned long prot, tprot;
+        unsigned long prot;
         unsigned long base = 0, size = 0, limit;
         int i;
 
@@ -660,10 +665,9 @@ void __init htab_initialize(void)
         for (i=0; i < lmb.memory.cnt; i++) {
                 base = (unsigned long)__va(lmb.memory.region[i].base);
                 size = lmb.memory.region[i].size;
-                tprot = prot | (in_kernel_text(base) ? _PAGE_EXEC : 0);
 
                 DBG("creating mapping for region: %lx..%lx (prot: %x)\n",
-                    base, size, tprot);
+                    base, size, prot);
 
 #ifdef CONFIG_U3_DART
                 /* Do not map the DART space. Fortunately, it will be aligned
@@ -680,21 +684,21 @@ void __init htab_initialize(void)
                         unsigned long dart_table_end = dart_tablebase + 16 * MB;
                         if (base != dart_tablebase)
                                 BUG_ON(htab_bolt_mapping(base, dart_tablebase,
-                                                        __pa(base), tprot,
+                                                        __pa(base), prot,
                                                         mmu_linear_psize,
                                                         mmu_kernel_ssize));
                         if ((base + size) > dart_table_end)
                                 BUG_ON(htab_bolt_mapping(dart_tablebase+16*MB,
                                                         base + size,
                                                         __pa(dart_table_end),
-                                                         tprot,
+                                                         prot,
                                                          mmu_linear_psize,
                                                          mmu_kernel_ssize));
                         continue;
                 }
 #endif /* CONFIG_U3_DART */
                 BUG_ON(htab_bolt_mapping(base, base + size, __pa(base),
-                                tprot, mmu_linear_psize, mmu_kernel_ssize));
+                                prot, mmu_linear_psize, mmu_kernel_ssize));
        }
 
         /*
diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c
index 1c1b627ee843..67595bc380dc 100644
--- a/arch/powerpc/platforms/cell/spufs/sched.c
+++ b/arch/powerpc/platforms/cell/spufs/sched.c
@@ -643,9 +643,10 @@ static struct spu *find_victim(struct spu_context *ctx)
                             !(tmp->flags & SPU_CREATE_NOSCHED) &&
                             (!victim || tmp->prio > victim->prio)) {
                                 victim = spu->ctx;
-                                get_spu_context(victim);
                         }
                 }
+                if (victim)
+                        get_spu_context(victim);
                 mutex_unlock(&cbe_spu_info[node].list_mutex);
 
                 if (victim) {
@@ -727,17 +728,33 @@ static void spu_schedule(struct spu *spu, struct spu_context *ctx)
         /* not a candidate for interruptible because it's called either
            from the scheduler thread or from spu_deactivate */
         mutex_lock(&ctx->state_mutex);
-        __spu_schedule(spu, ctx);
+        if (ctx->state == SPU_STATE_SAVED)
+                __spu_schedule(spu, ctx);
         spu_release(ctx);
 }
 
-static void spu_unschedule(struct spu *spu, struct spu_context *ctx)
+/**
+ * spu_unschedule - remove a context from a spu, and possibly release it.
+ * @spu:        The SPU to unschedule from
+ * @ctx:        The context currently scheduled on the SPU
+ * @free_spu    Whether to free the SPU for other contexts
+ *
+ * Unbinds the context @ctx from the SPU @spu. If @free_spu is non-zero, the
+ * SPU is made available for other contexts (ie, may be returned by
+ * spu_get_idle). If this is zero, the caller is expected to schedule another
+ * context to this spu.
+ *
+ * Should be called with ctx->state_mutex held.
+ */
+static void spu_unschedule(struct spu *spu, struct spu_context *ctx,
+                int free_spu)
 {
         int node = spu->node;
 
         mutex_lock(&cbe_spu_info[node].list_mutex);
         cbe_spu_info[node].nr_active--;
-        spu->alloc_state = SPU_FREE;
+        if (free_spu)
+                spu->alloc_state = SPU_FREE;
         spu_unbind_context(spu, ctx);
         ctx->stats.invol_ctx_switch++;
         spu->stats.invol_ctx_switch++;
@@ -837,7 +854,7 @@ static int __spu_deactivate(struct spu_context *ctx, int force, int max_prio)
         if (spu) {
                 new = grab_runnable_context(max_prio, spu->node);
                 if (new || force) {
-                        spu_unschedule(spu, ctx);
+                        spu_unschedule(spu, ctx, new == NULL);
                         if (new) {
                                 if (new->flags & SPU_CREATE_NOSCHED)
                                         wake_up(&new->stop_wq);
@@ -910,7 +927,7 @@ static noinline void spusched_tick(struct spu_context *ctx)
 
         new = grab_runnable_context(ctx->prio + 1, spu->node);
         if (new) {
-                spu_unschedule(spu, ctx);
+                spu_unschedule(spu, ctx, 0);
                 if (test_bit(SPU_SCHED_SPU_RUN, &ctx->sched_flags))
                         spu_add_to_rq(ctx);
         } else {
diff --git a/arch/powerpc/platforms/powermac/Makefile b/arch/powerpc/platforms/powermac/Makefile
index 58ecdd72630f..be60d64be7ad 100644
--- a/arch/powerpc/platforms/powermac/Makefile
+++ b/arch/powerpc/platforms/powermac/Makefile
@@ -2,7 +2,7 @@ CFLAGS_bootx_init.o  		+= -fPIC
 
 ifdef CONFIG_FTRACE
 # Do not trace early boot code
-CFLAGS_REMOVE_bootx_init.o = -pg
+CFLAGS_REMOVE_bootx_init.o = -pg -mno-sched-epilog
 endif
 
 obj-y                           += pic.o setup.o time.o feature.o pci.o \