Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
  [POWERPC] Silence an annoying boot message
  [POWERPC] Fix early btext debug on PowerMac
  [POWERPC] Demote clockevent printk to KERN_DEBUG
  [POWERPC] Fix CONFIG_SMP=n build error on ppc64
  [POWERPC] Avoid unpaired stwcx. on some processors
  [POWERPC] Fix oops related to 4xx flush_tlb_page modification
  [POWERPC] cpm: Fix a couple minor issues in cpm_common.c.
  [POWERPC] Add -mno-spe for ARCH=powerpc builds

10 files changed, 38 insertions, 31 deletions

diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 4e165342210a..bd87626c1f60 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -107,6 +107,9 @@ endif
 # No AltiVec instruction when building kernel
 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
 
+# No SPE instruction when building kernel
+KBUILD_CFLAGS += $(call cc-option,-mno-spe)
+
 # Enable unit-at-a-time mode when possible. It shrinks the
 # kernel considerably.
 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
diff --git a/arch/powerpc/kernel/btext.c b/arch/powerpc/kernel/btext.c
index 3ef51fb6f107..9c74fdf29eec 100644
--- a/arch/powerpc/kernel/btext.c
+++ b/arch/powerpc/kernel/btext.c
@@ -186,7 +186,9 @@ int btext_initialize(struct device_node *np)
                 pitch = *prop;
         if (pitch == 1)
                 pitch = 0x1000;
-        prop = of_get_property(np, "address", NULL);
+        prop = of_get_property(np, "linux,bootx-addr", NULL);
+        if (prop == NULL)
+                prop = of_get_property(np, "address", NULL);
         if (prop)
                 address = *prop;
 
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index a7572cf464bd..69a91bd46115 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -251,6 +251,9 @@ syscall_exit_cont:
         bne-    2f
 1:
 #endif /* CONFIG_44x */
+BEGIN_FTR_SECTION
+        lwarx   r7,0,r1
+END_FTR_SECTION_IFSET(CPU_FTR_NEED_PAIRED_STWCX)
         stwcx.  r0,0,r1                 /* to clear the reservation */
         lwz     r4,_LINK(r1)
         lwz     r5,_CCR(r1)
@@ -717,6 +720,9 @@ restore:
         mtctr   r11
 
         PPC405_ERR77(0,r1)
+BEGIN_FTR_SECTION
+        lwarx   r11,0,r1
+END_FTR_SECTION_IFSET(CPU_FTR_NEED_PAIRED_STWCX)
         stwcx.  r0,0,r1                 /* to clear the reservation */
 
 #if !(defined(CONFIG_4xx) || defined(CONFIG_BOOKE))
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 4beb6329dfb7..c0d77723ba11 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -829,7 +829,7 @@ static void register_decrementer_clockevent(int cpu)
         *dec = decrementer_clockevent;
         dec->cpumask = cpumask_of_cpu(cpu);
 
-        printk(KERN_INFO "clockevent: %s mult[%lx] shift[%d] cpu[%d]\n",
+        printk(KERN_DEBUG "clockevent: %s mult[%lx] shift[%d] cpu[%d]\n",
                dec->name, dec->mult, dec->shift, cpu);
 
         clockevents_register_device(dec);
diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c
index d9c82d3d6482..c0f5cff77035 100644
--- a/arch/powerpc/mm/init_64.c
+++ b/arch/powerpc/mm/init_64.c
@@ -19,8 +19,6 @@
  *
  */
 
-#undef DEBUG
-
 #include <linux/signal.h>
 #include <linux/sched.h>
 #include <linux/kernel.h>
@@ -66,12 +64,6 @@
 
 #include "mmu_decl.h"
 
-#ifdef DEBUG
-#define DBG(fmt...) printk(fmt)
-#else
-#define DBG(fmt...)
-#endif
-
 #if PGTABLE_RANGE > USER_VSID_RANGE
 #warning Limited user VSID range means pagetable space is wasted
 #endif
@@ -175,8 +167,8 @@ void pgtable_cache_init(void)
                 int size = pgtable_cache_size[i];
                 const char *name = pgtable_cache_name[i];
 
-                DBG("Allocating page table cache %s (#%d) "
-                    "for size: %08x...\n", name, i, size);
+                pr_debug("Allocating page table cache %s (#%d) "
+                        "for size: %08x...\n", name, i, size);
                 pgtable_cache[i] = kmem_cache_create(name,
                                                      size, size,
                                                      SLAB_PANIC,
@@ -239,8 +231,8 @@ int __meminit vmemmap_populate(struct page *start_page,
                 if (!p)
                         return -ENOMEM;
 
-                printk(KERN_WARNING "vmemmap %08lx allocated at %p, "
-                                    "physical %08lx.\n", start, p, __pa(p));
+                pr_debug("vmemmap %08lx allocated at %p, physical %08lx.\n",
+                        start, p, __pa(p));
 
                 mapped = htab_bolt_mapping(start, start + page_size,
                                         __pa(p), mode_rw, mmu_linear_psize,
diff --git a/arch/powerpc/mm/tlb_64.c b/arch/powerpc/mm/tlb_64.c
index eafbca52bff9..e2d867ce1c7e 100644
--- a/arch/powerpc/mm/tlb_64.c
+++ b/arch/powerpc/mm/tlb_64.c
@@ -54,12 +54,10 @@ unsigned long pte_freelist_forced_free;
         ((PAGE_SIZE - sizeof(struct pte_freelist_batch)) \
           / sizeof(pgtable_free_t))
 
-#ifdef CONFIG_SMP
 static void pte_free_smp_sync(void *arg)
 {
         /* Do nothing, just ensure we sync with all CPUs */
 }
-#endif
 
 /* This is only called when we are critically out of memory
  * (and fail to get a page in pte_free_tlb).
diff --git a/arch/powerpc/sysdev/cpm_common.c b/arch/powerpc/sysdev/cpm_common.c
index 66c8ad4cfce6..165981c87786 100644
--- a/arch/powerpc/sysdev/cpm_common.c
+++ b/arch/powerpc/sysdev/cpm_common.c
@@ -77,8 +77,6 @@ int __init cpm_muram_init(void)
         int i = 0;
         int ret = 0;
 
-        printk("cpm_muram_init\n");
-
         spin_lock_init(&cpm_muram_lock);
         /* initialize the info header */
         rh_init(&cpm_muram_info, 1,
@@ -193,7 +191,7 @@ void __iomem *cpm_muram_addr(unsigned long offset)
 EXPORT_SYMBOL(cpm_muram_addr);
 
 /**
- * cpm_muram_phys - turn a muram virtual address into a DMA address
+ * cpm_muram_dma - turn a muram virtual address into a DMA address
  * @offset: virtual address from cpm_muram_addr() to convert
  */
 dma_addr_t cpm_muram_dma(void __iomem *addr)
diff --git a/arch/ppc/kernel/entry.S b/arch/ppc/kernel/entry.S
index b19bfef2034d..59e77eb63338 100644
--- a/arch/ppc/kernel/entry.S
+++ b/arch/ppc/kernel/entry.S
@@ -251,6 +251,9 @@ syscall_exit_cont:
         bne-    2f
 1:
 #endif /* CONFIG_44x */
+BEGIN_FTR_SECTION
+        lwarx   r7,0,r1
+END_FTR_SECTION_IFSET(CPU_FTR_NEED_PAIRED_STWCX)
         stwcx.  r0,0,r1                 /* to clear the reservation */
         lwz     r4,_LINK(r1)
         lwz     r5,_CCR(r1)
@@ -713,6 +716,9 @@ restore:
         mtctr   r11
 
         PPC405_ERR77(0,r1)
+BEGIN_FTR_SECTION
+        lwarx   r11,0,r1
+END_FTR_SECTION_IFSET(CPU_FTR_NEED_PAIRED_STWCX)
         stwcx.  r0,0,r1                 /* to clear the reservation */
 
 #if !(defined(CONFIG_4xx) || defined(CONFIG_BOOKE))
diff --git a/include/asm-powerpc/cputable.h b/include/asm-powerpc/cputable.h
index 9d74338e3dec..4525c784dfd0 100644
--- a/include/asm-powerpc/cputable.h
+++ b/include/asm-powerpc/cputable.h
@@ -138,6 +138,7 @@ extern void do_feature_fixups(unsigned long value, void *fixup_start,
 #define CPU_FTR_FPU_UNAVAILABLE         ASM_CONST(0x0000000000800000)
 #define CPU_FTR_UNIFIED_ID_CACHE        ASM_CONST(0x0000000001000000)
 #define CPU_FTR_SPE                     ASM_CONST(0x0000000002000000)
+#define CPU_FTR_NEED_PAIRED_STWCX       ASM_CONST(0x0000000004000000)
 
 /*
  * Add the 64-bit processor unique features in the top half of the word;
@@ -261,25 +262,25 @@ extern void do_feature_fixups(unsigned long value, void *fixup_start,
 #define CPU_FTRS_7450_20        (CPU_FTR_COMMON | \
             CPU_FTR_USE_TB | CPU_FTR_L2CR | CPU_FTR_ALTIVEC_COMP | \
             CPU_FTR_L3CR | CPU_FTR_HPTE_TABLE | CPU_FTR_SPEC7450 | \
-            CPU_FTR_NEED_COHERENT | CPU_FTR_PPC_LE)
+            CPU_FTR_NEED_COHERENT | CPU_FTR_PPC_LE | CPU_FTR_NEED_PAIRED_STWCX)
 #define CPU_FTRS_7450_21        (CPU_FTR_COMMON | \
             CPU_FTR_USE_TB | \
             CPU_FTR_MAYBE_CAN_NAP | CPU_FTR_L2CR | CPU_FTR_ALTIVEC_COMP | \
             CPU_FTR_L3CR | CPU_FTR_HPTE_TABLE | CPU_FTR_SPEC7450 | \
             CPU_FTR_NAP_DISABLE_L2_PR | CPU_FTR_L3_DISABLE_NAP | \
-            CPU_FTR_NEED_COHERENT | CPU_FTR_PPC_LE)
+            CPU_FTR_NEED_COHERENT | CPU_FTR_PPC_LE | CPU_FTR_NEED_PAIRED_STWCX)
 #define CPU_FTRS_7450_23        (CPU_FTR_COMMON | \
-            CPU_FTR_USE_TB | \
+            CPU_FTR_USE_TB | CPU_FTR_NEED_PAIRED_STWCX | \
             CPU_FTR_MAYBE_CAN_NAP | CPU_FTR_L2CR | CPU_FTR_ALTIVEC_COMP | \
             CPU_FTR_L3CR | CPU_FTR_HPTE_TABLE | CPU_FTR_SPEC7450 | \
             CPU_FTR_NAP_DISABLE_L2_PR | CPU_FTR_NEED_COHERENT | CPU_FTR_PPC_LE)
 #define CPU_FTRS_7455_1 (CPU_FTR_COMMON | \
-            CPU_FTR_USE_TB | \
+            CPU_FTR_USE_TB | CPU_FTR_NEED_PAIRED_STWCX | \
             CPU_FTR_L2CR | CPU_FTR_ALTIVEC_COMP | CPU_FTR_L3CR | \
             CPU_FTR_HPTE_TABLE | CPU_FTR_SPEC7450 | CPU_FTR_HAS_HIGH_BATS | \
             CPU_FTR_NEED_COHERENT | CPU_FTR_PPC_LE)
 #define CPU_FTRS_7455_20        (CPU_FTR_COMMON | \
-            CPU_FTR_USE_TB | \
+            CPU_FTR_USE_TB | CPU_FTR_NEED_PAIRED_STWCX | \
             CPU_FTR_MAYBE_CAN_NAP | CPU_FTR_L2CR | CPU_FTR_ALTIVEC_COMP | \
             CPU_FTR_L3CR | CPU_FTR_HPTE_TABLE | CPU_FTR_SPEC7450 | \
             CPU_FTR_NAP_DISABLE_L2_PR | CPU_FTR_L3_DISABLE_NAP | \
@@ -289,31 +290,32 @@ extern void do_feature_fixups(unsigned long value, void *fixup_start,
             CPU_FTR_MAYBE_CAN_NAP | CPU_FTR_L2CR | CPU_FTR_ALTIVEC_COMP | \
             CPU_FTR_L3CR | CPU_FTR_HPTE_TABLE | CPU_FTR_SPEC7450 | \
             CPU_FTR_NAP_DISABLE_L2_PR | CPU_FTR_HAS_HIGH_BATS | \
-            CPU_FTR_NEED_COHERENT | CPU_FTR_PPC_LE)
+            CPU_FTR_NEED_COHERENT | CPU_FTR_PPC_LE | CPU_FTR_NEED_PAIRED_STWCX)
 #define CPU_FTRS_7447_10        (CPU_FTR_COMMON | \
             CPU_FTR_USE_TB | \
             CPU_FTR_MAYBE_CAN_NAP | CPU_FTR_L2CR | CPU_FTR_ALTIVEC_COMP | \
             CPU_FTR_L3CR | CPU_FTR_HPTE_TABLE | CPU_FTR_SPEC7450 | \
             CPU_FTR_NAP_DISABLE_L2_PR | CPU_FTR_HAS_HIGH_BATS | \
-            CPU_FTR_NEED_COHERENT | CPU_FTR_NO_BTIC | CPU_FTR_PPC_LE)
+            CPU_FTR_NEED_COHERENT | CPU_FTR_NO_BTIC | CPU_FTR_PPC_LE | \
+            CPU_FTR_NEED_PAIRED_STWCX)
 #define CPU_FTRS_7447   (CPU_FTR_COMMON | \
             CPU_FTR_USE_TB | \
             CPU_FTR_MAYBE_CAN_NAP | CPU_FTR_L2CR | CPU_FTR_ALTIVEC_COMP | \
             CPU_FTR_L3CR | CPU_FTR_HPTE_TABLE | CPU_FTR_SPEC7450 | \
             CPU_FTR_NAP_DISABLE_L2_PR | CPU_FTR_HAS_HIGH_BATS | \
-            CPU_FTR_NEED_COHERENT | CPU_FTR_PPC_LE)
+            CPU_FTR_NEED_COHERENT | CPU_FTR_PPC_LE | CPU_FTR_NEED_PAIRED_STWCX)
 #define CPU_FTRS_7447A  (CPU_FTR_COMMON | \
             CPU_FTR_USE_TB | \
             CPU_FTR_MAYBE_CAN_NAP | CPU_FTR_L2CR | CPU_FTR_ALTIVEC_COMP | \
             CPU_FTR_HPTE_TABLE | CPU_FTR_SPEC7450 | \
             CPU_FTR_NAP_DISABLE_L2_PR | CPU_FTR_HAS_HIGH_BATS | \
-            CPU_FTR_NEED_COHERENT | CPU_FTR_PPC_LE)
+            CPU_FTR_NEED_COHERENT | CPU_FTR_PPC_LE | CPU_FTR_NEED_PAIRED_STWCX)
 #define CPU_FTRS_7448   (CPU_FTR_COMMON | \
             CPU_FTR_USE_TB | \
             CPU_FTR_MAYBE_CAN_NAP | CPU_FTR_L2CR | CPU_FTR_ALTIVEC_COMP | \
             CPU_FTR_HPTE_TABLE | CPU_FTR_SPEC7450 | \
             CPU_FTR_NAP_DISABLE_L2_PR | CPU_FTR_HAS_HIGH_BATS | \
-            CPU_FTR_PPC_LE)
+            CPU_FTR_PPC_LE | CPU_FTR_NEED_PAIRED_STWCX)
 #define CPU_FTRS_82XX   (CPU_FTR_COMMON | \
             CPU_FTR_MAYBE_CAN_DOZE | CPU_FTR_USE_TB)
 #define CPU_FTRS_G2_LE  (CPU_FTR_COMMON | CPU_FTR_MAYBE_CAN_DOZE | \
diff --git a/include/asm-powerpc/tlbflush.h b/include/asm-powerpc/tlbflush.h
index e7b4c0d298ae..5c9108147644 100644
--- a/include/asm-powerpc/tlbflush.h
+++ b/include/asm-powerpc/tlbflush.h
@@ -44,13 +44,13 @@ static inline void flush_tlb_mm(struct mm_struct *mm)
 static inline void flush_tlb_page(struct vm_area_struct *vma,
                                   unsigned long vmaddr)
 {
-        _tlbie(vmaddr, vma->vm_mm->context.id);
+        _tlbie(vmaddr, vma ? vma->vm_mm->context.id : 0);
 }
 
 static inline void flush_tlb_page_nohash(struct vm_area_struct *vma,
                                          unsigned long vmaddr)
 {
-        _tlbie(vmaddr, vma->vm_mm->context.id);
+        _tlbie(vmaddr, vma ? vma->vm_mm->context.id : 0);
 }
 
 static inline void flush_tlb_range(struct vm_area_struct *vma,