Merge branch 'master'

18 files changed, 56 insertions, 34 deletions

diff --git a/arch/arm/mm/abort-ev6.S b/arch/arm/mm/abort-ev6.S
index 8f76f3df7b4c..dbd346033122 100644
--- a/arch/arm/mm/abort-ev6.S
+++ b/arch/arm/mm/abort-ev6.S
@@ -20,6 +20,11 @@
  */
         .align  5
 ENTRY(v6_early_abort)
+#ifdef CONFIG_CPU_MPCORE
+        clrex
+#else
+        strex   r0, r1, [sp]                    @ Clear the exclusive monitor
+#endif
         mrc     p15, 0, r1, c5, c0, 0           @ get FSR
         mrc     p15, 0, r0, c6, c0, 0           @ get FAR
 /*
diff --git a/arch/arm/mm/cache-v6.S b/arch/arm/mm/cache-v6.S
index 85c10a71e7c6..72966d90e956 100644
--- a/arch/arm/mm/cache-v6.S
+++ b/arch/arm/mm/cache-v6.S
@@ -18,6 +18,7 @@
 #define HARVARD_CACHE
 #define CACHE_LINE_SIZE         32
 #define D_CACHE_LINE_SIZE       32
+#define BTB_FLUSH_SIZE          8
 
 /*
  *      v6_flush_cache_all()
@@ -98,7 +99,13 @@ ENTRY(v6_coherent_user_range)
         mcr     p15, 0, r0, c7, c5, 1           @ invalidate I line
 #endif
         mcr     p15, 0, r0, c7, c5, 7           @ invalidate BTB entry
-        add     r0, r0, #CACHE_LINE_SIZE
+        add     r0, r0, #BTB_FLUSH_SIZE
+        mcr     p15, 0, r0, c7, c5, 7           @ invalidate BTB entry
+        add     r0, r0, #BTB_FLUSH_SIZE
+        mcr     p15, 0, r0, c7, c5, 7           @ invalidate BTB entry
+        add     r0, r0, #BTB_FLUSH_SIZE
+        mcr     p15, 0, r0, c7, c5, 7           @ invalidate BTB entry
+        add     r0, r0, #BTB_FLUSH_SIZE
         cmp     r0, r1
         blo     1b
 #ifdef HARVARD_CACHE
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index 0b6c4db44e08..4a884baf3b9c 100644
--- a/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c
@@ -233,7 +233,17 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
         if (in_interrupt() || !mm)
                 goto no_context;
 
-        down_read(&mm->mmap_sem);
+        /*
+         * As per x86, we may deadlock here.  However, since the kernel only
+         * validly references user space from well defined areas of the code,
+         * we can bug out early if this is from code which shouldn't.
+         */
+        if (!down_read_trylock(&mm->mmap_sem)) {
+                if (!user_mode(regs) && !search_exception_tables(regs->ARM_pc))
+                        goto no_context;
+                down_read(&mm->mmap_sem);
+        }
+
         fault = __do_page_fault(mm, addr, fsr, tsk);
         up_read(&mm->mmap_sem);
 
diff --git a/arch/arm/mm/flush.c b/arch/arm/mm/flush.c
index b0208c992576..c9a03981b785 100644
--- a/arch/arm/mm/flush.c
+++ b/arch/arm/mm/flush.c
@@ -17,6 +17,24 @@
 
 #ifdef CONFIG_CPU_CACHE_VIPT
 
+#define ALIAS_FLUSH_START       0xffff4000
+
+#define TOP_PTE(x)      pte_offset_kernel(top_pmd, x)
+
+static void flush_pfn_alias(unsigned long pfn, unsigned long vaddr)
+{
+        unsigned long to = ALIAS_FLUSH_START + (CACHE_COLOUR(vaddr) << PAGE_SHIFT);
+
+        set_pte(TOP_PTE(to), pfn_pte(pfn, PAGE_KERNEL));
+        flush_tlb_kernel_page(to);
+
+        asm(    "mcrr   p15, 0, %1, %0, c14\n"
+        "       mcrr    p15, 0, %1, %0, c5\n"
+            :
+            : "r" (to), "r" (to + PAGE_SIZE - L1_CACHE_BYTES)
+            : "cc");
+}
+
 void flush_cache_mm(struct mm_struct *mm)
 {
         if (cache_is_vivt()) {
@@ -67,24 +85,6 @@ void flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr, unsig
         if (cache_is_vipt_aliasing())
                 flush_pfn_alias(pfn, user_addr);
 }
-
-#define ALIAS_FLUSH_START       0xffff4000
-
-#define TOP_PTE(x)      pte_offset_kernel(top_pmd, x)
-
-static void flush_pfn_alias(unsigned long pfn, unsigned long vaddr)
-{
-        unsigned long to = ALIAS_FLUSH_START + (CACHE_COLOUR(vaddr) << PAGE_SHIFT);
-
-        set_pte(TOP_PTE(to), pfn_pte(pfn, PAGE_KERNEL));
-        flush_tlb_kernel_page(to);
-
-        asm(    "mcrr   p15, 0, %1, %0, c14\n"
-        "       mcrr    p15, 0, %1, %0, c5\n"
-            :
-            : "r" (to), "r" (to + PAGE_SIZE - L1_CACHE_BYTES)
-            : "cc");
-}
 #else
 #define flush_pfn_alias(pfn,vaddr)      do { } while (0)
 #endif
diff --git a/arch/arm/mm/proc-arm1020.S b/arch/arm/mm/proc-arm1020.S
index 1d739d282a45..82ec954e45b6 100644
--- a/arch/arm/mm/proc-arm1020.S
+++ b/arch/arm/mm/proc-arm1020.S
@@ -509,7 +509,7 @@ cpu_arm1020_name:
 
         .align
 
-        .section ".proc.info", #alloc, #execinstr
+        .section ".proc.info.init", #alloc, #execinstr
 
         .type   __arm1020_proc_info,#object
 __arm1020_proc_info:
diff --git a/arch/arm/mm/proc-arm1020e.S b/arch/arm/mm/proc-arm1020e.S
index 9b725665b5c7..7375fe930f72 100644
--- a/arch/arm/mm/proc-arm1020e.S
+++ b/arch/arm/mm/proc-arm1020e.S
@@ -491,7 +491,7 @@ cpu_arm1020e_name:
 
         .align
 
-        .section ".proc.info", #alloc, #execinstr
+        .section ".proc.info.init", #alloc, #execinstr
 
         .type   __arm1020e_proc_info,#object
 __arm1020e_proc_info:
diff --git a/arch/arm/mm/proc-arm1022.S b/arch/arm/mm/proc-arm1022.S
index 37b70fa21c76..6ca639094d6f 100644
--- a/arch/arm/mm/proc-arm1022.S
+++ b/arch/arm/mm/proc-arm1022.S
@@ -473,7 +473,7 @@ cpu_arm1022_name:
 
         .align
 
-        .section ".proc.info", #alloc, #execinstr
+        .section ".proc.info.init", #alloc, #execinstr
 
         .type   __arm1022_proc_info,#object
 __arm1022_proc_info:
diff --git a/arch/arm/mm/proc-arm1026.S b/arch/arm/mm/proc-arm1026.S
index 931b690d1be2..10317e4f55d2 100644
--- a/arch/arm/mm/proc-arm1026.S
+++ b/arch/arm/mm/proc-arm1026.S
@@ -469,7 +469,7 @@ cpu_arm1026_name:
 
         .align
 
-        .section ".proc.info", #alloc, #execinstr
+        .section ".proc.info.init", #alloc, #execinstr
 
         .type   __arm1026_proc_info,#object
 __arm1026_proc_info:
diff --git a/arch/arm/mm/proc-arm6_7.S b/arch/arm/mm/proc-arm6_7.S
index d0f1bbb48f6c..8e7e1e70ab05 100644
--- a/arch/arm/mm/proc-arm6_7.S
+++ b/arch/arm/mm/proc-arm6_7.S
@@ -332,7 +332,7 @@ cpu_arm710_name:
 
                 .align
 
-                .section ".proc.info", #alloc, #execinstr
+                .section ".proc.info.init", #alloc, #execinstr
 
                 .type   __arm6_proc_info, #object
 __arm6_proc_info:
diff --git a/arch/arm/mm/proc-arm720.S b/arch/arm/mm/proc-arm720.S
index c69c9de32391..a13e0184d343 100644
--- a/arch/arm/mm/proc-arm720.S
+++ b/arch/arm/mm/proc-arm720.S
@@ -222,7 +222,7 @@ cpu_arm720_name:
  * See linux/include/asm-arm/procinfo.h for a definition of this structure.
  */
         
-                .section ".proc.info", #alloc, #execinstr
+                .section ".proc.info.init", #alloc, #execinstr
 
                 .type   __arm710_proc_info, #object
 __arm710_proc_info:
diff --git a/arch/arm/mm/proc-arm920.S b/arch/arm/mm/proc-arm920.S
index 0f490a0fcb71..d16513899999 100644
--- a/arch/arm/mm/proc-arm920.S
+++ b/arch/arm/mm/proc-arm920.S
@@ -452,7 +452,7 @@ cpu_arm920_name:
 
         .align
 
-        .section ".proc.info", #alloc, #execinstr
+        .section ".proc.info.init", #alloc, #execinstr
 
         .type   __arm920_proc_info,#object
 __arm920_proc_info:
diff --git a/arch/arm/mm/proc-arm922.S b/arch/arm/mm/proc-arm922.S
index 62bc34a139ee..23b8ed97f4e3 100644
--- a/arch/arm/mm/proc-arm922.S
+++ b/arch/arm/mm/proc-arm922.S
@@ -456,7 +456,7 @@ cpu_arm922_name:
 
         .align
 
-        .section ".proc.info", #alloc, #execinstr
+        .section ".proc.info.init", #alloc, #execinstr
 
         .type   __arm922_proc_info,#object
 __arm922_proc_info:
diff --git a/arch/arm/mm/proc-arm925.S b/arch/arm/mm/proc-arm925.S
index ee49aa2ca781..ee95c52db513 100644
--- a/arch/arm/mm/proc-arm925.S
+++ b/arch/arm/mm/proc-arm925.S
@@ -521,7 +521,7 @@ cpu_arm925_name:
 
         .align
 
-        .section ".proc.info", #alloc, #execinstr
+        .section ".proc.info.init", #alloc, #execinstr
 
         .type   __arm925_proc_info,#object
 __arm925_proc_info:
diff --git a/arch/arm/mm/proc-arm926.S b/arch/arm/mm/proc-arm926.S
index bb95cc9fed03..7d042dc20c47 100644
--- a/arch/arm/mm/proc-arm926.S
+++ b/arch/arm/mm/proc-arm926.S
@@ -471,7 +471,7 @@ cpu_arm926_name:
 
         .align
 
-        .section ".proc.info", #alloc, #execinstr
+        .section ".proc.info.init", #alloc, #execinstr
 
         .type   __arm926_proc_info,#object
 __arm926_proc_info:
diff --git a/arch/arm/mm/proc-sa110.S b/arch/arm/mm/proc-sa110.S
index 34f7e7d3f419..bd330c4075a1 100644
--- a/arch/arm/mm/proc-sa110.S
+++ b/arch/arm/mm/proc-sa110.S
@@ -249,7 +249,7 @@ cpu_sa110_name:
 
         .align
 
-        .section ".proc.info", #alloc, #execinstr
+        .section ".proc.info.init", #alloc, #execinstr
 
         .type   __sa110_proc_info,#object
 __sa110_proc_info:
diff --git a/arch/arm/mm/proc-sa1100.S b/arch/arm/mm/proc-sa1100.S
index ca14f80d5ab4..91b89124c0d7 100644
--- a/arch/arm/mm/proc-sa1100.S
+++ b/arch/arm/mm/proc-sa1100.S
@@ -280,7 +280,7 @@ cpu_sa1110_name:
 
         .align
 
-        .section ".proc.info", #alloc, #execinstr
+        .section ".proc.info.init", #alloc, #execinstr
 
         .type   __sa1100_proc_info,#object
 __sa1100_proc_info:
diff --git a/arch/arm/mm/proc-v6.S b/arch/arm/mm/proc-v6.S
index eb34823c9dbf..caf3b19b167f 100644
--- a/arch/arm/mm/proc-v6.S
+++ b/arch/arm/mm/proc-v6.S
@@ -240,7 +240,7 @@ cpu_elf_name:
         .size   cpu_elf_name, . - cpu_elf_name
         .align
 
-        .section ".proc.info", #alloc, #execinstr
+        .section ".proc.info.init", #alloc, #execinstr
 
         /*
          * Match any ARMv6 processor core.
diff --git a/arch/arm/mm/proc-xscale.S b/arch/arm/mm/proc-xscale.S
index b88de2700146..861b35947280 100644
--- a/arch/arm/mm/proc-xscale.S
+++ b/arch/arm/mm/proc-xscale.S
@@ -578,7 +578,7 @@ cpu_pxa270_name:
 
         .align
 
-        .section ".proc.info", #alloc, #execinstr
+        .section ".proc.info.init", #alloc, #execinstr
 
         .type   __80200_proc_info,#object
 __80200_proc_info: