Merge master.kernel.org:/home/rmk/linux-2.6-arm

* master.kernel.org:/home/rmk/linux-2.6-arm: (25 commits)
  ARM: 5728/1: Proper prefetch abort handling on ARMv6 and ARMv7
  ARM: 5727/1: Pass IFSR register to do_PrefetchAbort()
  ARM: 5740/1: fix valid_phys_addr_range() range check
  ARM: 5739/1: ARM: allow empty ATAG_CORE
  ARM: 5735/1: sa1111: CodingStyle cleanups
  ARM: 5738/1: Correct TCM documentation
  ARM: 5734/1: arm: fix compilation of entry-common.S for older CPUs
  ARM: 5733/1: fix bcmring compile error
  ARM: 5732/1: remove redundant include file
  ARM: 5731/2: Fix U300 generic GPIO, remove ifdefs from MMCI v3
  ARM: Ensure do_cache_op takes mmap_sem
  ARM: Fix __cpuexit section mismatch warnings
  ARM: Don't allow highmem on SMP platforms without h/w TLB ops broadcast
  ARM: includecheck fix: mach-davinci, board-dm365-evm.c
  ARM: Remove unused CONFIG SA1100_H3XXX
  ARM: Fix warning: unused variable 'highmem'
  ARM: Fix warning: #warning syscall migrate_pages not implemented
  ARM: Fix SA11x0 clocksource warning
  ARM: Fix SA1100 Neponset serial section mismatch
  ARM: Fix SA1100 Assabet/Neponset PCMCIA section mismatch warnings
  ...

1 files changed, 4 insertions, 1 deletions

diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 57eb0f6f6005..467b69ed1021 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -418,12 +418,14 @@ static int bad_syscall(int n, struct pt_regs *regs)
 static inline void
 do_cache_op(unsigned long start, unsigned long end, int flags)
 {
+        struct mm_struct *mm = current->active_mm;
         struct vm_area_struct *vma;
 
         if (end < start || flags)
                 return;
 
-        vma = find_vma(current->active_mm, start);
+        down_read(&mm->mmap_sem);
+        vma = find_vma(mm, start);
         if (vma && vma->vm_start < end) {
                 if (start < vma->vm_start)
                         start = vma->vm_start;
@@ -432,6 +434,7 @@ do_cache_op(unsigned long start, unsigned long end, int flags)
 
                 flush_cache_user_range(vma, start, end);
         }
+        up_read(&mm->mmap_sem);
 }
 
 /*