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mm: prevent mmap_cache race in find_vma()
[pandora-kernel.git]
/
mm
/
mmap.c
diff --git
a/mm/mmap.c
b/mm/mmap.c
index
eae90af
..
dff37a6
100644
(file)
--- a/
mm/mmap.c
+++ b/
mm/mmap.c
@@
-1573,7
+1573,7
@@
struct vm_area_struct *find_vma(struct mm_struct *mm, unsigned long addr)
if (mm) {
/* Check the cache first. */
/* (Cache hit rate is typically around 35%.) */
- vma =
mm->mmap_cache
;
+ vma =
ACCESS_ONCE(mm->mmap_cache)
;
if (!(vma && vma->vm_end > addr && vma->vm_start <= addr)) {
struct rb_node * rb_node;