mm: prevent mmap_cache race in find_vma()

[pandora-kernel.git] / mm / nommu.c

diff --git a/mm/nommu.c b/mm/nommu.c
index f59e170..f0cd7ab 100644 (file)
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -807,7 +807,7 @@ struct vm_area_struct *find_vma(struct mm_struct *mm, unsigned long addr)
        struct vm_area_struct *vma;
 
        /* check the cache first */
-       vma = mm->mmap_cache;
+       vma = ACCESS_ONCE(mm->mmap_cache);
        if (vma && vma->vm_start <= addr && vma->vm_end > addr)
                return vma;