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-rw-r--r--arch/mips/mm/c-octeon.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/mips/mm/c-octeon.c b/arch/mips/mm/c-octeon.c
index f41a5c5b086..05b1d7cf951 100644
--- a/arch/mips/mm/c-octeon.c
+++ b/arch/mips/mm/c-octeon.c
@@ -137,8 +137,10 @@ static void octeon_flush_cache_sigtramp(unsigned long addr)
{
struct vm_area_struct *vma;
+ down_read(&current->mm->mmap_sem);
vma = find_vma(current->mm, addr);
octeon_flush_icache_all_cores(vma);
+ up_read(&current->mm->mmap_sem);
}