1 files changed, 2 insertions, 0 deletions

diff --git a/arch/mips/mm/c-octeon.c b/arch/mips/mm/c-octeon.c
index f41a5c5b0865..05b1d7cf9514 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);
 }