1 files changed, 2 insertions, 0 deletions

diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 55b2f3dc6bb3..63d402f75e25 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -496,7 +496,9 @@ do_cache_op(unsigned long start, unsigned long end, int flags)
                 if (end > vma->vm_end)
                         end = vma->vm_end;
 
+                up_read(&mm->mmap_sem);
                 flush_cache_user_range(start, end);
+                return;
         }
         up_read(&mm->mmap_sem);
 }