[PATCH] mips: drop mmap_sem in pagefault oom path

[Akinobu Mita <akinobu.mita@gmail.com>]

Fix the pagefault oom path which does not drop mm->mmap_sem.
This was introduced by commit c7c1e3846bac1e4b8a8941f6a194812e28b0a519
(This is not compile tested)

Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
---
 arch/mips/mm/fault.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c
index 6751ce9..f956ecb 100644
--- a/arch/mips/mm/fault.c
+++ b/arch/mips/mm/fault.c
@@ -171,6 +171,7 @@ out_of_memory:
 	 * We ran out of memory, call the OOM killer, and return the userspace
 	 * (which will retry the fault, or kill us if we got oom-killed).
 	 */
+	up_read(&mm->mmap_sem);
 	pagefault_out_of_memory();
 	return;
 
-- 
1.6.0.6