MIPS: Drop mmap_sem in pagefault oom path

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

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c
index 6751ce9..f956ecb 100644 (file)
--- 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;