tree 7eba1558fe80c2d1de46f5d2f7cad404dc7da5ee
parent 91f4f94ea3f2eabb4cee68149a31e30f84a993dd
author Michal Hocko <mhocko@suse.com> 1464045954 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1464048254 -0700

vdso: make arch_setup_additional_pages wait for mmap_sem for write killable

most architectures are relying on mmap_sem for write in their
arch_setup_additional_pages.  If the waiting task gets killed by the oom
killer it would block oom_reaper from asynchronous address space reclaim
and reduce the chances of timely OOM resolving.  Wait for the lock in
the killable mode and return with EINTR if the task got killed while
waiting.

Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Andy Lutomirski <luto@amacapital.net>	[x86 vdso]
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>