tree bfb72d1ba5f362aca38cf09857e3d9fcc05dd60a
parent 73863ab028579ed98c4f1f36d016536b1b415344
author Anton Vorontsov <anton.vorontsov@linaro.org> 1338506783 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1338511770 -0700

sh: use clear_tasks_mm_cpumask()

Checking for process->mm is not enough because process' main thread may
exit or detach its mm via use_mm(), but other threads may still have a
valid mm.

To fix this we would need to use find_lock_task_mm(), which would walk up
all threads and returns an appropriate task (with task lock held).

clear_tasks_mm_cpumask() has the issue fixed, so let's use it.

Suggested-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>