[PATCH 09/10] um: Properly check all process' threads for a live mm

Am 24.03.2012 11:31, schrieb Anton Vorontsov:

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

To catch this we use find_lock_task_mm(), which walks up all
threads and returns an appropriate task (with task lock held).

Suggested-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Anton Vorontsov <redacted>

Acked-by: Richard Weinberger <richard@nod.at>

Thanks,
//richard

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