oom_kill: change oom_kill.c to use for_each_thread()

Change oom_kill.c to use for_each_thread() rather than the racy
while_each_thread() which can loop forever if we race with exit.

Note also that most users were buggy even if while_each_thread() was
fine, the task can exit even _before_ rcu_read_lock().

Fortunately the new for_each_thread() only requires the stable
task_struct, so this change fixes both problems.

Signed-off-by: Oleg Nesterov <[email protected]>
Reviewed-by: Sergey Dyasly <[email protected]>
Tested-by: Sergey Dyasly <[email protected]>
Reviewed-by: Sameer Nanda <[email protected]>
Cc: "Eric W. Biederman" <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Mandeep Singh Baines <[email protected]>
Cc: "Ma, Xindong" <[email protected]>
Reviewed-by: Michal Hocko <[email protected]>
Cc: "Tu, Xiaobing" <[email protected]>
Acked-by: David Rientjes <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions