tree a154a9b1913a459bdaed49c623d39f1e73689295
parent 44938af6e08580514abce8bea23ae1c034ea0b1d
author Oleg Nesterov <oleg@tv-sign.ru> 1159520455 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> 1159546698 -0700

[PATCH] futex_find_get_task(): don't take tasklist_lock

It is ok to do find_task_by_pid() + get_task_struct() under
rcu_read_lock(), we cand drop tasklist_lock.

Note that testing of ->exit_state is racy with or without tasklist anyway.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>