tree 914fad20ce59c42bd3781820c8fb73286581a5ae
parent 1f64d69c7ad2e48e697493e45590679f7a69b7b2
author Zeng Zhaoming <zengzm.kernel@gmail.com> 1291329073 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1291330274 -0800

mm/mempolicy.c: add rcu read lock to protect pid structure

find_task_by_vpid() should be protected by rcu_read_lock(), to prevent
free_pid() reclaiming pid.

Signed-off-by: Zeng Zhaoming <zengzm.kernel@gmail.com>
Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>