tree 1103bc655772ea388eb1fb2b259797bc9c703926
parent d5bee775137c56ed993f1b3c9d66c268b3525d7d
author Ingo Molnar <mingo@elte.hu> 1138198987 +0100
committer Linus Torvalds <torvalds@g5.osdl.org> 1138735818 -0800

[PATCH] fix uidhash_lock <-> RCU deadlock

RCU task-struct freeing can call free_uid(), which is taking
uidhash_lock - while other users of uidhash_lock are softirq-unsafe.

The fix is to always take the uidhash_spinlock in a softirq-safe manner.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Paul E. McKenney <paulmck@us.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>