From: Ingo Molnar <mingo@elte.hu>
Date: Wed, 25 Jan 2006 14:23:07 +0000 (+0100)
Subject: [PATCH] fix uidhash_lock <-> RCU deadlock
X-Git-Tag: v2.6.16-rc2~248
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4021cb279a532728c3208a16b9b09b0ca8016850;p=pandora-kernel.git

[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>
---

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