From: Jens Axboe <jens.axboe@oracle.com>
Date: Mon, 30 Oct 2006 18:07:48 +0000 (+0100)
Subject: [PATCH] CFQ: use irq safe locking in cfq_cic_link()
X-Git-Tag: v2.6.19-rc4~21
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0261d6886eb5822867a5310dc1e4479b940a1942;p=pandora-kernel.git

[PATCH] CFQ: use irq safe locking in cfq_cic_link()

If cfq_set_request() is called for a new process AND a non-fs io
request (so that __GFP_WAIT may not be set), cfq_cic_link() may
use spin_lock_irq() and spin_unlock_irq() with interrupts already
disabled.

Fix is to always use irq safe locking in cfq_cic_link()

Acked-By: Arjan van de Ven <arjan@linux.intel.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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