From: Jiri Kosina <jkosina@suse.cz>
Date: Wed, 28 Mar 2007 16:12:34 +0000 (+0200)
Subject: [PATCH] oprofile: fix potential deadlock on oprofilefs_lock
X-Git-Tag: v2.6.21-rc6~77
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4dfc896e90359df04c80da5ab08ec31e87846c43;p=pandora-kernel.git

[PATCH] oprofile: fix potential deadlock on oprofilefs_lock

nmi_cpu_setup() is called from hardirq context and acquires oprofilefs_lock.
alloc_event_buffer() and oprofilefs_ulong_from_user() acquire this lock
without disabling irqs, which could deadlock.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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