From: Peter Zijlstra <peterz@infradead.org>
Date: Thu, 8 Dec 2011 22:34:13 +0000 (-0800)
Subject: printk: avoid double lock acquire
X-Git-Tag: v3.2-rc5~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=09dc3cf93f7d16fdd37a0ad8486faebb5e2769ec;p=pandora-kernel.git

printk: avoid double lock acquire

Commit 4f2a8d3cf5e ("printk: Fix console_sem vs logbuf_lock unlock race")
introduced another silly bug where we would want to acquire an already
held lock.  Avoid this.

Reported-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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