From: Eric Paris <eparis@redhat.com>
Date: Mon, 23 Mar 2009 17:22:09 +0000 (+0100)
Subject: mutex: add atomic_dec_and_mutex_lock()
X-Git-Tag: v2.6.31-rc1~407^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b1fca26631f76a5e8b18435a43f5d82b8734da4b;p=pandora-kernel.git

mutex: add atomic_dec_and_mutex_lock()

Much like the atomic_dec_and_lock() function in which we take an hold a
spin_lock if we drop the atomic to 0 this function takes and holds the
mutex if we dec the atomic to 0.

Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Orig-LKML-Reference: <20090323172417.410913479@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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