From: Darren Hart <dvhltc@us.ibm.com>
Date: Fri, 3 Apr 2009 20:40:12 +0000 (-0700)
Subject: rt_mutex: add proxy lock routines
X-Git-Tag: v2.6.31-rc1~409^2~14
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8dac456a681bd94272ff50ecb31be6b669382c2b;p=pandora-kernel.git

rt_mutex: add proxy lock routines

This patch is a prerequisite for futex requeue_pi. It basically splits
rt_mutex_slowlock() right down the middle, just before the first call
to schedule(). It further adds helper functions which make use of the
split and provide the rt-mutex preliminaries for futex requeue_pi.

Signed-off-by: Darren Hart <dvhltc@us.ibm.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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