From: Frederic Weisbecker <fweisbec@gmail.com>
Date: Thu, 16 Jul 2009 13:44:29 +0000 (+0200)
Subject: sched: Add a preempt count base offset to __might_sleep()
X-Git-Tag: v2.6.32-rc1~719^2~46
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e4aafea2d4bde8b44d6500c4ee7195bbfc51269e;p=pandora-kernel.git

sched: Add a preempt count base offset to __might_sleep()

Add a preempt count base offset to compare against the current
preempt level count. It prepares to pull up the might_sleep
check from cond_resched() to cond_resched_lock() and
cond_resched_bh().

For these two helpers, we need to respectively ensure that once
we'll unlock the given spinlock / reenable local softirqs, we
will reach a sleepable state.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
[ Move and rename preempt_count_equals() ]
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1247725694-6082-4-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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