From: Ming Lei <tom.leiming@gmail.com>
Date: Thu, 16 Jul 2009 13:44:29 +0000 (+0200)
Subject: lockdep: Improve implementation of BFS
X-Git-Tag: v2.6.32-rc1~726^2~31
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d588e46155e9c51217b9840db1e94a0f594c1af2;p=pandora-kernel.git

lockdep: Improve implementation of BFS

1,replace %MAX_CIRCULAR_QUE_SIZE with &(MAX_CIRCULAR_QUE_SIZE-1)
since we define MAX_CIRCULAR_QUE_SIZE as power of 2;

2,use bitmap to mark if a lock is accessed in BFS in order to
clear it quickly, because we may search a graph many times.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1246201486-7308-3-git-send-email-tom.leiming@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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