From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Date: Mon, 4 Jan 2010 23:09:01 +0000 (-0800)
Subject: rcu: Adjust force_quiescent_state() locking, step 2
X-Git-Tag: v2.6.34-rc1~265^2~43
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=559569acf94f538b56bd6eead80b439d6a78cdff;p=pandora-kernel.git

rcu: Adjust force_quiescent_state() locking, step 2

This patch releases rnp->lock after the end of
force_quiescent_state()'s switch statement.  This is a second
step towards prohibiting starting grace periods while
force_quiescent_state() is executing, which will reduce the
number and complexity of races that force_quiescent_state() is
involved in.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: laijs@cn.fujitsu.com
Cc: dipankar@in.ibm.com
Cc: mathieu.desnoyers@polymtl.ca
Cc: josh@joshtriplett.org
Cc: dvhltc@us.ibm.com
Cc: niv@us.ibm.com
Cc: peterz@infradead.org
Cc: rostedt@goodmis.org
Cc: Valdis.Kletnieks@vt.edu
Cc: dhowells@redhat.com
LKML-Reference: <12626465501994-git-send-email->
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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