From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Date: Mon, 4 Jan 2010 23:09:04 +0000 (-0800)
Subject: rcu: Eliminate local variable lastcomp from force_quiescent_state()
X-Git-Tag: v2.6.34-rc1~265^2~40
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=39c0bbfc07c6e28db7346d0e11106f2d045d3035;p=pandora-kernel.git

rcu: Eliminate local variable lastcomp from force_quiescent_state()

Because rsp->fqs_active is set to 1 across
force_quiescent_state()'s switch statement, rcu_start_gp() will
refrain from starting a new grace period during this time.
Therefore, rsp->gpnum is constant, and can be propagated to all
uses of lastcomp, eliminating this local variable.

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: <12626465502985-git-send-email->
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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