From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Date: Sat, 6 Aug 2011 05:39:02 +0000 (-0700)
Subject: rcu: Eliminate in_irq() checks in rcu_enter_nohz()
X-Git-Tag: v3.2-rc1~165^2^2~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=717f98f0f87c16c1e5768ac8f67c27f3d3535a25;p=pandora-kernel.git

rcu: Eliminate in_irq() checks in rcu_enter_nohz()

The in_irq() check in rcu_enter_nohz() is redundant because if we really
are in an interrupt, the attempt to re-enter dyntick-idle mode will invoke
rcu_needs_cpu() in any case, which will force the check for RCU callbacks.
So this commit removes the check along with the set_need_resched().

Suggested-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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