From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Date: Mon, 21 Jul 2014 18:34:33 +0000 (-0700)
Subject: rcu: Don't track sysidle state if no nohz_full= CPUs
X-Git-Tag: omap-for-v3.19/prcm-cleanup~100^2~1^2~16^3~3
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=663e131090dd10bac9dc0b4f5b624dd3211b20f6;p=pandora-kernel.git

rcu: Don't track sysidle state if no nohz_full= CPUs

If there are no nohz_full= CPUs, then there is currently no reason to
track sysidle state.  This commit therefore short-circuits this state
tracking if !tick_nohz_full_enabled().

Note that these checks will need to be revisited if nohz_full= state
can ever be changed at runtime.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Tested-by: Paul Gortmaker <paul.gortmaker@windriver.com>
---

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