From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Date: Sun, 1 Feb 2015 05:12:02 +0000 (-0800)
Subject: rcu: Remove event tracing from rcu_cpu_notify(), used by offline CPUs
X-Git-Tag: omap-for-v4.2/o2_dc~148^2~2^2^5~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=999c286347538388170f919146d7cfa58689472e;p=pandora-kernel.git

rcu: Remove event tracing from rcu_cpu_notify(), used by offline CPUs

Offline CPUs cannot safely invoke trace events, but such CPUs do execute
within rcu_cpu_notify().  Therefore, this commit removes the trace events
from rcu_cpu_notify().  These trace events are for utilization, against
which rcu_cpu_notify() execution time should be negligible.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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