From: Steven Rostedt Date: Tue, 28 May 2013 18:38:42 +0000 (-0400) Subject: rcu: Add _notrace variation of rcu_dereference_raw() and hlist_for_each_entry_rcu() X-Git-Tag: v3.10-rc5~9^2~3 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=12bcbe66d7b3cc9f9f86cd02f925666eaa3c2107;p=pandora-kernel.git rcu: Add _notrace variation of rcu_dereference_raw() and hlist_for_each_entry_rcu() As rcu_dereference_raw() under RCU debug config options can add quite a bit of checks, and that tracing uses rcu_dereference_raw(), these checks happen with the function tracer. The function tracer also happens to trace these debug checks too. This added overhead can livelock the system. Add a new interface to RCU for both rcu_dereference_raw_notrace() as well as hlist_for_each_entry_rcu_notrace() as the hlist iterator uses the rcu_dereference_raw() as well, and is used a bit with the function tracer. Link: http://lkml.kernel.org/r/20130528184209.304356745@goodmis.org Acked-by: Paul E. McKenney Signed-off-by: Steven Rostedt --- Reading git-diff-tree failed