From: Ingo Molnar <mingo@elte.hu>
Date: Mon, 9 Mar 2009 09:11:36 +0000 (+0100)
Subject: tracing: optimize trace_printk()
X-Git-Tag: v2.6.30-rc1~2^2~53^3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7bffc23e56e92c14b787bf4d95249a32085bfed5;p=pandora-kernel.git

tracing: optimize trace_printk()

Impact: micro-optimization

trace_printk() does this unconditionally:

	trace_printk_fmt = fmt;

Where trace_printk_fmt is an entry into a global array. This is
very SMP-unfriendly.

So only write it once per bootup.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <1236356510-8381-5-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

Reading git-diff-tree failed