From: Li Zefan <lizf@cn.fujitsu.com>
Date: Tue, 8 Dec 2009 03:15:45 +0000 (+0800)
Subject: function-graph: Allow writing the same val to set_graph_function
X-Git-Tag: v2.6.33-rc1~52^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=91baf6285be7282cfa487de92f836c50749dffb9;p=pandora-kernel.git

function-graph: Allow writing the same val to set_graph_function

# echo 'do_open' > set_graph_function
 # echo 'do_open' >> set_graph_function
 bash: echo: write error: Invalid argument

Make it valid to write the same value to set_graph_function,
which is consistent with set_ftrace_filter interface.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
LKML-reference: <4B1DC4E1.1060303@cn.fujitsu.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
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