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tracing: Check the return value of trace_get_user()
authorLi Zefan <lizf@cn.fujitsu.com>
Tue, 22 Sep 2009 05:52:20 +0000 (13:52 +0800)
committerIngo Molnar <mingo@elte.hu>
Tue, 22 Sep 2009 08:28:55 +0000 (10:28 +0200)
Return immediately if trace_get_user() returned failure.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <4AB86614.7020803@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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