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tracing: Have event with function tracer check error return

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The self tests for event tracer does not check if the function
tracing was successfully activated. It needs to before it continues
the tests, otherwise the wrong errors may be reported.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt 2011-05-23 15:27:46 -04:00 committed by Steven Rostedt
parent a1cd617359
commit 17bb615ad4
1 changed files with 6 additions and 1 deletions
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7
kernel/trace/trace_events.c
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@ -1657,7 +1657,12 @@ static struct ftrace_ops trace_ops __initdata =
static __init void event_trace_self_test_with_function(void)
{
register_ftrace_function(&trace_ops);
int ret;
ret = register_ftrace_function(&trace_ops);
if (WARN_ON(ret < 0)) {
pr_info("Failed to enable function tracer for event tests\n");
return;
}
pr_info("Running tests again, along with the function tracer\n");
event_trace_self_tests();
unregister_ftrace_function(&trace_ops);