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tracing: Fix traceoff_on_warning handling on boot command line 

According to the documentation, adding "traceoff_on_warning" to the boot
command line should be enough to enable the feature. But right now it is
necessary to specify "traceoff_on_warning=". Along with fixing that, also
verify if the value passed, if any, is either "0" or "off".

Link: http://lkml.kernel.org/r/20141112231400.GL12281@uudg.org

Signed-off-by: Luis Claudio R. Goncalves <lgoncalv@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Luis Claudio R. Goncalves 2014-11-12 21:14:00 -02:00 committed by Steven Rostedt
parent fe578ba36f
commit 933ff9f202
1 changed files with 3 additions and 2 deletions
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5
kernel/trace/trace.c
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@ -155,10 +155,11 @@ __setup("ftrace_dump_on_oops", set_ftrace_dump_on_oops);
static int __init stop_trace_on_warning(char *str)
{
__disable_trace_on_warning = 1;
if ((strcmp(str, "=0") != 0 && strcmp(str, "=off") != 0))
__disable_trace_on_warning = 1;
return 1;
}
__setup("traceoff_on_warning=", stop_trace_on_warning);
__setup("traceoff_on_warning", stop_trace_on_warning);
static int __init boot_alloc_snapshot(char *str)
{