From: Luis Claudio R. Goncalves Date: Wed, 12 Nov 2014 23:14:00 +0000 (-0200) Subject: tracing: Fix traceoff_on_warning handling on boot command line X-Git-Tag: firefly_0821_release~176^2~2663^2~49 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=933ff9f20220e1339964c7a76a34ca9aaa4a8c37;p=firefly-linux-kernel-4.4.55.git 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 Signed-off-by: Steven Rostedt --- diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 8a528392b1f4..75798ab8eb88 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -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) {