From: "Luis Claudio R. Goncalves" <[email protected]>

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/[email protected]

Signed-off-by: Luis Claudio R. Goncalves <[email protected]>
Signed-off-by: Steven Rostedt <[email protected]>
---
 kernel/trace/trace.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

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)
 {
-- 
2.1.1


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