diff options
| -rw-r--r-- | kernel/trace/trace_osnoise.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c index ceff407655a5..7d6be609d3dd 100644 --- a/kernel/trace/trace_osnoise.c +++ b/kernel/trace/trace_osnoise.c @@ -1930,8 +1930,10 @@ static int __osnoise_tracer_start(struct trace_array *tr) retval = osnoise_hook_events(); if (retval) return retval; + /* - * Make sure NMIs see reseted values. + * Make sure that ftrace_nmi_enter/exit() see reset values + * before enabling trace_osnoise_callback_enabled. */ barrier(); trace_osnoise_callback_enabled = true; @@ -1966,6 +1968,10 @@ static void osnoise_tracer_stop(struct trace_array *tr) return; trace_osnoise_callback_enabled = false; + /* + * Make sure that ftrace_nmi_enter/exit() see + * trace_osnoise_callback_enabled as false before continuing. + */ barrier(); stop_per_cpu_kthreads(); |