diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index b6e9f7ad1d500541472375c17e5641c65c802ccd..5ea54e768b0a749cc4ef25f96edb1521228d4bdb 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -6496,7 +6496,9 @@ rb_simple_write(struct file *filp, const char __user *ubuf, if (buffer) { mutex_lock(&trace_types_lock); - if (val) { + if (!!val == tracer_tracing_is_on(tr)) { + val = 0; /* do nothing */ + } else if (val) { tracer_tracing_on(tr); if (tr->current_trace->start) tr->current_trace->start(tr);