diff options
Diffstat (limited to 'kernel/trace/trace_output.c')
| -rw-r--r-- | kernel/trace/trace_output.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c index fee40ffbd490..b9ab06c99543 100644 --- a/kernel/trace/trace_output.c +++ b/kernel/trace/trace_output.c @@ -1042,11 +1042,12 @@ enum print_line_t print_event_fields(struct trace_iterator *iter, struct trace_event_call *call; struct list_head *head; + lockdep_assert_held_read(&trace_event_sem); + /* ftrace defined events have separate call structures */ if (event->type <= __TRACE_LAST_TYPE) { bool found = false; - down_read(&trace_event_sem); list_for_each_entry(call, &ftrace_events, list) { if (call->event.type == event->type) { found = true; @@ -1056,7 +1057,6 @@ enum print_line_t print_event_fields(struct trace_iterator *iter, if (call->event.type > __TRACE_LAST_TYPE) break; } - up_read(&trace_event_sem); if (!found) { trace_seq_printf(&iter->seq, "UNKNOWN TYPE %d\n", event->type); goto out; |