tracepoints: dont update zero-sized tracepoint sections
Zero-sized tracepoint sections can occur if tracing is enabled but
no tracepoint is defined. Do not emit a warning in that case.
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
LKML-Reference: <1237394936.3132.1.camel@localhost.localdomain>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c
index adf2873..1ef5d3a 100644
--- a/kernel/tracepoint.c
+++ b/kernel/tracepoint.c
@@ -278,10 +278,8 @@
struct tracepoint *iter;
struct tracepoint_entry *mark_entry;
- if (!begin) {
- WARN_ON_ONCE(1);
+ if (!begin)
return;
- }
mutex_lock(&tracepoints_mutex);
for (iter = begin; iter < end; iter++) {
