X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;f=kernel%2Ftracepoint.c;h=1ef5d3a601c768822b44504d3a5abbf861b20178;hb=2678251b207394aa8b9d92c653c05a8b3449f1f5;hp=79602740bbb5f396278dbe1665eada4c6f0259f0;hpb=c58bd34d00e04df9a0691732086cf8102b20d907;p=~andy%2Flinux

diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c
index 79602740bbb..1ef5d3a601c 100644
--- a/kernel/tracepoint.c
+++ b/kernel/tracepoint.c
@@ -272,12 +272,15 @@ static void disable_tracepoint(struct tracepoint *elem)
  *
  * Updates the probe callback corresponding to a range of tracepoints.
  */
-void tracepoint_update_probe_range(struct tracepoint *begin,
-	struct tracepoint *end)
+void
+tracepoint_update_probe_range(struct tracepoint *begin, struct tracepoint *end)
 {
 	struct tracepoint *iter;
 	struct tracepoint_entry *mark_entry;
 
+	if (!begin)
+		return;
+
 	mutex_lock(&tracepoints_mutex);
 	for (iter = begin; iter < end; iter++) {
 		mark_entry = get_tracepoint(iter->name);