[PATCH 11/15] parse-events: Let pevent_free() take a NULL pointer

[Frederic Weisbecker]

From: Steven Rostedt <srostedt@xxxxxxxxxx>

The pevent_free() should ack like other free()s and allow a
NULL pointer to be passed to it which makes error handling a bit
easier for the users of pevent_free().

Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Arun Sharma <asharma@xxxxxx>
Cc: Namhyung Kim <namhyung.kim@xxxxxxx>
Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
---
 tools/lib/traceevent/event-parse.c |   13 ++++++++++---
 1 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index cdb32c7..4d5092f 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -4960,13 +4960,20 @@ static void free_event(struct event_format *event)
  */
 void pevent_free(struct pevent *pevent)
 {
-	struct cmdline_list *cmdlist = pevent->cmdlist, *cmdnext;
-	struct func_list *funclist = pevent->funclist, *funcnext;
-	struct printk_list *printklist = pevent->printklist, *printknext;
+	struct cmdline_list *cmdlist, *cmdnext;
+	struct func_list *funclist, *funcnext;
+	struct printk_list *printklist, *printknext;
 	struct pevent_function_handler *func_handler;
 	struct event_handler *handle;
 	int i;
 
+	if (!pevent)
+		return;
+
+	cmdlist = pevent->cmdlist;
+	funclist = pevent->funclist;
+	printklist = pevent->printklist;
+
 	pevent->ref_count--;
 	if (pevent->ref_count)
 		return;
-- 
1.7.5.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/