The original code doesn't work because "call" is never NULL there.
Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>
---
The original patch was fine, but this version is more tasteful. ;)
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index 4615f62..c1a263a 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -1397,7 +1397,7 @@ int ftrace_profile_set_filter(struct perf_event *event, int event_id,
}
err = -EINVAL;
- if (!call)
+ if (&call->list == &ftrace_events)
goto out_unlock;
err = -EEXIST;
--
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