Commit 1f3b0faa authored Apr 05, 2018 by Steven Rostedt (VMware)

tracing: Add rcu dereference annotation for filter->prog



ftrace_function_set_filter() referenences filter->prog without annotation
and sparse complains about it. It needs a rcu_dereference_protected()
wrapper.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Fixes: 80765597 ("tracing: Rewrite filter logic to be simpler and faster")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

parent 5125eee4

kernel/trace/trace_events_filter.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -1992,7 +1992,8 @@ static bool is_or(struct prog_entry *prog, int i)
		static int ftrace_function_set_filter(struct perf_event *event,
		struct event_filter *filter)
		{
		struct prog_entry *prog = filter->prog;
		struct prog_entry *prog = rcu_dereference_protected(filter->prog,
		lockdep_is_held(&event_mutex));
		struct function_filter_data data = {
		.first_filter = 1,
		.first_notrace = 1,