tree 0ffd18852842140a94c7d4b745f4beee7a75d628
parent 1f3b0faa3e9dc713efce392af1f58542e735f822
author Steven Rostedt (VMware) <rostedt@goodmis.org> 1522956026 -0400
committer Steven Rostedt (VMware) <rostedt@goodmis.org> 1523019414 -0400

tracing: Add rcu dereference annotation for test func that touches filter->prog

A boot up test function update_pred_fn() dereferences filter->prog without
the proper rcu annotation.

To do this, we must also take the event_mutex first. Normally, this isn't
needed because this test function can not race with other use cases that
touch the event filters (it is disabled if any events are enabled).

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Fixes: 80765597bc587 ("tracing: Rewrite filter logic to be simpler and faster")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>