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Commit f2461fc8 authored by Mathieu Desnoyers's avatar Mathieu Desnoyers Committed by Ingo Molnar
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tracepoints: tracepoint_synchronize_unregister() 



Create tracepoint_synchronize_unregister() which must be called before the end
of exit() to make sure every probe callers have exited the non preemptible
section and thus are not executing the probe code anymore.

Signed-off-by: default avatarMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 8b27386a

include/linux/tracepoint.h

+7 −0
Original line number Diff line number Diff line
@@ -124,4 +124,11 @@ extern void tracepoint_iter_reset(struct tracepoint_iter *iter); 
extern int tracepoint_get_iter_range(struct tracepoint **tracepoint,

	struct tracepoint *begin, struct tracepoint *end);



/*

 * tracepoint_synchronize_unregister must be called between the last tracepoint

 * probe unregistration and the end of module exit to make sure there is no

 * caller executing a probe when it is freed.

 */

#define tracepoint_synchronize_unregister() synchronize_sched()



#endif