218 struct pmu {  struct
228 	 * various common per-pmu feature flags  argument
232 	int * __percpu			pmu_disable_count;  argument
233 	struct perf_cpu_context * __percpu pmu_cpu_context;  argument
242 	void (*pmu_enable)		(struct pmu *pmu); /* optional */  argument
243 	void (*pmu_disable)		(struct pmu *pmu); /* optional */  argument
261 	int (*event_init)		(struct perf_event *event);
267 	void (*event_mapped)		(struct perf_event *event); /*optional*/
268 	void (*event_unmapped)		(struct perf_event *event); /*optional*/
296 	int  (*add)			(struct perf_event *event, int flags);
297 	void (*del)			(struct perf_event *event, int flags);
338 	void (*start_txn)		(struct pmu *pmu, unsigned int txn_flags);  argument
347 	int  (*commit_txn)		(struct pmu *pmu);  argument
354 	void (*cancel_txn)		(struct pmu *pmu);  argument
379 	 * Set up pmu-private data structures for an AUX area  argument
386 	 * Free pmu-private AUX data structures  argument
388 	void (*free_aux)		(void *aux); /* optional */
393 	int (*filter_match)		(struct perf_event *event); /* optional */
469 	struct pmu			*pmu;  member
594 	struct pmu			*pmu;  member