297 static enum tp_func_state nr_func_state(const struct tracepoint_func *tp_funcs)  in nr_func_state()  argument
299 	if (!tp_funcs)  in nr_func_state()
301 	if (!tp_funcs[1].func)  in nr_func_state()
303 	if (!tp_funcs[2].func)  in nr_func_state()
308 static void tracepoint_update_call(struct tracepoint *tp, struct tracepoint_func *tp_funcs)  in tracepoint_update_call()  argument
315 	if (nr_func_state(tp_funcs) == TP_FUNC_1)  in tracepoint_update_call()
316 		func = tp_funcs[0].func;  in tracepoint_update_call()
327 	struct tracepoint_func *old, *tp_funcs;  in tracepoint_add_func()  local
336 	tp_funcs = rcu_dereference_protected(tp->funcs,  in tracepoint_add_func()
338 	old = func_add(&tp_funcs, func, prio);  in tracepoint_add_func()
350 	switch (nr_func_state(tp_funcs)) {  in tracepoint_add_func()
358 		tracepoint_update_call(tp, tp_funcs);  in tracepoint_add_func()
360 		rcu_assign_pointer(tp->funcs, tp_funcs);  in tracepoint_add_func()
365 		tracepoint_update_call(tp, tp_funcs);  in tracepoint_add_func()
373 		rcu_assign_pointer(tp->funcs, tp_funcs);  in tracepoint_add_func()
378 		if (tp_funcs[0].data != old[0].data)  in tracepoint_add_func()
399 	struct tracepoint_func *old, *tp_funcs;  in tracepoint_remove_func()  local
401 	tp_funcs = rcu_dereference_protected(tp->funcs,  in tracepoint_remove_func()
403 	old = func_remove(&tp_funcs, func);  in tracepoint_remove_func()
407 	if (tp_funcs == old)  in tracepoint_remove_func()
411 	switch (nr_func_state(tp_funcs)) {  in tracepoint_remove_func()
419 		tracepoint_update_call(tp, tp_funcs);  in tracepoint_remove_func()
429 		rcu_assign_pointer(tp->funcs, tp_funcs);  in tracepoint_remove_func()
437 		if (tp_funcs[0].data != old[0].data)  in tracepoint_remove_func()
441 		tracepoint_update_call(tp, tp_funcs);  in tracepoint_remove_func()
446 		rcu_assign_pointer(tp->funcs, tp_funcs);  in tracepoint_remove_func()
451 		if (tp_funcs[0].data != old[0].data)  in tracepoint_remove_func()