318 static enum tp_func_state nr_func_state(const struct tracepoint_func *tp_funcs)  in nr_func_state()  argument
320 	if (!tp_funcs)  in nr_func_state()
322 	if (!tp_funcs[1].func)  in nr_func_state()
324 	if (!tp_funcs[2].func)  in nr_func_state()
329 static void tracepoint_update_call(struct tracepoint *tp, struct tracepoint_func *tp_funcs)  in tracepoint_update_call()  argument
336 	if (nr_func_state(tp_funcs) == TP_FUNC_1)  in tracepoint_update_call()
337 		func = tp_funcs[0].func;  in tracepoint_update_call()
348 	struct tracepoint_func *old, *tp_funcs;  in tracepoint_add_func()  local
357 	tp_funcs = rcu_dereference_protected(tp->funcs,  in tracepoint_add_func()
359 	old = func_add(&tp_funcs, func, prio);  in tracepoint_add_func()
371 	switch (nr_func_state(tp_funcs)) {  in tracepoint_add_func()
379 		tracepoint_update_call(tp, tp_funcs);  in tracepoint_add_func()
381 		rcu_assign_pointer(tp->funcs, tp_funcs);  in tracepoint_add_func()
386 		tracepoint_update_call(tp, tp_funcs);  in tracepoint_add_func()
394 		rcu_assign_pointer(tp->funcs, tp_funcs);  in tracepoint_add_func()
399 		if (tp_funcs[0].data != old[0].data)  in tracepoint_add_func()
420 	struct tracepoint_func *old, *tp_funcs;  in tracepoint_remove_func()  local
422 	tp_funcs = rcu_dereference_protected(tp->funcs,  in tracepoint_remove_func()
424 	old = func_remove(&tp_funcs, func);  in tracepoint_remove_func()
428 	if (tp_funcs == old)  in tracepoint_remove_func()
432 	switch (nr_func_state(tp_funcs)) {  in tracepoint_remove_func()
440 		tracepoint_update_call(tp, tp_funcs);  in tracepoint_remove_func()
450 		rcu_assign_pointer(tp->funcs, tp_funcs);  in tracepoint_remove_func()
458 		if (tp_funcs[0].data != old[0].data)  in tracepoint_remove_func()
462 		tracepoint_update_call(tp, tp_funcs);  in tracepoint_remove_func()
467 		rcu_assign_pointer(tp->funcs, tp_funcs);  in tracepoint_remove_func()
472 		if (tp_funcs[0].data != old[0].data)  in tracepoint_remove_func()