251 static enum tp_func_state nr_func_state(const struct tracepoint_func *tp_funcs)  in nr_func_state()  argument
253 	if (!tp_funcs)  in nr_func_state()
255 	if (!tp_funcs[1].func)  in nr_func_state()
257 	if (!tp_funcs[2].func)  in nr_func_state()
262 static void tracepoint_update_call(struct tracepoint *tp, struct tracepoint_func *tp_funcs)  in tracepoint_update_call()  argument
269 	if (nr_func_state(tp_funcs) == TP_FUNC_1)  in tracepoint_update_call()
270 		func = tp_funcs[0].func;  in tracepoint_update_call()
281 	struct tracepoint_func *old, *tp_funcs;  in tracepoint_add_func()  local
290 	tp_funcs = rcu_dereference_protected(tp->funcs,  in tracepoint_add_func()
292 	old = func_add(&tp_funcs, func, prio);  in tracepoint_add_func()
304 	switch (nr_func_state(tp_funcs)) {  in tracepoint_add_func()
312 		tracepoint_update_call(tp, tp_funcs);  in tracepoint_add_func()
314 		rcu_assign_pointer(tp->funcs, tp_funcs);  in tracepoint_add_func()
319 		tracepoint_update_call(tp, tp_funcs);  in tracepoint_add_func()
327 		rcu_assign_pointer(tp->funcs, tp_funcs);  in tracepoint_add_func()
332 		if (tp_funcs[0].data != old[0].data)  in tracepoint_add_func()
353 	struct tracepoint_func *old, *tp_funcs;  in tracepoint_remove_func()  local
355 	tp_funcs = rcu_dereference_protected(tp->funcs,  in tracepoint_remove_func()
357 	old = func_remove(&tp_funcs, func);  in tracepoint_remove_func()
361 	if (tp_funcs == old)  in tracepoint_remove_func()
365 	switch (nr_func_state(tp_funcs)) {  in tracepoint_remove_func()
372 		tracepoint_update_call(tp, tp_funcs);  in tracepoint_remove_func()
382 		rcu_assign_pointer(tp->funcs, tp_funcs);  in tracepoint_remove_func()
390 		if (tp_funcs[0].data != old[0].data)  in tracepoint_remove_func()
394 		tracepoint_update_call(tp, tp_funcs);  in tracepoint_remove_func()
399 		rcu_assign_pointer(tp->funcs, tp_funcs);  in tracepoint_remove_func()
404 		if (tp_funcs[0].data != old[0].data)  in tracepoint_remove_func()