2205 	struct bpf_prog_array *old_array;  in perf_event_attach_bpf_prog()  local
2223 	old_array = bpf_event_rcu_dereference(event->tp_event->prog_array);  in perf_event_attach_bpf_prog()
2224 	if (old_array &&  in perf_event_attach_bpf_prog()
2225 	    bpf_prog_array_length(old_array) >= BPF_TRACE_MAX_PROGS) {  in perf_event_attach_bpf_prog()
2230 	ret = bpf_prog_array_copy(old_array, NULL, prog, bpf_cookie, &new_array);  in perf_event_attach_bpf_prog()
2238 	bpf_prog_array_free_sleepable(old_array);  in perf_event_attach_bpf_prog()
2247 	struct bpf_prog_array *old_array;  in perf_event_detach_bpf_prog()  local
2257 	old_array = bpf_event_rcu_dereference(event->tp_event->prog_array);  in perf_event_detach_bpf_prog()
2258 	if (!old_array)  in perf_event_detach_bpf_prog()
2261 	ret = bpf_prog_array_copy(old_array, event->prog, NULL, 0, &new_array);  in perf_event_detach_bpf_prog()
2263 		bpf_prog_array_delete_safe(old_array, event->prog);  in perf_event_detach_bpf_prog()
2266 		bpf_prog_array_free_sleepable(old_array);  in perf_event_detach_bpf_prog()