2198 	struct bpf_prog_array *old_array;  in perf_event_attach_bpf_prog()  local
2216 	old_array = bpf_event_rcu_dereference(event->tp_event->prog_array);  in perf_event_attach_bpf_prog()
2217 	if (old_array &&  in perf_event_attach_bpf_prog()
2218 	    bpf_prog_array_length(old_array) >= BPF_TRACE_MAX_PROGS) {  in perf_event_attach_bpf_prog()
2223 	ret = bpf_prog_array_copy(old_array, NULL, prog, bpf_cookie, &new_array);  in perf_event_attach_bpf_prog()
2231 	bpf_prog_array_free_sleepable(old_array);  in perf_event_attach_bpf_prog()
2240 	struct bpf_prog_array *old_array;  in perf_event_detach_bpf_prog()  local
2250 	old_array = bpf_event_rcu_dereference(event->tp_event->prog_array);  in perf_event_detach_bpf_prog()
2251 	if (!old_array)  in perf_event_detach_bpf_prog()
2254 	ret = bpf_prog_array_copy(old_array, event->prog, NULL, 0, &new_array);  in perf_event_detach_bpf_prog()
2256 		bpf_prog_array_delete_safe(old_array, event->prog);  in perf_event_detach_bpf_prog()
2259 		bpf_prog_array_free_sleepable(old_array);  in perf_event_detach_bpf_prog()