1199 	struct bpf_prog_array *old_array;  in perf_event_attach_bpf_prog()  local
1217 	old_array = bpf_event_rcu_dereference(event->tp_event->prog_array);  in perf_event_attach_bpf_prog()
1218 	if (old_array &&  in perf_event_attach_bpf_prog()
1219 	    bpf_prog_array_length(old_array) >= BPF_TRACE_MAX_PROGS) {  in perf_event_attach_bpf_prog()
1224 	ret = bpf_prog_array_copy(old_array, NULL, prog, &new_array);  in perf_event_attach_bpf_prog()
1231 	bpf_prog_array_free(old_array);  in perf_event_attach_bpf_prog()
1240 	struct bpf_prog_array *old_array;  in perf_event_detach_bpf_prog()  local
1249 	old_array = bpf_event_rcu_dereference(event->tp_event->prog_array);  in perf_event_detach_bpf_prog()
1250 	ret = bpf_prog_array_copy(old_array, event->prog, NULL, &new_array);  in perf_event_detach_bpf_prog()
1254 		bpf_prog_array_delete_safe(old_array, event->prog);  in perf_event_detach_bpf_prog()
1257 		bpf_prog_array_free(old_array);  in perf_event_detach_bpf_prog()