2110 	struct bpf_prog_array *old_array;  in perf_event_attach_bpf_prog()  local
2128 	old_array = bpf_event_rcu_dereference(event->tp_event->prog_array);  in perf_event_attach_bpf_prog()
2129 	if (old_array &&  in perf_event_attach_bpf_prog()
2130 	    bpf_prog_array_length(old_array) >= BPF_TRACE_MAX_PROGS) {  in perf_event_attach_bpf_prog()
2135 	ret = bpf_prog_array_copy(old_array, NULL, prog, bpf_cookie, &new_array);  in perf_event_attach_bpf_prog()
2143 	bpf_prog_array_free_sleepable(old_array);  in perf_event_attach_bpf_prog()
2152 	struct bpf_prog_array *old_array;  in perf_event_detach_bpf_prog()  local
2161 	old_array = bpf_event_rcu_dereference(event->tp_event->prog_array);  in perf_event_detach_bpf_prog()
2162 	ret = bpf_prog_array_copy(old_array, event->prog, NULL, 0, &new_array);  in perf_event_detach_bpf_prog()
2166 		bpf_prog_array_delete_safe(old_array, event->prog);  in perf_event_detach_bpf_prog()
2169 		bpf_prog_array_free_sleepable(old_array);  in perf_event_detach_bpf_prog()