2433 			   struct bpf_prog *dst_prog)  in bpf_prog_load_check_attach()  argument
2439 		if (!attach_btf && !dst_prog)  in bpf_prog_load_check_attach()
2453 	if (attach_btf && (!btf_id || dst_prog))  in bpf_prog_load_check_attach()
2456 	if (dst_prog && prog_type != BPF_PROG_TYPE_TRACING &&  in bpf_prog_load_check_attach()
2586 	struct bpf_prog *prog, *dst_prog = NULL;  in bpf_prog_load()  local
2635 		dst_prog = bpf_prog_get(attr->attach_prog_fd);  in bpf_prog_load()
2636 		if (IS_ERR(dst_prog)) {  in bpf_prog_load()
2637 			dst_prog = NULL;  in bpf_prog_load()
2662 				       dst_prog)) {  in bpf_prog_load()
2663 		if (dst_prog)  in bpf_prog_load()
2664 			bpf_prog_put(dst_prog);  in bpf_prog_load()
2673 		if (dst_prog)  in bpf_prog_load()
2674 			bpf_prog_put(dst_prog);  in bpf_prog_load()
2683 	prog->aux->dst_prog = dst_prog;  in bpf_prog_load()
2721 	if (type == BPF_PROG_TYPE_EXT && dst_prog &&  in bpf_prog_load()
2722 	    bpf_prog_is_dev_bound(dst_prog->aux)) {  in bpf_prog_load()
2723 		err = bpf_prog_dev_bound_inherit(prog, dst_prog);  in bpf_prog_load()
3264 		tgt_prog = prog->aux->dst_prog;  in bpf_tracing_prog_attach()
3285 	if (prog->aux->dst_prog &&  in bpf_tracing_prog_attach()
3288 		bpf_prog_put(prog->aux->dst_prog);  in bpf_tracing_prog_attach()
3293 	prog->aux->dst_prog = NULL;  in bpf_tracing_prog_attach()