2604 			   struct bpf_prog *dst_prog)  in bpf_prog_load_check_attach()  argument
2610 		if (!attach_btf && !dst_prog)  in bpf_prog_load_check_attach()
2624 	if (attach_btf && (!btf_id || dst_prog))  in bpf_prog_load_check_attach()
2627 	if (dst_prog && prog_type != BPF_PROG_TYPE_TRACING &&  in bpf_prog_load_check_attach()
2762 	struct bpf_prog *prog, *dst_prog = NULL;  in bpf_prog_load()  local
2838 		dst_prog = bpf_prog_get(attr->attach_prog_fd);  in bpf_prog_load()
2839 		if (IS_ERR(dst_prog)) {  in bpf_prog_load()
2840 			dst_prog = NULL;  in bpf_prog_load()
2871 				       dst_prog)) {  in bpf_prog_load()
2872 		if (dst_prog)  in bpf_prog_load()
2873 			bpf_prog_put(dst_prog);  in bpf_prog_load()
2883 		if (dst_prog)  in bpf_prog_load()
2884 			bpf_prog_put(dst_prog);  in bpf_prog_load()
2895 	prog->aux->dst_prog = dst_prog;  in bpf_prog_load()
2932 	if (type == BPF_PROG_TYPE_EXT && dst_prog &&  in bpf_prog_load()
2933 	    bpf_prog_is_dev_bound(dst_prog->aux)) {  in bpf_prog_load()
2934 		err = bpf_prog_dev_bound_inherit(prog, dst_prog);  in bpf_prog_load()
2950 	if (type == BPF_PROG_TYPE_TRACING && dst_prog &&  in bpf_prog_load()
2951 	    dst_prog->type == BPF_PROG_TYPE_TRACING) {  in bpf_prog_load()
3584 		tgt_prog = prog->aux->dst_prog;  in bpf_tracing_prog_attach()
3605 	if (prog->aux->dst_prog &&  in bpf_tracing_prog_attach()
3608 		bpf_prog_put(prog->aux->dst_prog);  in bpf_tracing_prog_attach()
3613 	prog->aux->dst_prog = NULL;  in bpf_tracing_prog_attach()