1871 	zc->copybuf_len = err;  in receive_fallback_to_copy()
1872 	if (likely(zc->copybuf_len)) {  in receive_fallback_to_copy()
1912 				  s32 copybuf_len,  in tcp_zc_handle_leftover()  argument
1915 	u32 offset, copylen = min_t(u32, copybuf_len, zc->recv_skip_hint);  in tcp_zc_handle_leftover()
1930 	zc->copybuf_len = tcp_copy_straggler_data(zc, skb, copylen, &offset,  in tcp_zc_handle_leftover()
1932 	return zc->copybuf_len < 0 ? 0 : copylen;  in tcp_zc_handle_leftover()
2075 	s32 copybuf_len = zc->copybuf_len;  in tcp_zerocopy_receive()  local
2087 	zc->copybuf_len = 0;  in tcp_zerocopy_receive()
2098 	if (inq && inq <= copybuf_len)  in tcp_zerocopy_receive()
2192 		copylen = tcp_zc_handle_leftover(zc, sk, skb, &seq, copybuf_len, tss);  in tcp_zerocopy_receive()
4224 		case offsetofend(struct tcp_zerocopy_receive, copybuf_len):  in do_tcp_getsockopt()