CHECK: No space is necessary after a cast
#108: FILE: include/net/tcp.h:934:
+	return (u32) win;

WARNING: line length of 90 exceeds 80 columns
#139: FILE: net/ipv4/tcp.c:5279:
+	CACHELINE_ASSERT_GROUP_MEMBER(struct tcp_sock, tcp_sock_write_txrx, rcv_mwnd_seq);

WARNING: line length of 81 exceeds 80 columns
#170: FILE: net/ipv4/tcp_input.c:4815:
+	if (unlikely(after(end_seq, tp->rcv_nxt + tcp_max_receive_window(tp)))) {

WARNING: line length of 84 exceeds 80 columns
#175: FILE: net/ipv4/tcp_input.c:4819:
+		if (!after(end_seq - th->fin, tp->rcv_nxt + tcp_receive_window(tp)))

total: 0 errors, 3 warnings, 1 checks, 138 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

Commit 83244c991b9e ("tcp: implement RFC 7323 window retraction receiver requirements") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE FILE_PATH_CHANGES GIT_COMMIT_ID MACRO_ARG_REUSE NO_AUTHOR_SIGN_OFF

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.
total: 0 errors, 3 warnings, 1 checks, 138 lines checked