WARNING: line length of 84 exceeds 80 columns
#50: FILE: net/mptcp/mib.h:17:
+	MPTCP_MIB_JOINSYNBACKUPRX,	/* Received a SYN + MP_JOIN + backup flag */

WARNING: line length of 88 exceeds 80 columns
#52: FILE: net/mptcp/mib.h:19:
+	MPTCP_MIB_JOINSYNACKBACKUPRX,	/* Received a SYN/ACK + MP_JOIN + backup flag */

WARNING: line length of 84 exceeds 80 columns
#75: FILE: net/mptcp/subflow.c:584:
+			MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_JOINSYNACKBACKUPRX);

total: 0 errors, 3 warnings, 0 checks, 36 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 3310139dd621 ("mptcp: mib: count MPJ with backup flag") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE 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, 0 checks, 36 lines checked