WARNING: line length of 90 exceeds 80 columns
#139: FILE: tools/testing/selftests/net/msg_zerocopy.c:241:
+			/* Although only the address of the array will be written into the

WARNING: line length of 93 exceeds 80 columns
#140: FILE: tools/testing/selftests/net/msg_zerocopy.c:242:
+			 * zc_ckbuf, msg_controllen must be larger or equal than any cmsg_len

CHECK: braces {} should be used on all arms of this statement
#181: FILE: tools/testing/selftests/net/msg_zerocopy.c:459:
+		if (zerocopied == -1)
[...]
+		else if (zerocopied != zerocopy) {
[...]

CHECK: Alignment should match open parenthesis
#207: FILE: tools/testing/selftests/net/msg_zerocopy.c:638:
+		if (cfg_zerocopy == ZC_MSGERR_NOTIFICATION &&
+			sendmsg_counter >= cfg_notification_limit)

WARNING: line length of 86 exceeds 80 columns
#252: FILE: tools/testing/selftests/net/msg_zerocopy.c:871:
+			error(1, 0, "PF_RDS does not support ZC_MSGCTL_NOTIFICATION");

total: 0 errors, 3 warnings, 2 checks, 198 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 b4c5666f85f7 ("selftests: add MSG_ZEROCOPY msg_control notification test") 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, 2 checks, 198 lines checked