CHECK: Alignment should match open parenthesis
#132: FILE: tools/testing/selftests/net/msg_zerocopy.c:221:
+static bool do_sendmsg(int fd, struct msghdr *msg,
+			   enum notification_type do_zerocopy, int domain)

WARNING: line length of 95 exceeds 80 columns
#174: FILE: tools/testing/selftests/net/msg_zerocopy.c:449:
+	for (i = 0; i < SOCK_ZC_INFO_MAX && zc_info[i].zerocopy != INVALID_ZEROCOPY_VAL; i++) {

CHECK: braces {} should be used on all arms of this statement
#187: FILE: tools/testing/selftests/net/msg_zerocopy.c:462:
+		if (zerocopied == -1)
[...]
+		else if (zerocopied != zerocopy) {
[...]

CHECK: Alignment should match open parenthesis
#213: FILE: tools/testing/selftests/net/msg_zerocopy.c:641:
+		if (cfg_zerocopy == MSG_ZEROCOPY_NOTIFY_ERRQUEUE &&
+			sends_since_notify >= cfg_notification_limit)

WARNING: line length of 91 exceeds 80 columns
#258: FILE: tools/testing/selftests/net/msg_zerocopy.c:874:
+			error(1, 0, "PF_RDS does not support MSG_ZEROCOPY_NOTIFY_SENDMSG");

total: 0 errors, 2 warnings, 3 checks, 204 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 0c13645fa6a8 ("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, 2 warnings, 3 checks, 204 lines checked