WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#42: 
new file mode 100644

WARNING: Prefer __noreturn over __attribute__((noreturn))
#73: FILE: tools/testing/selftests/net/so_rcv_listener.c:27:
+static void __attribute__((noreturn)) usage(const char *bin)

WARNING: line length of 86 exceeds 80 columns
#134: FILE: tools/testing/selftests/net/so_rcv_listener.c:88:
+	err = setsockopt(recv_fd, SOL_SOCKET, opt.rcvname, &opt.val, sizeof(opt.val));

WARNING: line length of 88 exceeds 80 columns
#174: FILE: tools/testing/selftests/net/so_rcv_listener.c:128:
+	for (cmsg = CMSG_FIRSTHDR(&msg); cmsg != NULL; cmsg = CMSG_NXTHDR(&msg, cmsg)) {

CHECK: Comparison to NULL could be written "cmsg"
#174: FILE: tools/testing/selftests/net/so_rcv_listener.c:128:
+	for (cmsg = CMSG_FIRSTHDR(&msg); cmsg != NULL; cmsg = CMSG_NXTHDR(&msg, cmsg)) {

WARNING: line length of 84 exceeds 80 columns
#175: FILE: tools/testing/selftests/net/so_rcv_listener.c:129:
+		if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == opt.name) {

WARNING: line length of 87 exceeds 80 columns
#180: FILE: tools/testing/selftests/net/so_rcv_listener.c:134:
+				fprintf(stderr, "Error: expected value: %u, got: %u\n",

total: 0 errors, 6 warnings, 1 checks, 210 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 cc17df906c51 ("selftests: net: Add support for testing SO_RCVMARK and SO_RCVPRIORITY") 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, 6 warnings, 1 checks, 210 lines checked