WARNING: line length of 91 exceeds 80 columns
#155: FILE: tools/testing/selftests/bpf/test_progs.c:484:
+		printf("IPv4 ICMP packet: %s -> %s, len %d, type %d, code %d, ifname %s\n",

WARNING: line length of 93 exceeds 80 columns
#159: FILE: tools/testing/selftests/bpf/test_progs.c:488:
+		printf("IPv6 ICMPv6 packet: %s -> %s, len %d, type %d, code %d, ifname %s\n",

WARNING: else is not generally useful after a break or return
#162: FILE: tools/testing/selftests/bpf/test_progs.c:491:
+		return;
+	} else {

WARNING: line length of 82 exceeds 80 columns
#164: FILE: tools/testing/selftests/bpf/test_progs.c:493:
+		       ipv6 ? "IPv6" : "IPv4", proto, src_addr, dst_addr, ifname);

WARNING: line length of 94 exceeds 80 columns
#256: FILE: tools/testing/selftests/bpf/test_progs.c:585:
+			log_err("Fail to select on pcap fd and wake fd: %s", strerror(errno));

WARNING: line length of 91 exceeds 80 columns
#299: FILE: tools/testing/selftests/bpf/test_progs.c:628:
+				snprintf(_ifname, sizeof(_ifname), "unknown(%d)", ifindex);

WARNING: line length of 95 exceeds 80 columns
#303: FILE: tools/testing/selftests/bpf/test_progs.c:632:
+			printf("Unknown network protocol type %x, ifname %s\n", proto, ifname);

WARNING: line length of 82 exceeds 80 columns
#372: FILE: tools/testing/selftests/bpf/test_progs.c:701:
+		snprintf(buf, len, "%s:%s", test->test_name, subtest_state->name);

total: 0 errors, 8 warnings, 0 checks, 479 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 f9b97b5e4582 ("selftests/bpf: Add traffic monitor functions.") 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, 8 warnings, 0 checks, 479 lines checked