WARNING: line length of 86 exceeds 80 columns
#166: FILE: tools/testing/selftests/bpf/network_helpers.c:709:
+		snprintf(log_name, sizeof(log_name), "/tmp/tmon_tcpdump_%d.log", pid);

WARNING: line length of 96 exceeds 80 columns
#182: FILE: tools/testing/selftests/bpf/network_helpers.c:725:
+		execlp("tcpdump", "tcpdump", "-i", "any", "-n", "--immediate-mode", "-l", NULL);

WARNING: line length of 88 exceeds 80 columns
#195: FILE: tools/testing/selftests/bpf/network_helpers.c:738:
+	snprintf(ctx->log_name, sizeof(ctx->log_name), "/tmp/tmon_tcpdump_%d.log", pid);

WARNING: line length of 86 exceeds 80 columns
#217: FILE: tools/testing/selftests/bpf/network_helpers.c:760:
+		snprintf(log_name, sizeof(log_name), "/tmp/tmon_tcpdump_%d.log", pid);

total: 0 errors, 4 warnings, 0 checks, 267 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 31c39ad88fa7 ("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, 4 warnings, 0 checks, 267 lines checked