CHECK: Comparison to NULL could be written "fp"
#124: FILE: tools/testing/selftests/bpf/trace_helpers.c:73:
+	if (fp != NULL) {

CHECK: Comparison to NULL could be written "fgets"
#127: FILE: tools/testing/selftests/bpf/trace_helpers.c:76:
+		if (fgets(line, sizeof(line), fp) != NULL)

WARNING: line length of 90 exceeds 80 columns
#146: FILE: tools/testing/selftests/bpf/trace_helpers.c:129:
+		printf("ksyms restricted, please check /proc/sys/kernel/kptr_restrict\n");

WARNING: line length of 90 exceeds 80 columns
#158: FILE: tools/testing/selftests/bpf/trace_helpers.c:280:
+		printf("ksyms restricted, please check /proc/sys/kernel/kptr_restrict\n");

total: 0 errors, 2 warnings, 2 checks, 106 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 764b43499238 ("selftests/bpf:Enhance bpf ability to detect ksym read error by libcap") 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, 2 checks, 106 lines checked