WARNING: line length of 90 exceeds 80 columns
#30: FILE: tools/testing/selftests/bpf/prog_tests/stacktrace_map.c:6:
+	int control_map_fd, stackid_hmap_fd, stackmap_fd, stack_amap_fd, stack_key_map_fd;

WARNING: line length of 83 exceeds 80 columns
#63: FILE: tools/testing/selftests/bpf/prog_tests/stacktrace_map.c:82:
+	err = bpf_map_lookup_and_delete_elem(stackmap_fd, &stackmap_key, &val_buf);

total: 0 errors, 2 warnings, 0 checks, 72 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 086a1098df1c ("selftests/bpf: Add stacktrace map lookup_and_delete_elem test case") 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, 0 checks, 72 lines checked