WARNING: line length of 84 exceeds 80 columns
#26: FILE: tools/testing/selftests/bpf/progs/string_kfuncs_success.c:34:
+__test(0) int test_strnstr_found(void *ctx) { return bpf_strnstr(str, "hello", 5); }

total: 0 errors, 1 warnings, 0 checks, 8 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 3565f9fbcb05 ("selftests/bpf: Add tests for bpf_strnstr") 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, 1 warnings, 0 checks, 8 lines checked