CHECK: Concatenated strings should use spaces between elements
#73: FILE: tools/testing/selftests/bpf/assert_helpers.h:40:
+	CHECK(false, "", fmt"\n", ##args);				\

CHECK: Comparison to NULL could be written "strstr"
#184: FILE: tools/testing/selftests/bpf/assert_helpers.h:151:
+	bool ___ok = strstr(___str, ___substr) != NULL;			\

total: 0 errors, 0 warnings, 2 checks, 469 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 4522ea295c17 ("bpf/selftests: move assert macros into a dedicated header") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE FILE_PATH_CHANGES 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, 0 warnings, 2 checks, 469 lines checked