CHECK: Alignment should match open parenthesis
#36: FILE: tools/testing/selftests/bpf/bpf_testmod/bpf_testmod-events.h:39:
+DECLARE_TRACE(bpf_testmod_test_nullable_bare,
+	TP_PROTO(struct bpf_testmod_test_read_ctx *ctx__nullable),

WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#57: 
new file mode 100644

WARNING: line length of 90 exceeds 80 columns
#92: FILE: tools/testing/selftests/bpf/progs/test_tp_btf_nullable.c:11:
+int BPF_PROG(handle_tp_btf_nullable_bare1, struct bpf_testmod_test_read_ctx *nullable_ctx)

WARNING: line length of 90 exceeds 80 columns
#98: FILE: tools/testing/selftests/bpf/progs/test_tp_btf_nullable.c:17:
+int BPF_PROG(handle_tp_btf_nullable_bare2, struct bpf_testmod_test_read_ctx *nullable_ctx)

total: 0 errors, 3 warnings, 1 checks, 58 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 fba0cc3b2645 ("selftests/bpf: Add test for __nullable suffix in tp_btf") 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, 3 warnings, 1 checks, 58 lines checked