WARNING: line length of 83 exceeds 80 columns
#46: FILE: tools/testing/selftests/bpf/bpf_experimental.h:23:
+extern __must_check void *bpf_obj_new_impl(__u64 local_type_id, void *meta) __ksym;

CHECK: extern prototypes should be avoided in .h files
#46: FILE: tools/testing/selftests/bpf/bpf_experimental.h:23:
+extern __must_check void *bpf_obj_new_impl(__u64 local_type_id, void *meta) __ksym;

WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
#76: FILE: tools/testing/selftests/bpf/progs/linked_list_fail.c:230:
+	(void)bpf_obj_new(union { int data; unsigned udata; });

total: 0 errors, 2 warnings, 1 checks, 50 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 591f574320ed ("selftests/bpf: Annotate bpf_obj_new_impl() with __must_check") 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, 1 checks, 50 lines checked