ERROR: Bad function definition - const char* token_bpffs_custom_dir() should probably be const char* token_bpffs_custom_dir(void)
#30: FILE: tools/testing/selftests/bpf/prog_tests/token.c:831:
+static const char* token_bpffs_custom_dir() {

ERROR: "foo* bar" should be "foo *bar"
#30: FILE: tools/testing/selftests/bpf/prog_tests/token.c:831:
+static const char* token_bpffs_custom_dir() {

ERROR: open brace '{' following function definitions go on the next line
#30: FILE: tools/testing/selftests/bpf/prog_tests/token.c:831:
+static const char* token_bpffs_custom_dir() {

WARNING: line length of 88 exceeds 80 columns
#57: FILE: tools/testing/selftests/bpf/prog_tests/token.c:919:
+	err = sys_move_mount(mnt_fd, "", AT_FDCWD, custom_dir, MOVE_MOUNT_F_EMPTY_PATH);

total: 3 errors, 1 warnings, 0 checks, 53 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 d00773947f8f ("selftests/bpf: set test path for token/obj_priv_implicit_token_envvar") 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.