WARNING: ENOTSUPP is not a SUSV4 error code, prefer EOPNOTSUPP
#126: FILE: kernel/bpf/trampoline.c:420:
+		return -ENOTSUPP;

WARNING: line length of 83 exceeds 80 columns
#137: FILE: kernel/bpf/trampoline.c:521:
+static int bpf_trampoline_update(struct bpf_trampoline *tr, bool lock_direct_mutex)

total: 0 errors, 2 warnings, 0 checks, 103 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 84ab56842b3f ("bpf: Enable BPF_LINK_UPDATE for fentry/fexit/fmod_ret links") 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, 2 warnings, 0 checks, 103 lines checked