WARNING: line length of 90 exceeds 80 columns
#159: FILE: kernel/bpf/btf.c:1583:
+static int btf_add_type(struct btf *btf, struct btf_verifier_env *env, struct btf_type *t)

WARNING: line length of 99 exceeds 80 columns
#173: FILE: kernel/bpf/btf.c:1629:
+	struct btf_type *t = kmalloc(sizeof(struct btf_type) + sizeof(struct btf_var), GFP_KERNEL);

CHECK: Please don't use multiple blank lines
#463: FILE: kernel/bpf/btf.c:5956:
+
+

total: 0 errors, 2 warnings, 1 checks, 447 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 500a174c91cb ("bpf: Port prerequiste BTF handling functions from userspace") 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, 447 lines checked