WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#47: 
new file mode 100644

CHECK: Comparison to NULL could be written "!ctx.s"
#120: FILE: kernel/bpf/kmem_cache_iter.c:69:
+	if (ctx.s == NULL)

WARNING: line length of 81 exceeds 80 columns
#137: FILE: kernel/bpf/kmem_cache_iter.c:86:
+static void *kmem_cache_iter_seq_next(struct seq_file *seq, void *v, loff_t *pos)

WARNING: line length of 82 exceeds 80 columns
#221: FILE: kernel/bpf/kmem_cache_iter.c:170:
+	bpf_kmem_cache_reg_info.ctx_arg_info[0].btf_id = bpf_kmem_cache_btf_id[0];

total: 0 errors, 3 warnings, 1 checks, 184 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 af1a9fb91d15 ("bpf: Add kmem_cache iterator") 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, 184 lines checked