WARNING: line length of 87 exceeds 80 columns
#35: FILE: kernel/bpf/helpers.c:3115:
+BTF_ID_FLAGS(func, bpf_iter_kmem_cache_next, KF_ITER_NEXT | KF_RET_NULL | KF_SLEEPABLE)

WARNING: Prefer __aligned(8) over __attribute__((aligned(8)))
#51: FILE: kernel/bpf/kmem_cache_iter.c:151:
+} __attribute__((aligned(8)));

WARNING: Prefer __aligned(8) over __attribute__((aligned(8)))
#55: FILE: kernel/bpf/kmem_cache_iter.c:155:
+} __attribute__((aligned(8)));

WARNING: line length of 87 exceeds 80 columns
#70: FILE: kernel/bpf/kmem_cache_iter.c:170:
+__bpf_kfunc struct kmem_cache *bpf_iter_kmem_cache_next(struct bpf_iter_kmem_cache *it)

CHECK: Comparison to NULL could be written "!prev"
#84: FILE: kernel/bpf/kmem_cache_iter.c:184:
+	if (prev == NULL)

CHECK: Comparison to NULL could be written "!s"
#116: FILE: kernel/bpf/kmem_cache_iter.c:216:
+	if (s == NULL)

total: 0 errors, 4 warnings, 2 checks, 102 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 6a02fee02f50 ("bpf: Add open coded version of 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, 4 warnings, 2 checks, 102 lines checked