CHECK: Alignment should match open parenthesis
#42: FILE: include/linux/skbuff.h:4966:
+int skb_trait_set(struct sk_buff *skb, u64 key,
+			const void *val, u64 val__sz, u64 flags);

CHECK: Alignment should match open parenthesis
#45: FILE: include/linux/skbuff.h:4969:
+int skb_trait_get(const struct sk_buff *skb, u64 key,
+			void *val, u64 val__sz);

WARNING: line length of 99 exceeds 80 columns
#89: FILE: net/core/skbuff.c:7241:
+		return SKB_EXT_CHUNKS_BYTES(skb->extensions->chunks - skb->extensions->offset[id]);

WARNING: line length of 83 exceeds 80 columns
#122: FILE: net/core/skbuff.c:7274:
+		err = trait_set(traits, traits + skb_ext_size(skb, SKB_EXT_TRAITS),

WARNING: line length of 93 exceeds 80 columns
#176: FILE: net/core/skbuff.c:7328:
+	return register_btf_kfunc_id_set(BPF_PROG_TYPE_SOCKET_FILTER, &bpf_traits_kfunc_set);

total: 0 errors, 3 warnings, 2 checks, 150 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 bc9ea8354df9 ("trait: Allow socket filters to access traits") 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, 2 checks, 150 lines checked