WARNING: line length of 85 exceeds 80 columns
#26: FILE: tools/lib/bpf/features.c:618:
+#define EXTEND_TYPE_LEN	((3 * sizeof(struct btf_type) + sizeof(__u32))/sizeof(__u32))

CHECK: spaces preferred around that '/' (ctx:VxV)
#26: FILE: tools/lib/bpf/features.c:618:
+#define EXTEND_TYPE_LEN	((3 * sizeof(struct btf_type) + sizeof(__u32))/sizeof(__u32))
                        	                                              ^

WARNING: line length of 92 exceeds 80 columns
#28: FILE: tools/lib/bpf/features.c:620:
+#define EXTEND_SECINFO_LEN	(EXTEND_VLEN * sizeof(struct btf_var_secinfo)/sizeof(__u32))

CHECK: spaces preferred around that '/' (ctx:VxV)
#28: FILE: tools/lib/bpf/features.c:620:
+#define EXTEND_SECINFO_LEN	(EXTEND_VLEN * sizeof(struct btf_var_secinfo)/sizeof(__u32))
                           	                                             ^

WARNING: line length of 81 exceeds 80 columns
#37: FILE: tools/lib/bpf/features.c:629:
+		BTF_TYPE_ENC(5 /* "foo" */, BTF_INFO_ENC(BTF_KIND_VAR, 0, 0), 1),

WARNING: line length of 95 exceeds 80 columns
#39: FILE: tools/lib/bpf/features.c:631:
+		BTF_TYPE_ENC(9 /* "bar" */, BTF_INFO_ENC(BTF_KIND_DATASEC, EXTEND_VLEN, 0), 0),

WARNING: line length of 81 exceeds 80 columns
#46: FILE: tools/lib/bpf/features.c:638:
+	types_data = calloc(EXTEND_TYPE_LEN + EXTEND_SECINFO_LEN, sizeof(__u32));

WARNING: line length of 99 exceeds 80 columns
#59: FILE: tools/lib/bpf/features.c:651:
+					    (EXTEND_TYPE_LEN + EXTEND_SECINFO_LEN) * sizeof(__u32),

WARNING: line length of 92 exceeds 80 columns
#74: FILE: tools/lib/bpf/features.c:743:
+		"kernel supports extended BTF vlen/kind", probe_kern_btf_vlen_kind_extended,

WARNING: line length of 88 exceeds 80 columns
#87: FILE: tools/lib/bpf/libbpf.c:3142:
+	bool has_vlen_kind_extended = kernel_supports(obj, FEAT_BTF_VLEN_KIND_EXTENDED);

WARNING: line length of 88 exceeds 80 columns
#100: FILE: tools/lib/bpf/libbpf.c:3160:
+	bool has_vlen_kind_extended = kernel_supports(obj, FEAT_BTF_VLEN_KIND_EXTENDED);

WARNING: line length of 90 exceeds 80 columns
#115: FILE: tools/lib/bpf/libbpf.c:3229:
+					 btf_kind(t) > 0x1f ? "BTF kind" : "BTF vlen", i);

total: 0 errors, 10 warnings, 2 checks, 101 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 7f573ce22d50 ("libbpf: Add feature for kernel extended vlen/kind support") 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, 10 warnings, 2 checks, 101 lines checked