WARNING: line length of 99 exceeds 80 columns
#66: FILE: tools/lib/bpf/btf.c:3046:
+static int info_subsec_bswap_metadata(const struct btf_ext *btf_ext, struct btf_ext_info *ext_info)

CHECK: Macro argument 'btf_ext' may be better as '(btf_ext)' to avoid precedence issues
#98: FILE: tools/lib/bpf/btf.c:3078:
+#define ORDER_INFO_BSWAP(btf_ext, ext_info, info_t, swap_fn)		\
+{									\
+	const bool is_native = btf_ext->swapped_endian;			\
+	struct btf_ext_info_sec *si;					\
+	int c, err;							\
+	info_t *i;							\
+	if (is_native)							\
+		for_each_btf_ext_sec(ext_info, si)			\
+			for_each_btf_ext_rec(ext_info, si, c, i)	\
+				swap_fn(i);				\
+	err = info_subsec_bswap_metadata(btf_ext, ext_info);		\
+	if (err) {							\
+		pr_warn(#info_t " record size mismatch!\n");		\
+		return err;						\
+	}								\
+	if (!is_native)							\
+		for_each_btf_ext_sec(ext_info, si)			\
+			for_each_btf_ext_rec(ext_info, si, c, i)	\
+				swap_fn(i);				\
+}

CHECK: Macro argument 'info_t' may be better as '(info_t)' to avoid precedence issues
#98: FILE: tools/lib/bpf/btf.c:3078:
+#define ORDER_INFO_BSWAP(btf_ext, ext_info, info_t, swap_fn)		\
+{									\
+	const bool is_native = btf_ext->swapped_endian;			\
+	struct btf_ext_info_sec *si;					\
+	int c, err;							\
+	info_t *i;							\
+	if (is_native)							\
+		for_each_btf_ext_sec(ext_info, si)			\
+			for_each_btf_ext_rec(ext_info, si, c, i)	\
+				swap_fn(i);				\
+	err = info_subsec_bswap_metadata(btf_ext, ext_info);		\
+	if (err) {							\
+		pr_warn(#info_t " record size mismatch!\n");		\
+		return err;						\
+	}								\
+	if (!is_native)							\
+		for_each_btf_ext_sec(ext_info, si)			\
+			for_each_btf_ext_rec(ext_info, si, c, i)	\
+				swap_fn(i);				\
+}

WARNING: Macros with flow control statements should be avoided
#98: FILE: tools/lib/bpf/btf.c:3078:
+#define ORDER_INFO_BSWAP(btf_ext, ext_info, info_t, swap_fn)		\
+{									\
+	const bool is_native = btf_ext->swapped_endian;			\
+	struct btf_ext_info_sec *si;					\
+	int c, err;							\
+	info_t *i;							\
+	if (is_native)							\
+		for_each_btf_ext_sec(ext_info, si)			\
+			for_each_btf_ext_rec(ext_info, si, c, i)	\
+				swap_fn(i);				\
+	err = info_subsec_bswap_metadata(btf_ext, ext_info);		\
+	if (err) {							\
+		pr_warn(#info_t " record size mismatch!\n");		\
+		return err;						\
+	}								\
+	if (!is_native)							\
+		for_each_btf_ext_sec(ext_info, si)			\
+			for_each_btf_ext_rec(ext_info, si, c, i)	\
+				swap_fn(i);				\
+}

WARNING: line length of 83 exceeds 80 columns
#134: FILE: tools/lib/bpf/btf.c:3114:
+	ORDER_INFO_BSWAP(btf_ext, &ext, struct bpf_func_info, bpf_func_info_bswap);

WARNING: line length of 83 exceeds 80 columns
#141: FILE: tools/lib/bpf/btf.c:3121:
+	ORDER_INFO_BSWAP(btf_ext, &ext, struct bpf_line_info, bpf_line_info_bswap);

WARNING: line length of 83 exceeds 80 columns
#151: FILE: tools/lib/bpf/btf.c:3131:
+	ORDER_INFO_BSWAP(btf_ext, &ext, struct bpf_core_relo, bpf_core_relo_bswap);

CHECK: Please use a blank line after function/struct/union/enum declarations
#155: FILE: tools/lib/bpf/btf.c:3135:
+}
+#undef ORDER_INFO_BSWAP

WARNING: Missing a blank line after declarations
#226: FILE: tools/lib/bpf/btf.c:3204:
+		int err = btf_ext_bswap_info(btf_ext);
+		if (err)

WARNING: line length of 84 exceeds 80 columns
#315: FILE: tools/lib/bpf/btf.c:3320:
+		return btf_ext->swapped_endian ? BTF_LITTLE_ENDIAN : BTF_BIG_ENDIAN;

WARNING: line length of 84 exceeds 80 columns
#317: FILE: tools/lib/bpf/btf.c:3322:
+		return btf_ext->swapped_endian ? BTF_BIG_ENDIAN : BTF_LITTLE_ENDIAN;

WARNING: line length of 85 exceeds 80 columns
#325: FILE: tools/lib/bpf/btf.c:3330:
+	btf_ext->swapped_endian = is_host_big_endian() != (endian == BTF_BIG_ENDIAN);

WARNING: line length of 82 exceeds 80 columns
#344: FILE: tools/lib/bpf/btf.h:170:
+LIBBPF_API enum btf_endianness btf_ext__endianness(const struct btf_ext *btf_ext);

total: 0 errors, 10 warnings, 3 checks, 351 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 31de6e0e1428 ("libbpf: Support BTF.ext loading and output in either endianness") 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, 10 warnings, 3 checks, 351 lines checked