WARNING: Block comments use a trailing */ on a separate line
#53: FILE: tools/lib/bpf/btf.c:5845:
+	 * type ID, its length equals to the above ids */

WARNING: line length of 82 exceeds 80 columns
#61: FILE: tools/lib/bpf/btf.c:5853:
+int btf__permute(struct btf *btf, __u32 *ids, const struct btf_permute_opts *opts)

WARNING: line length of 81 exceeds 80 columns
#199: FILE: tools/lib/bpf/btf.c:5991:
+	return btf_remap_types(p->btf, p->btf_ext, btf_permute_remap_type_id, p);

ERROR: space prohibited before that ':' (ctx:WxV)
#214: FILE: tools/lib/bpf/btf.h:280:
+	size_t :0;
 	       ^

CHECK: Please use a blank line after function/struct/union/enum declarations
#216: FILE: tools/lib/bpf/btf.h:282:
+};
+#define btf_permute_opts__last_field btf_ext

WARNING: line length of 89 exceeds 80 columns
#219: FILE: tools/lib/bpf/btf.h:285:
+ * @brief **btf__permute()** rearranges BTF types in-place according to specified mapping

WARNING: line length of 89 exceeds 80 columns
#221: FILE: tools/lib/bpf/btf.h:287:
+ * @param ids Array defining new type order. Must contain exactly btf->nr_types elements,

WARNING: line length of 96 exceeds 80 columns
#222: FILE: tools/lib/bpf/btf.h:288:
+ *        each being a valid type ID in range [btf->start_id, btf->start_id + btf->nr_types - 1]

WARNING: line length of 86 exceeds 80 columns
#223: FILE: tools/lib/bpf/btf.h:289:
+ * @param opts Optional parameters, including BTF extension data for reference updates

WARNING: line length of 85 exceeds 80 columns
#226: FILE: tools/lib/bpf/btf.h:292:
+ * **btf__permute()** performs an in-place permutation of BTF types, rearranging them

WARNING: line length of 90 exceeds 80 columns
#227: FILE: tools/lib/bpf/btf.h:293:
+ * according to the order specified in @p ids array. After reordering, all type references

WARNING: line length of 86 exceeds 80 columns
#228: FILE: tools/lib/bpf/btf.h:294:
+ * within the BTF data and optional BTF extension are updated to maintain consistency.

WARNING: line length of 83 exceeds 80 columns
#234: FILE: tools/lib/bpf/btf.h:300:
+ * This is particularly useful for optimizing type locality after BTF deduplication

WARNING: line length of 96 exceeds 80 columns
#239: FILE: tools/lib/bpf/btf.h:305:
+ *   - -EINVAL: Invalid parameters or invalid ID mapping (e.g., duplicate IDs, out-of-range IDs)

WARNING: line length of 94 exceeds 80 columns
#242: FILE: tools/lib/bpf/btf.h:308:
+LIBBPF_API int btf__permute(struct btf *btf, __u32 *ids, const struct btf_permute_opts *opts);

total: 1 errors, 13 warnings, 1 checks, 209 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 41965959a607 ("libbpf: Add BTF permutation support for type reordering") 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.