# Pre13 L-C1

This batch aligns the endian type vocabulary of named multi-byte on-disk
fields with the corresponding Linux EROFS declarations.

Only fields for which the same Linux structure and field use `__le16`,
`__le32`, or `__le64` were changed. Byte fields, arrays, field order, unions,
packing, macros, and all read/conversion sites remain unchanged. The direct
disk-type parameter of `erofs_xattr_ibody_size()` was synchronized.

The FreeBSD compatibility aliases map each `__leXX` type to the exact previous
unsigned integer type. A host-side probe compared 119 structure/union
size/alignment and named-field offset entries before and after the batch; all
values were identical. `tests/pre13_ondisk_layout_probe.c` retains legacy
definitions and exhaustive assertions for every modified structure so the
same proof can be compiled with the final FreeBSD guest toolchain. Existing
kernel `_Static_assert` checks remain unchanged.

No KLD build, QEMU, smoke, or feature test was run for this batch.