erofs-freebsd-out-tree/docs/pre13-low-e.md

Pre13 L-E

The BSD-only miscellaneous erofs_defs.h has been removed. Its three owners now keep their constants in the files responsible for those values:

• super.c owns the named private CRC32C seed.
• dir.c uses sizeof(struct erofs_dirent) directly.
• decompressor_lz4.c owns its private LZ4 format constants.

The former header had exactly these three production source consumers. All constant values and use-site expressions remain equivalent. Two already retired userspace decompression test files still referenced the removed header; they were deleted because they also depended on obsolete userspace ABIs and did not compile independently. No current source or test entry retains the old include. The LZ4 macro names remain private to decompressor_lz4.c; the former shared CRC and dirent macro names have no current consumers. The current architecture file was updated; historical reports were not changed.

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