JOURNAL_SECTOR_DATA
__u8 entries[JOURNAL_SECTOR_DATA - JOURNAL_MAC_PER_SECTOR];
memcpy(mem_ptr, js, JOURNAL_SECTOR_DATA);
*(commit_id_t *)(mem_ptr + JOURNAL_SECTOR_DATA) = je->last_bytes[s];
BUILD_BUG_ON(sizeof(js->sectors) != JOURNAL_SECTOR_DATA);
unsigned int sector_space = JOURNAL_SECTOR_DATA;