JOURNAL_BLOCK_SECTORS
sector = section * ic->journal_section_sectors + JOURNAL_BLOCK_SECTORS + offset;
#define JOURNAL_MAC_SIZE (JOURNAL_MAC_PER_SECTOR * JOURNAL_BLOCK_SECTORS)
ic->journal_section_entries = ic->journal_entries_per_sector * JOURNAL_BLOCK_SECTORS;
ic->journal_section_sectors = (ic->journal_section_entries << ic->sb->log2_sectors_per_block) + JOURNAL_BLOCK_SECTORS;
rel_sector = n % JOURNAL_BLOCK_SECTORS;
offset = n / JOURNAL_BLOCK_SECTORS;
n += JOURNAL_BLOCK_SECTORS;
for (j = 0; j < JOURNAL_BLOCK_SECTORS; j++) {