bitset_size
ws->bits = vzalloc(bitset_size(nr_blocks));
memset(ws->bits, 0, bitset_size(nr_blocks));
size_t bitset_size, buf_size;
bitset_size = dm_round_up(region_count, BITS_PER_LONG);
bitset_size >>= BYTE_SHIFT;
lc->bitset_uint32_count = bitset_size / sizeof(*lc->clean_bits);
lc->clean_bits = vmalloc(bitset_size);
dm_round_up((LOG_OFFSET << SECTOR_SHIFT) + bitset_size,
memset(lc->clean_bits, -1, bitset_size);
lc->sync_bits = vmalloc(bitset_size);
memset(lc->sync_bits, (sync == NOSYNC) ? -1 : 0, bitset_size);
lc->recovering_bits = vzalloc(bitset_size);