next_boundary
gap = next_boundary(addr, end) - addr;
dm_block_t len, next_boundary;
next_boundary = ((data_begin >> BIO_PRISON_MAX_RANGE_SHIFT) + 1)
len = min_t(sector_t, data_end - data_begin, next_boundary - data_begin);
sector_t next_boundary =
if (next_boundary < bio->bi_iter.bi_size >> SECTOR_SHIFT)
dm_accept_partial_bio(bio, next_boundary);
unsigned int next_boundary = pool->boundary, offset = 0;
if (offset + pool->size > next_boundary) {
offset = next_boundary;
next_boundary += pool->boundary;