312 	 * By default there is no limit on the segment boundary alignment,  in blk_validate_limits()
444 	unsigned int alignment = sector_div(sector, granularity >> SECTOR_SHIFT)  in queue_limit_alignment_offset()  local
447 	return (granularity + lim->alignment_offset - alignment) % granularity;  in queue_limit_alignment_offset()
453 	unsigned int alignment, granularity, offset;  in queue_limit_discard_alignment()  local
459 	alignment = lim->discard_alignment >> SECTOR_SHIFT;  in queue_limit_discard_alignment()
468 	offset = (granularity + alignment - offset) % granularity;  in queue_limit_discard_alignment()
494  *    attempt to combine the values and ensure proper alignment.
497  *    top device's block sizes and alignment offsets may be adjusted to
498  *    ensure alignment with the bottom device. If no compatible sizes
506 	unsigned int top, bottom, alignment, ret = 0;  in blk_stack_limits()  local
547 	alignment = queue_limit_alignment_offset(b, start);  in blk_stack_limits()
549 	/* Bottom device has different alignment.  Check that it is  in blk_stack_limits()
550 	 * compatible with the current top alignment.  in blk_stack_limits()
552 	if (t->alignment_offset != alignment) {  in blk_stack_limits()
556 		bottom = max(b->physical_block_size, b->io_min) + alignment;  in blk_stack_limits()
608 	t->alignment_offset = lcm_not_zero(t->alignment_offset, alignment)  in blk_stack_limits()
621 	/* Discard alignment and granularity */  in blk_stack_limits()
623 		alignment = queue_limit_discard_alignment(b, start);  in blk_stack_limits()
631 		t->discard_alignment = lcm_not_zero(t->discard_alignment, alignment) %  in blk_stack_limits()
659  *    attempt to combine the values and ensure proper alignment.