376  * blk_queue_alignment_offset - set physical block alignment offset
378  * @offset: alignment offset in bytes
497 	unsigned int alignment = sector_div(sector, granularity >> SECTOR_SHIFT)  in queue_limit_alignment_offset()  local
500 	return (granularity + lim->alignment_offset - alignment) % granularity;  in queue_limit_alignment_offset()
506 	unsigned int alignment, granularity, offset;  in queue_limit_discard_alignment()  local
512 	alignment = lim->discard_alignment >> SECTOR_SHIFT;  in queue_limit_discard_alignment()
521 	offset = (granularity + alignment - offset) % granularity;  in queue_limit_discard_alignment()
547  *    attempt to combine the values and ensure proper alignment.
550  *    top device's block sizes and alignment offsets may be adjusted to
551  *    ensure alignment with the bottom device. If no compatible sizes
559 	unsigned int top, bottom, alignment, ret = 0;  in blk_stack_limits()  local
586 	alignment = queue_limit_alignment_offset(b, start);  in blk_stack_limits()
588 	/* Bottom device has different alignment.  Check that it is  in blk_stack_limits()
589 	 * compatible with the current top alignment.  in blk_stack_limits()
591 	if (t->alignment_offset != alignment) {  in blk_stack_limits()
595 		bottom = max(b->physical_block_size, b->io_min) + alignment;  in blk_stack_limits()
651 	t->alignment_offset = lcm_not_zero(t->alignment_offset, alignment)  in blk_stack_limits()
664 	/* Discard alignment and granularity */  in blk_stack_limits()
666 		alignment = queue_limit_discard_alignment(b, start);  in blk_stack_limits()
669 		    t->discard_alignment != alignment) {  in blk_stack_limits()
671 			bottom = b->discard_granularity + alignment;  in blk_stack_limits()
684 		t->discard_alignment = lcm_not_zero(t->discard_alignment, alignment) %  in blk_stack_limits()
774  * blk_queue_dma_alignment - set dma length and memory alignment
776  * @mask:  alignment mask
779  *    set required memory and length alignment for direct dma transactions.
790  * blk_queue_update_dma_alignment - update dma length and memory alignment
792  * @mask:  alignment mask
795  *    update required memory and length alignment for direct dma transactions.
796  *    If the requested alignment is larger than the current alignment, then
797  *    the current queue alignment is updated to the new value, otherwise it