Commit c490f226 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
Browse files

block: decouple blk_set_stacking_limits from blk_set_default_limits 



blk_set_stacking_limits uses very little from blk_set_default_limits.
Open code these initializations in preparation for rewriting
blk_set_default_limits.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarDamien Le Moal <dlemoal@kernel.org>
Reviewed-by: default avatarHannes Reinecke <hare@suse.de>
Link: https://lore.kernel.org/r/20240213073425.1621680-4-hch@lst.de


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent b9947297

block/blk-settings.c

+9 −4
Original line number Diff line number Diff line
@@ -65,13 +65,18 @@ void blk_set_default_limits(struct queue_limits *lim) 
 * blk_set_stacking_limits - set default limits for stacking devices

 * @lim:  the queue_limits structure to reset

 *

 * Description:

 *   Returns a queue_limit struct to its default state. Should be used

 *   by stacking drivers like DM that have no internal limits.

 * Prepare queue limits for applying limits from underlying devices using

 * blk_stack_limits().

 */

void blk_set_stacking_limits(struct queue_limits *lim)

{

	blk_set_default_limits(lim);

	memset(lim, 0, sizeof(*lim));

	lim->logical_block_size = SECTOR_SIZE;

	lim->physical_block_size = SECTOR_SIZE;

	lim->io_min = SECTOR_SIZE;

	lim->discard_granularity = SECTOR_SIZE;

	lim->dma_alignment = SECTOR_SIZE - 1;

	lim->seg_boundary_mask = BLK_SEG_BOUNDARY_MASK;



	/* Inherit limits from component devices */

	lim->max_segments = USHRT_MAX;