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block: remove bounce buffering support

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The block layer bounce buffering support is unused now, remove it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20250505081138.3435992-7-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2025-05-05 10:11:25 +02:00
committed by Jens Axboe
parent a9437f6a1d
commit eeadd68e2a
12 changed files with 3 additions and 327 deletions
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5
include/linux/blkdev.h
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@@ -331,9 +331,6 @@ typedef unsigned int __bitwise blk_features_t;
/* skip this queue in blk_mq_(un)quiesce_tagset */
#define BLK_FEAT_SKIP_TAGSET_QUIESCE ((__force blk_features_t)(1u << 13))
/* bounce all highmem pages */
#define BLK_FEAT_BOUNCE_HIGH ((__force blk_features_t)(1u << 14))
/* undocumented magic for bcache */
#define BLK_FEAT_RAID_PARTIAL_STRIPES_EXPENSIVE \
((__force blk_features_t)(1u << 15))
@@ -347,7 +344,7 @@ typedef unsigned int __bitwise blk_features_t;
*/
#define BLK_FEAT_INHERIT_MASK \
(BLK_FEAT_WRITE_CACHE | BLK_FEAT_FUA | BLK_FEAT_ROTATIONAL | \
BLK_FEAT_STABLE_WRITES | BLK_FEAT_ZONED | BLK_FEAT_BOUNCE_HIGH | \
BLK_FEAT_STABLE_WRITES | BLK_FEAT_ZONED | \
BLK_FEAT_RAID_PARTIAL_STRIPES_EXPENSIVE)
/* internal flags in queue_limits.flags */