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block: remove the discard_alignment flag

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queue_limits.discard_alignment is never read except in the places
where it is stacked into another limit.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20240619154623.450048-6-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2024-06-19 17:45:37 +02:00 committed by Jens Axboe
parent 5543217be4
commit 4cac3d3a71
5 changed files with 0 additions and 14 deletions
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10
block/blk-settings.c
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@ -578,16 +578,6 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
if (b->discard_granularity) {
alignment = queue_limit_discard_alignment(b, start);
if (t->discard_granularity != 0 &&
t->discard_alignment != alignment) {
top = t->discard_granularity + t->discard_alignment;
bottom = b->discard_granularity + alignment;
/* Verify that top and bottom intervals line up */
if ((max(top, bottom) % min(top, bottom)) != 0)
t->discard_misaligned = 1;
}
t->max_discard_sectors = min_not_zero(t->max_discard_sectors,
b->max_discard_sectors);
t->max_hw_discard_sectors = min_not_zero(t->max_hw_discard_sectors,

1
drivers/md/dm-cache-target.c
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@ -3403,7 +3403,6 @@ static void set_discard_limits(struct cache *cache, struct queue_limits *limits)
limits->max_hw_discard_sectors = origin_limits->max_hw_discard_sectors;
limits->discard_granularity = origin_limits->discard_granularity;
limits->discard_alignment = origin_limits->discard_alignment;
limits->discard_misaligned = origin_limits->discard_misaligned;
}
static void cache_io_hints(struct dm_target *ti, struct queue_limits *limits)

1
drivers/md/dm-clone-target.c
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@ -2059,7 +2059,6 @@ static void set_discard_limits(struct clone *clone, struct queue_limits *limits)
limits->max_hw_discard_sectors = dest_limits->max_hw_discard_sectors;
limits->discard_granularity = dest_limits->discard_granularity;
limits->discard_alignment = dest_limits->discard_alignment;
limits->discard_misaligned = dest_limits->discard_misaligned;
limits->max_discard_segments = dest_limits->max_discard_segments;
}

1
drivers/md/dm-table.c
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@ -1808,7 +1808,6 @@ int dm_table_set_restrictions(struct dm_table *t, struct request_queue *q,
limits->max_hw_discard_sectors = 0;
limits->discard_granularity = 0;
limits->discard_alignment = 0;
limits->discard_misaligned = 0;
}
if (!dm_table_supports_write_zeroes(t))

1
include/linux/blkdev.h
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@ -377,7 +377,6 @@ struct queue_limits {
unsigned short max_integrity_segments;
unsigned short max_discard_segments;
unsigned char discard_misaligned;
unsigned char raid_partial_stripes_expensive;
unsigned int max_open_zones;
unsigned int max_active_zones;