diff options
| -rw-r--r-- | block/blk-settings.c | 35 | ||||
| -rw-r--r-- | include/linux/blkdev.h | 34 |
2 files changed, 36 insertions, 33 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c index 94410a13c0de..fd83d674afd0 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -478,6 +478,30 @@ static int queue_limit_alignment_offset(struct queue_limits *lim, return (granularity + lim->alignment_offset - alignment) % granularity; } +static unsigned int queue_limit_discard_alignment(struct queue_limits *lim, + sector_t sector) +{ + unsigned int alignment, granularity, offset; + + if (!lim->max_discard_sectors) + return 0; + + /* Why are these in bytes, not sectors? */ + alignment = lim->discard_alignment >> SECTOR_SHIFT; + granularity = lim->discard_granularity >> SECTOR_SHIFT; + if (!granularity) + return 0; + + /* Offset of the partition start in 'granularity' sectors */ + offset = sector_div(sector, granularity); + + /* And why do we do this modulus *again* in blkdev_issue_discard()? */ + offset = (granularity + alignment - offset) % granularity; + + /* Turn it back into bytes, gaah */ + return offset << SECTOR_SHIFT; +} + static unsigned int blk_round_down_sectors(unsigned int sectors, unsigned int lbs) { sectors = round_down(sectors, lbs >> SECTOR_SHIFT); @@ -924,3 +948,14 @@ int bdev_alignment_offset(struct block_device *bdev) return q->limits.alignment_offset; } EXPORT_SYMBOL_GPL(bdev_alignment_offset); + +unsigned int bdev_discard_alignment(struct block_device *bdev) +{ + struct request_queue *q = bdev_get_queue(bdev); + + if (bdev_is_partition(bdev)) + return queue_limit_discard_alignment(&q->limits, + bdev->bd_start_sect); + return q->limits.discard_alignment; +} +EXPORT_SYMBOL_GPL(bdev_discard_alignment); diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 5a9b7aeda010..34b1cfd06742 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1252,39 +1252,7 @@ bdev_zone_write_granularity(struct block_device *bdev) } int bdev_alignment_offset(struct block_device *bdev); - -static inline int queue_limit_discard_alignment(struct queue_limits *lim, sector_t sector) -{ - unsigned int alignment, granularity, offset; - - if (!lim->max_discard_sectors) - return 0; - - /* Why are these in bytes, not sectors? */ - alignment = lim->discard_alignment >> SECTOR_SHIFT; - granularity = lim->discard_granularity >> SECTOR_SHIFT; - if (!granularity) - return 0; - - /* Offset of the partition start in 'granularity' sectors */ - offset = sector_div(sector, granularity); - - /* And why do we do this modulus *again* in blkdev_issue_discard()? */ - offset = (granularity + alignment - offset) % granularity; - - /* Turn it back into bytes, gaah */ - return offset << SECTOR_SHIFT; -} - -static inline int bdev_discard_alignment(struct block_device *bdev) -{ - struct request_queue *q = bdev_get_queue(bdev); - - if (bdev_is_partition(bdev)) - return queue_limit_discard_alignment(&q->limits, - bdev->bd_start_sect); - return q->limits.discard_alignment; -} +unsigned int bdev_discard_alignment(struct block_device *bdev); static inline unsigned int bdev_write_zeroes_sectors(struct block_device *bdev) { |