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| author |   Martin K. Petersen <martin.petersen@oracle.com> | 2010-01-11 03:21:51 -0500 |
|---|---|---|
| committer |   Jens Axboe <jens.axboe@oracle.com> | 2010-01-11 14:30:09 +0100 |
| commit | e03a72e13648ac6277bf2bab6b8324d51f89c0fa (patch) | |
| tree | a01a2e072a5b225f22bd8bfa75f5270a527a4e4b /include/linux/blkdev.h | |
| parent | block: removed unused as_io_context (diff) | |
| download | linux-dev-e03a72e13648ac6277bf2bab6b8324d51f89c0fa.tar.xz linux-dev-e03a72e13648ac6277bf2bab6b8324d51f89c0fa.zip | |
block: Stop using byte offsets
All callers of the stacking functions use 512-byte sector units rather
than byte offsets. Simplify the code so the stacking functions take
sectors when specifying data offsets.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include/linux/blkdev.h')
| -rw-r--r-- | include/linux/blkdev.h | 17 |
1 files changed, 5 insertions, 12 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 5c8018977efa..ffb13ad35716 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1112,18 +1112,13 @@ static inline int queue_alignment_offset(struct request_queue *q) return q->limits.alignment_offset; } -static inline int queue_limit_alignment_offset(struct queue_limits *lim, sector_t offset) +static inline int queue_limit_alignment_offset(struct queue_limits *lim, sector_t sector) { unsigned int granularity = max(lim->physical_block_size, lim->io_min); + unsigned int alignment = (sector << 9) & (granularity - 1); - offset &= granularity - 1; - return (granularity + lim->alignment_offset - offset) & (granularity - 1); -} - -static inline int queue_sector_alignment_offset(struct request_queue *q, - sector_t sector) -{ - return queue_limit_alignment_offset(&q->limits, sector << 9); + return (granularity + lim->alignment_offset - alignment) + & (granularity - 1); } static inline int bdev_alignment_offset(struct block_device *bdev) @@ -1147,10 +1142,8 @@ static inline int queue_discard_alignment(struct request_queue *q) return q->limits.discard_alignment; } -static inline int queue_sector_discard_alignment(struct request_queue *q, - sector_t sector) +static inline int queue_limit_discard_alignment(struct queue_limits *lim, sector_t sector) { - struct queue_limits *lim = &q->limits; unsigned int alignment = (sector << 9) & (lim->discard_granularity - 1); return (lim->discard_granularity + lim->discard_alignment - alignment) |