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author | Arve Hjønnevåg <arve@android.com> | 2010-03-10 16:38:33 -0800 |
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committer | Arve Hjønnevåg <arve@android.com> | 2010-03-10 16:38:33 -0800 |
commit | 67078ecae3edb5b4657dcb9f67f744ecccd18a97 (patch) | |
tree | 90333318a7229fd977881577e0d19fd8e7e26423 /block | |
parent | dc136618cb23810dd3d4adfcb836b289cd528b4f (diff) | |
parent | 7f5e918e62cbc9ac27c2f47d3c3dd4b86f67ff0e (diff) |
Merge commit 'v2.6.32.9' into android-2.6.32
Diffstat (limited to 'block')
-rw-r--r-- | block/blk-settings.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c index 66d4aa8799b7..d5aa8865c644 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -560,6 +560,28 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b, EXPORT_SYMBOL(blk_stack_limits); /** + * bdev_stack_limits - adjust queue limits for stacked drivers + * @t: the stacking driver limits (top device) + * @bdev: the component block_device (bottom) + * @start: first data sector within component device + * + * Description: + * Merges queue limits for a top device and a block_device. Returns + * 0 if alignment didn't change. Returns -1 if adding the bottom + * device caused misalignment. + */ +int bdev_stack_limits(struct queue_limits *t, struct block_device *bdev, + sector_t start) +{ + struct request_queue *bq = bdev_get_queue(bdev); + + start += get_start_sect(bdev); + + return blk_stack_limits(t, &bq->limits, start << 9); +} +EXPORT_SYMBOL(bdev_stack_limits); + +/** * disk_stack_limits - adjust queue limits for stacked drivers * @disk: MD/DM gendisk (top) * @bdev: the underlying block device (bottom) |