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block: Fix discard alignment calculation and printing

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Discard alignment reporting for partitions was incorrect.  Update to
match the algorithm used elsewhere.

The alignment can be negative (misaligned).  Fix format string
accordingly.

Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Martin K. Petersen 2010-01-11 03:21:48 -05:00 • committed by Jens Axboe
commit dd3d145d49
2 changed files with 6 additions and 3 deletions
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block/genhd.c
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@ -867,7 +867,7 @@ static ssize_t disk_discard_alignment_show(struct device *dev,
{
struct gendisk *disk = dev_to_disk(dev);
return sprintf(buf, "%u\n", queue_discard_alignment(disk->queue));
return sprintf(buf, "%d\n", queue_discard_alignment(disk->queue));
}
static DEVICE_ATTR(range, S_IRUGO, disk_range_show, NULL);