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Commit 23ceb5b7 authored by Tao Ma's avatar Tao Ma Committed by Jens Axboe
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block: Remove extra discard_alignment from hd_struct. 



Currently, hd_struct.discard_alignment is only used when we
show /sys/block/sdx/sdx/discard_alignment. So remove it and
calculate when it is asked to show.

Signed-off-by: default avatarTao Ma <boyu.mt@taobao.com>
Signed-off-by: default avatarJens Axboe <jaxboe@fusionio.com>
parent 8af1954d

fs/partitions/check.c

+6 −3
Original line number Diff line number Diff line
@@ -255,7 +255,12 @@ ssize_t part_discard_alignment_show(struct device *dev, 
				   struct device_attribute *attr, char *buf)

{

	struct hd_struct *p = dev_to_part(dev);

	return sprintf(buf, "%u\n", p->discard_alignment);

	struct gendisk *disk = dev_to_disk(dev);



	return sprintf(buf, "%u\n",

		       (unsigned long long)queue_limit_discard_alignment(

							&disk->queue->limits,

							p->start_sect));

}



ssize_t part_stat_show(struct device *dev,
@@ -449,8 +454,6 @@ struct hd_struct *add_partition(struct gendisk *disk, int partno, 
	p->start_sect = start;

	p->alignment_offset =

		queue_limit_alignment_offset(&disk->queue->limits, start);

	p->discard_alignment =

		queue_limit_discard_alignment(&disk->queue->limits, start);

	p->nr_sects = len;

	p->partno = partno;

	p->policy = get_disk_ro(disk);

include/linux/genhd.h

+0 −1
Original line number Diff line number Diff line
@@ -100,7 +100,6 @@ struct hd_struct { 
	sector_t start_sect;

	sector_t nr_sects;

	sector_t alignment_offset;

	unsigned int discard_alignment;

	struct device __dev;

	struct kobject *holder_dir;

	int policy, partno;