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authorTao Ma <boyu.mt@taobao.com>2011-05-06 19:30:02 -0600
committerJens Axboe <jaxboe@fusionio.com>2011-05-06 19:30:02 -0600
commit23ceb5b7719e9276d4fa72a3ecf94dd396755276 (patch)
treef0613021d10b9e8464a26a78fcabf48e0f0b715b
parent8af1954d172a46a63e5e79dae523a6d74715e458 (diff)
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: Tao Ma <boyu.mt@taobao.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
-rw-r--r--fs/partitions/check.c9
-rw-r--r--include/linux/genhd.h1
2 files changed, 6 insertions, 4 deletions
diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index d545e97d99c3..b7e16bccd5e5 100644
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -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);
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 300d7582006e..b78956b3c2e7 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -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;