openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

block: remove non-syncing __disk_block_events() and fold it into disk_block_events() 

After the previous update to disk_check_events(), nobody is using
non-syncing __disk_block_events().  Remove @sync and, as this makes
__disk_block_events() virtually identical to disk_block_events(),
remove the underscore prefixed version.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Tejun Heo 2011-06-09 20:43:55 +02:00 committed by Jens Axboe
parent a9dce2a3b4
commit c3af54afba
1 changed files with 24 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

55
block/genhd.c
View File

@ -1414,22 +1414,36 @@ static unsigned long disk_events_poll_jiffies(struct gendisk *disk)
return msecs_to_jiffies(intv_msecs);
}
static void __disk_block_events(struct gendisk *disk, bool sync)
/**
* disk_block_events - block and flush disk event checking
* @disk: disk to block events for
*
* On return from this function, it is guaranteed that event checking
* isn't in progress and won't happen until unblocked by
* disk_unblock_events(). Events blocking is counted and the actual
* unblocking happens after the matching number of unblocks are done.
*
* Note that this intentionally does not block event checking from
* disk_clear_events().
*
* CONTEXT:
* Might sleep.
*/
void disk_block_events(struct gendisk *disk)
{
struct disk_events *ev = disk->ev;
unsigned long flags;
bool cancel;
if (!ev)
return;
spin_lock_irqsave(&ev->lock, flags);
cancel = !ev->block++;
spin_unlock_irqrestore(&ev->lock, flags);
if (cancel) {
if (sync)
cancel_delayed_work_sync(&disk->ev->dwork);
else
cancel_delayed_work(&disk->ev->dwork);
}
if (cancel)
cancel_delayed_work_sync(&disk->ev->dwork);
}
static void __disk_unblock_events(struct gendisk *disk, bool check_now)
@ -1460,27 +1474,6 @@ static void __disk_unblock_events(struct gendisk *disk, bool check_now)
spin_unlock_irqrestore(&ev->lock, flags);
}
/**
* disk_block_events - block and flush disk event checking
* @disk: disk to block events for
*
* On return from this function, it is guaranteed that event checking
* isn't in progress and won't happen until unblocked by
* disk_unblock_events(). Events blocking is counted and the actual
* unblocking happens after the matching number of unblocks are done.
*
* Note that this intentionally does not block event checking from
* disk_clear_events().
*
* CONTEXT:
* Might sleep.
*/
void disk_block_events(struct gendisk *disk)
{
if (disk->ev)
__disk_block_events(disk, true);
}
/**
* disk_unblock_events - unblock disk event checking
* @disk: disk to unblock events for
@ -1554,7 +1547,7 @@ unsigned int disk_clear_events(struct gendisk *disk, unsigned int mask)
spin_unlock_irq(&ev->lock);
/* uncondtionally schedule event check and wait for it to finish */
__disk_block_events(disk, true);
disk_block_events(disk);
queue_delayed_work(system_nrt_wq, &ev->dwork, 0);
flush_delayed_work(&ev->dwork);
__disk_unblock_events(disk, false);
@ -1672,7 +1665,7 @@ static ssize_t disk_events_poll_msecs_store(struct device *dev,
if (intv < 0 && intv != -1)
return -EINVAL;
__disk_block_events(disk, true);
disk_block_events(disk);
disk->ev->poll_msecs = intv;
__disk_unblock_events(disk, true);
@ -1778,7 +1771,7 @@ static void disk_del_events(struct gendisk *disk)
if (!disk->ev)
return;
__disk_block_events(disk, true);
disk_block_events(disk);
mutex_lock(&disk_events_mutex);
list_del_init(&disk->ev->node);