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dm: remove unnecessary struct dm_wq_req 

Remove struct dm_wq_req and move "work" directly into struct mapped_device.

In the revised implementation, the thread will do just one type of work
(processing the queue).

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Mikulas Patocka 2009-04-02 19:55:37 +01:00 committed by Alasdair G Kergon
parent 9a1fb46448
commit 53d5914f28
1 changed files with 7 additions and 17 deletions
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24
drivers/md/dm.c
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@ -99,11 +99,6 @@ union map_info *dm_get_mapinfo(struct bio *bio)
/*
* Work processed by per-device workqueue.
*/
struct dm_wq_req {
struct work_struct work;
struct mapped_device *md;
};
struct mapped_device {
struct rw_semaphore io_lock;
struct mutex suspend_lock;
@ -125,6 +120,7 @@ struct mapped_device {
*/
atomic_t pending;
wait_queue_head_t wait;
struct work_struct work;
struct bio_list deferred;
struct bio_list pushback;
@ -1070,6 +1066,8 @@ out:
static struct block_device_operations dm_blk_dops;
static void dm_wq_work(struct work_struct *work);
/*
* Allocate and initialise a blank device with a given minor.
*/
@ -1136,6 +1134,7 @@ static struct mapped_device *alloc_dev(int minor)
atomic_set(&md->pending, 0);
init_waitqueue_head(&md->wait);
INIT_WORK(&md->work, dm_wq_work);
init_waitqueue_head(&md->eventq);
md->disk->major = _major;
@ -1426,26 +1425,17 @@ static void __merge_pushback_list(struct mapped_device *md)
static void dm_wq_work(struct work_struct *work)
{
struct dm_wq_req *req = container_of(work, struct dm_wq_req, work);
struct mapped_device *md = req->md;
struct mapped_device *md = container_of(work, struct mapped_device,
work);
down_write(&md->io_lock);
__flush_deferred_io(md);
up_write(&md->io_lock);
}
static void dm_wq_queue(struct mapped_device *md, struct dm_wq_req *req)
{
req->md = md;
INIT_WORK(&req->work, dm_wq_work);
queue_work(md->wq, &req->work);
}
static void dm_queue_flush(struct mapped_device *md)
{
struct dm_wq_req req;
dm_wq_queue(md, &req);
queue_work(md->wq, &md->work);
flush_workqueue(md->wq);
}