summaryrefslogtreecommitdiffstats
path: root/drivers/md
diff options
context:
space:
mode:
authorNeilBrown <neilb@suse.de>2010-10-28 17:30:21 +1100
committerNeilBrown <neilb@suse.de>2010-10-28 17:30:21 +1100
commit4b532c9b8c87eb8e51605c4d08dfb5139c758dc5 (patch)
tree14d4813285bb4aff8e1d7a58a2fdfadd14803a9f /drivers/md
parentd97a41dc9c44f5829b7af7aa69fda10fd82b6b4e (diff)
md: remove md_mutex locking.
lock_kernel calls were recently pushed down into open/release functions. md doesn't need that protection. Then the BKL calls were change to md_mutex. We don't need those either. So remove it all. Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/md.c7
1 files changed, 0 insertions, 7 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 64f97168cef..2399168b631 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -57,8 +57,6 @@
#define DEBUG 0
#define dprintk(x...) ((void)(DEBUG && printk(x)))
-static DEFINE_MUTEX(md_mutex);
-
#ifndef MODULE
static void autostart_arrays(int part);
#endif
@@ -5887,7 +5885,6 @@ static int md_open(struct block_device *bdev, fmode_t mode)
mddev_t *mddev = mddev_find(bdev->bd_dev);
int err;
- mutex_lock(&md_mutex);
if (mddev->gendisk != bdev->bd_disk) {
/* we are racing with mddev_put which is discarding this
* bd_disk.
@@ -5896,7 +5893,6 @@ static int md_open(struct block_device *bdev, fmode_t mode)
/* Wait until bdev->bd_disk is definitely gone */
flush_scheduled_work();
/* Then retry the open from the top */
- mutex_unlock(&md_mutex);
return -ERESTARTSYS;
}
BUG_ON(mddev != bdev->bd_disk->private_data);
@@ -5910,7 +5906,6 @@ static int md_open(struct block_device *bdev, fmode_t mode)
check_disk_size_change(mddev->gendisk, bdev);
out:
- mutex_unlock(&md_mutex);
return err;
}
@@ -5919,10 +5914,8 @@ static int md_release(struct gendisk *disk, fmode_t mode)
mddev_t *mddev = disk->private_data;
BUG_ON(!mddev);
- mutex_lock(&md_mutex);
atomic_dec(&mddev->openers);
mddev_put(mddev);
- mutex_unlock(&md_mutex);
return 0;
}