blkfront: Remove obsolete info->users

This is just bd_openers, protected by the bd_mutex.

Signed-off-by: Daniel Stodden <daniel.stodden@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 9c5a25a462e61f7f1f3f958f6fd9bdbfb4c43a63..b01167b6207a046fed4f6606ace6a87dfc8c2f49 100644 (file)
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -96,12 +96,6 @@ struct blkfront_info
        unsigned long shadow_free;
        int feature_barrier;
        int is_ready;
-
-       /**
-        * The number of people holding this device open.  We won't allow a
-        * hot-unplug unless this is 0.
-        */
-       int users;
 };
 
 static DEFINE_SPINLOCK(blkif_io_lock);
@@ -977,7 +971,7 @@ blkfront_closing(struct blkfront_info *info)
 
        mutex_lock(&bdev->bd_mutex);
 
-       if (info->users) {
+       if (bdev->bd_openers) {
                xenbus_dev_error(xbdev, -EBUSY,
                                 "Device in use; refusing to close");
                xenbus_switch_state(xbdev, XenbusStateClosing);
@@ -1126,7 +1120,7 @@ static int blkfront_remove(struct xenbus_device *xbdev)
        mutex_lock(&bdev->bd_mutex);
        info = disk->private_data;
 
-       if (info && !info->users) {
+       if (info && !bdev->bd_openers) {
                xlvbd_release_gendisk(info);
                disk->private_data = NULL;
                kfree(info);