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Diffstat (limited to 'fs/block_dev.c')
-rw-r--r--fs/block_dev.c114
1 files changed, 56 insertions, 58 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 37534573960b..045f98854f14 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -884,6 +884,61 @@ void bd_set_size(struct block_device *bdev, loff_t size)
}
EXPORT_SYMBOL(bd_set_size);
+static int __blkdev_put(struct block_device *bdev, unsigned int subclass)
+{
+ int ret = 0;
+ struct inode *bd_inode = bdev->bd_inode;
+ struct gendisk *disk = bdev->bd_disk;
+
+ mutex_lock_nested(&bdev->bd_mutex, subclass);
+ lock_kernel();
+ if (!--bdev->bd_openers) {
+ sync_blockdev(bdev);
+ kill_bdev(bdev);
+ }
+ if (bdev->bd_contains == bdev) {
+ if (disk->fops->release)
+ ret = disk->fops->release(bd_inode, NULL);
+ } else {
+ mutex_lock_nested(&bdev->bd_contains->bd_mutex,
+ subclass + 1);
+ bdev->bd_contains->bd_part_count--;
+ mutex_unlock(&bdev->bd_contains->bd_mutex);
+ }
+ if (!bdev->bd_openers) {
+ struct module *owner = disk->fops->owner;
+
+ put_disk(disk);
+ module_put(owner);
+
+ if (bdev->bd_contains != bdev) {
+ kobject_put(&bdev->bd_part->kobj);
+ bdev->bd_part = NULL;
+ }
+ bdev->bd_disk = NULL;
+ bdev->bd_inode->i_data.backing_dev_info = &default_backing_dev_info;
+ if (bdev != bdev->bd_contains)
+ __blkdev_put(bdev->bd_contains, subclass + 1);
+ bdev->bd_contains = NULL;
+ }
+ unlock_kernel();
+ mutex_unlock(&bdev->bd_mutex);
+ bdput(bdev);
+ return ret;
+}
+
+int blkdev_put(struct block_device *bdev)
+{
+ return __blkdev_put(bdev, BD_MUTEX_NORMAL);
+}
+EXPORT_SYMBOL(blkdev_put);
+
+int blkdev_put_partition(struct block_device *bdev)
+{
+ return __blkdev_put(bdev, BD_MUTEX_PARTITION);
+}
+EXPORT_SYMBOL(blkdev_put_partition);
+
static int
blkdev_get_whole(struct block_device *bdev, mode_t mode, unsigned flags);
@@ -980,7 +1035,7 @@ out_first:
bdev->bd_disk = NULL;
bdev->bd_inode->i_data.backing_dev_info = &default_backing_dev_info;
if (bdev != bdev->bd_contains)
- blkdev_put(bdev->bd_contains);
+ __blkdev_put(bdev->bd_contains, BD_MUTEX_WHOLE);
bdev->bd_contains = NULL;
put_disk(disk);
module_put(owner);
@@ -1079,63 +1134,6 @@ static int blkdev_open(struct inode * inode, struct file * filp)
return res;
}
-static int __blkdev_put(struct block_device *bdev, unsigned int subclass)
-{
- int ret = 0;
- struct inode *bd_inode = bdev->bd_inode;
- struct gendisk *disk = bdev->bd_disk;
-
- mutex_lock_nested(&bdev->bd_mutex, subclass);
- lock_kernel();
- if (!--bdev->bd_openers) {
- sync_blockdev(bdev);
- kill_bdev(bdev);
- }
- if (bdev->bd_contains == bdev) {
- if (disk->fops->release)
- ret = disk->fops->release(bd_inode, NULL);
- } else {
- mutex_lock_nested(&bdev->bd_contains->bd_mutex,
- subclass + 1);
- bdev->bd_contains->bd_part_count--;
- mutex_unlock(&bdev->bd_contains->bd_mutex);
- }
- if (!bdev->bd_openers) {
- struct module *owner = disk->fops->owner;
-
- put_disk(disk);
- module_put(owner);
-
- if (bdev->bd_contains != bdev) {
- kobject_put(&bdev->bd_part->kobj);
- bdev->bd_part = NULL;
- }
- bdev->bd_disk = NULL;
- bdev->bd_inode->i_data.backing_dev_info = &default_backing_dev_info;
- if (bdev != bdev->bd_contains)
- __blkdev_put(bdev->bd_contains, subclass + 1);
- bdev->bd_contains = NULL;
- }
- unlock_kernel();
- mutex_unlock(&bdev->bd_mutex);
- bdput(bdev);
- return ret;
-}
-
-int blkdev_put(struct block_device *bdev)
-{
- return __blkdev_put(bdev, BD_MUTEX_NORMAL);
-}
-
-EXPORT_SYMBOL(blkdev_put);
-
-int blkdev_put_partition(struct block_device *bdev)
-{
- return __blkdev_put(bdev, BD_MUTEX_PARTITION);
-}
-
-EXPORT_SYMBOL(blkdev_put_partition);
-
static int blkdev_close(struct inode * inode, struct file * filp)
{
struct block_device *bdev = I_BDEV(filp->f_mapping->host);