btrfs: kill magical embedded struct superblock
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 9864cec..9552afc2 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1219,7 +1219,7 @@
* right now this just gets used so that a root has its own devid
* for stat. It may be used for more later
*/
- struct super_block anon_super;
+ dev_t anon_dev;
};
struct btrfs_ioctl_defrag_range_args {
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 1ac8db5d..b231ae1 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1077,12 +1077,7 @@
init_completion(&root->kobj_unregister);
root->defrag_running = 0;
root->root_key.objectid = objectid;
- root->anon_super.s_root = NULL;
- root->anon_super.s_dev = 0;
- INIT_LIST_HEAD(&root->anon_super.s_list);
- INIT_LIST_HEAD(&root->anon_super.s_instances);
- init_rwsem(&root->anon_super.s_umount);
-
+ root->anon_dev = 0;
return 0;
}
@@ -1311,7 +1306,7 @@
spin_lock_init(&root->cache_lock);
init_waitqueue_head(&root->cache_wait);
- ret = set_anon_super(&root->anon_super, NULL);
+ ret = get_anon_bdev(&root->anon_dev);
if (ret)
goto fail;
@@ -2393,10 +2388,8 @@
{
iput(root->cache_inode);
WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree));
- if (root->anon_super.s_dev) {
- down_write(&root->anon_super.s_umount);
- kill_anon_super(&root->anon_super);
- }
+ if (root->anon_dev)
+ free_anon_bdev(root->anon_dev);
free_extent_buffer(root->node);
free_extent_buffer(root->commit_root);
kfree(root->free_ino_ctl);
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index cb170ca..ecf0fac 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -6900,7 +6900,7 @@
{
struct inode *inode = dentry->d_inode;
generic_fillattr(inode, stat);
- stat->dev = BTRFS_I(inode)->root->anon_super.s_dev;
+ stat->dev = BTRFS_I(inode)->root->anon_dev;
stat->blksize = PAGE_CACHE_SIZE;
stat->blocks = (inode_get_bytes(inode) +
BTRFS_I(inode)->delalloc_bytes) >> 9;