We've made a helper function for reading root, so just apply it.
Signed-off-by: Liu Bo <liubo2...@cn.fujitsu.com>
---
fs/btrfs/ioctl.c | 13 +------------
1 files changed, 1 insertions(+), 12 deletions(-)
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index f9c2180..9b93fda 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -2844,7 +2844,6 @@ static long btrfs_ioctl_default_subvol(struct file *file,
void __user *argp)
struct btrfs_dir_item *di;
struct btrfs_trans_handle *trans;
struct btrfs_path *path;
- struct btrfs_key location;
struct btrfs_disk_key disk_key;
struct btrfs_super_block *disk_super;
u64 features;
@@ -2857,20 +2856,10 @@ static long btrfs_ioctl_default_subvol(struct file
*file, void __user *argp)
if (copy_from_user(&objectid, argp, sizeof(objectid)))
return -EFAULT;
- if (!objectid)
- objectid = root->root_key.objectid;
-
- location.objectid = objectid;
- location.type = BTRFS_ROOT_ITEM_KEY;
- location.offset = (u64)-1;
-
- new_root = btrfs_read_fs_root_no_name(root->fs_info, &location);
+ new_root = __btrfs_subvol_get_root(root, objectid);
if (IS_ERR(new_root))
return PTR_ERR(new_root);
- if (btrfs_root_refs(&new_root->root_item) == 0)
- return -ENOENT;
-
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
--
1.6.5.2
--
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