[PATCH 3/3] Btrfs: use helper function to simplify code
From: Liu Bo <hidden>
Date: 2012-06-29 09:55:27
Subsystem:
btrfs file system, filesystems (vfs and infrastructure), the rest · Maintainers:
Chris Mason, David Sterba, Alexander Viro, Christian Brauner, Linus Torvalds
We've made a helper function for reading root, so just apply it. Signed-off-by: Liu Bo <redacted> --- 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