btrfs: use struct btrfs_inode inside btrfs_get_parent()

Use a struct btrfs_inode to btrfs_get_parent() as it's an internal
helper, allowing to remove some use of BTRFS_I.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/export.c b/fs/btrfs/export.c
index c087424ac0677e893ae6c0a6bbf33708dd570289..ab4d8625ad550292826fa36a4c6172579e116fb7 100644 (file)
--- a/fs/btrfs/export.c
+++ b/fs/btrfs/export.c
@@ -145,9 +145,9 @@ static struct dentry *btrfs_fh_to_dentry(struct super_block *sb, struct fid *fh,
 
 struct dentry *btrfs_get_parent(struct dentry *child)
 {
-       struct inode *dir = d_inode(child);
-       struct btrfs_fs_info *fs_info = btrfs_sb(dir->i_sb);
-       struct btrfs_root *root = BTRFS_I(dir)->root;
+       struct btrfs_inode *dir = BTRFS_I(d_inode(child));
+       struct btrfs_root *root = dir->root;
+       struct btrfs_fs_info *fs_info = root->fs_info;
        struct btrfs_path *path;
        struct extent_buffer *leaf;
        struct btrfs_root_ref *ref;
@@ -159,13 +159,13 @@ struct dentry *btrfs_get_parent(struct dentry *child)
        if (!path)
                return ERR_PTR(-ENOMEM);
 
-       if (btrfs_ino(BTRFS_I(dir)) == BTRFS_FIRST_FREE_OBJECTID) {
+       if (btrfs_ino(dir) == BTRFS_FIRST_FREE_OBJECTID) {
                key.objectid = btrfs_root_id(root);
                key.type = BTRFS_ROOT_BACKREF_KEY;
                key.offset = (u64)-1;
                root = fs_info->tree_root;
        } else {
-               key.objectid = btrfs_ino(BTRFS_I(dir));
+               key.objectid = btrfs_ino(dir);
                key.type = BTRFS_INODE_REF_KEY;
                key.offset = (u64)-1;
        }