Btrfs: split out ioctl.c

Split the ioctl handling out of inode.c into a file of it's own.
Also fix up checkpatch.pl warnings for the moved code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 7ae4666..181c81d 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1553,6 +1553,10 @@
 			struct btrfs_root *root, struct btrfs_path *path,
 			u64 isize);
 /* inode.c */
+int btrfs_create_subvol_root(struct btrfs_root *new_root,
+		struct btrfs_trans_handle *trans, u64 new_dirid,
+		struct btrfs_block_group_cache *block_group);
+
 void btrfs_invalidate_dcache_root(struct btrfs_root *root, char *name,
 				  int namelen);
 
@@ -1585,7 +1589,6 @@
 int btrfs_init_cachep(void);
 void btrfs_destroy_cachep(void);
 long btrfs_ioctl_trans_end(struct file *file);
-long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
 				struct btrfs_root *root);
 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
@@ -1598,6 +1601,10 @@
 int btrfs_update_inode(struct btrfs_trans_handle *trans,
 			      struct btrfs_root *root,
 			      struct inode *inode);
+
+/* ioctl.c */
+long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
+
 /* file.c */
 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);