btrfs: add struct declarations in dev-replace.h

dev-replace.h just has function prototypes for device replace, however
if you happen to include it in the wrong order you'll get compile errors
because of different structures not being defined.  Since these are just
pointer args to functions we can declare them at the top in order to
reduce the pain of using the header.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/dev-replace.h b/fs/btrfs/dev-replace.h
index 3911049a5f231b24e5aa65319568c4d238968e0e..6084b313056a75a9881c8e494c7c611c0673433f 100644 (file)
--- a/fs/btrfs/dev-replace.h
+++ b/fs/btrfs/dev-replace.h
@@ -7,6 +7,10 @@
 #define BTRFS_DEV_REPLACE_H
 
 struct btrfs_ioctl_dev_replace_args;
+struct btrfs_fs_info;
+struct btrfs_trans_handle;
+struct btrfs_dev_replace;
+struct btrfs_block_group;
 
 int btrfs_init_dev_replace(struct btrfs_fs_info *fs_info);
 int btrfs_run_dev_replace(struct btrfs_trans_handle *trans);