btrfs: add forward declarations and headers, part 3

Do a cleanup in the rest of the headers:

- add forward declarations for types referenced by pointers
- add includes when types need them

This fixes potential compilation problems if the headers are reordered
or the missing includes are not provided indirectly.

Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 19 insertions, 6 deletions

diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 53f87f398da7..21d4de0e3f1f 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -6,13 +6,28 @@
 #ifndef BTRFS_VOLUMES_H
 #define BTRFS_VOLUMES_H
 
+#include <linux/blk_types.h>
+#include <linux/sizes.h>
+#include <linux/atomic.h>
 #include <linux/sort.h>
-#include <linux/btrfs.h>
-#include "async-thread.h"
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/log2.h>
+#include <linux/kobject.h>
+#include <linux/refcount.h>
+#include <linux/completion.h>
+#include <linux/rbtree.h>
+#include <uapi/linux/btrfs.h>
 #include "messages.h"
-#include "tree-checker.h"
 #include "rcu-string.h"
 
+struct block_device;
+struct bdev_handle;
+struct btrfs_fs_info;
+struct btrfs_block_group;
+struct btrfs_trans_handle;
+struct btrfs_zoned_device_info;
+
 #define BTRFS_MAX_DATA_CHUNK_SIZE	(10ULL * SZ_1G)
 
 extern struct mutex uuid_mutex;
@@ -77,7 +92,7 @@ enum btrfs_raid_types {
 #define BTRFS_DEV_STATE_FLUSH_SENT	(4)
 #define BTRFS_DEV_STATE_NO_READA	(5)
 
-struct btrfs_zoned_device_info;
+struct btrfs_fs_devices;
 
 struct btrfs_device {
 	struct list_head dev_list; /* device_list_mutex */
@@ -557,8 +572,6 @@ static inline void btrfs_free_chunk_map(struct btrfs_chunk_map *map)
 	}
 }
 
-struct btrfs_balance_args;
-struct btrfs_balance_progress;
 struct btrfs_balance_control {
 	struct btrfs_balance_args data;
 	struct btrfs_balance_args meta;