btrfs: Export btrfs_release_disk_super

Preparatory patch for removal of buffer_head usage in btrfs.

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

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 387f806..89be36a 100644 (file)
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1247,7 +1247,7 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
        return ret;
 }
 
-static void btrfs_release_disk_super(struct page *page)
+void btrfs_release_disk_super(struct page *page)
 {
        kunmap(page);
        put_page(page);

diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index f01552a..f197fac 100644 (file)
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -484,6 +484,7 @@ int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans,
 int btrfs_remove_chunk(struct btrfs_trans_handle *trans, u64 chunk_offset);
 struct extent_map *btrfs_get_chunk_map(struct btrfs_fs_info *fs_info,
                                       u64 logical, u64 length);
+void btrfs_release_disk_super(struct page *page);
 
 static inline void btrfs_dev_stat_inc(struct btrfs_device *dev,
                                      int index)