btrfs: Remove inode argument from async_cow_submit

We already pass the async_cow struct that holds a reference to the
inode. Exploit this fact and remove the extra inode argument. No
functional changes.
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/inode.c

@@ -714,9 +714,9 @@ static void free_async_extent_pages(struct async_extent *async_extent)
  * queued.  We walk all the async extents created by compress_file_range
  * and send them down to the disk.
  */
-static noinline void submit_compressed_extents(struct inode *inode,
-					      struct async_cow *async_cow)
+static noinline void submit_compressed_extents(struct async_cow *async_cow)
 {
+	struct inode *inode = async_cow->inode;
 	struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
 	struct async_extent *async_extent;
 	u64 alloc_hint = 0;
@@ -1167,7 +1167,7 @@ static noinline void async_cow_submit(struct btrfs_work *work)
 		cond_wake_up_nomb(&fs_info->async_submit_wait);
 
 	if (async_cow->inode)
-		submit_compressed_extents(async_cow->inode, async_cow);
+		submit_compressed_extents(async_cow);
 }
 
 static noinline void async_cow_free(struct btrfs_work *work)