btrfs: make btrfs_dio_private::bytes u32

btrfs_dio_private::bytes is only assigned from bio::bi_iter::bi_size,
which is never larger than U32.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h
index d9bf53d..28e202e 100644 (file)
--- a/fs/btrfs/btrfs_inode.h
+++ b/fs/btrfs/btrfs_inode.h
@@ -325,7 +325,8 @@ struct btrfs_dio_private {
        struct inode *inode;
        u64 logical_offset;
        u64 disk_bytenr;
-       u64 bytes;
+       /* Used for bio::bi_size */
+       u32 bytes;
 
        /*
         * References to this structure. There is one reference per in-flight