btrfs: change num_items type from u64 to unsigned int

The value of num_items that start_transaction() ultimately
always takes is a small one, so a 64 bit integer is overkill.

Also change num_items for btrfs_start_transaction() and
btrfs_start_transaction_lflush() as well.

Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: Alexandru Moise <00moses.alexander00@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h
index a994bb0..db6bfd9 100644
--- a/fs/btrfs/transaction.h
+++ b/fs/btrfs/transaction.h
@@ -185,9 +185,10 @@
 int btrfs_end_transaction(struct btrfs_trans_handle *trans,
 			  struct btrfs_root *root);
 struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
-						   int num_items);
+						   unsigned int num_items);
 struct btrfs_trans_handle *btrfs_start_transaction_lflush(
-					struct btrfs_root *root, int num_items);
+					struct btrfs_root *root,
+					unsigned int num_items);
 struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root);
 struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root);
 struct btrfs_trans_handle *btrfs_attach_transaction(struct btrfs_root *root);