btrfs: make btrfs_should_delete_dir_index() return a bool instead

There's no need to return errors and we currently return 1 in case the
index should be deleted and 0 otherwise, so change the return type from
int to bool as this is a boolean function and it's more clear this way.

Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

Author: fdmanana

fs/btrfs/delayed-inode.c

@@ -1734,17 +1734,16 @@ void btrfs_readdir_put_delayed_items(struct btrfs_inode *inode,
 	downgrade_write(&inode->vfs_inode.i_rwsem);
 }
 
-int btrfs_should_delete_dir_index(const struct list_head *del_list,
-				  u64 index)
+bool btrfs_should_delete_dir_index(const struct list_head *del_list, u64 index)
 {
 	struct btrfs_delayed_item *curr;
-	int ret = 0;
+	bool ret = false;
 
 	list_for_each_entry(curr, del_list, readdir_list) {
 		if (curr->index > index)
 			break;
 		if (curr->index == index) {
-			ret = 1;
+			ret = true;
 			break;
 		}
 	}

fs/btrfs/delayed-inode.h

@@ -150,8 +150,7 @@ bool btrfs_readdir_get_delayed_items(struct btrfs_inode *inode,
 void btrfs_readdir_put_delayed_items(struct btrfs_inode *inode,
 				     struct list_head *ins_list,
 				     struct list_head *del_list);
-int btrfs_should_delete_dir_index(const struct list_head *del_list,
-				  u64 index);
+bool btrfs_should_delete_dir_index(const struct list_head *del_list, u64 index);
 int btrfs_readdir_delayed_dir_index(struct dir_context *ctx,
 				    const struct list_head *ins_list);