> +struct btrfs_data_container *init_data_container(s32 total_bytes)
> +{
> + struct btrfs_data_container *data;
> + unsigned long alloc_bytes;
> +
> + if (total_bytes < 0)
> + return ERR_PTR(-EINVAL);
> +
> + alloc_bytes = max((unsigned long)total_bytes, sizeof(*data));
The return type of sizeof() is unsigned int, so this will cause compile
warning.
We can use max_t() instead.
> + data = kmalloc(alloc_bytes, GFP_NOFS);
> + if (!data)
> + return ERR_PTR(-ENOMEM);
> +
> + data->size = total_bytes - sizeof(*data);
> + data->elem_cnt = 0;
> + data->elem_missed = 0;
> +
> + return data;
> +}
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