[PATCH] mm/huge_memory: Initialise the tags of the huge zero folio

[David Hildenbrand (Red Hat)]

> 
> -----------8<---------------------------------------------
> diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
> index d816ff44faff..125dfa6c613b 100644
> --- a/arch/arm64/mm/fault.c
> +++ b/arch/arm64/mm/fault.c
> @@ -969,6 +969,16 @@ struct folio *vma_alloc_zeroed_movable_folio(struct vm_area_struct *vma,
>   
>   void tag_clear_highpage(struct page *page)
>   {
> +	/*
> +	 * Check if MTE is supported and fall back to clear_highpage().
> +	 * get_huge_zero_folio() unconditionally passes __GFP_ZEROTAGS and
> +	 * post_alloc_hook() will invoke tag_clear_highpage().
> +	 */
> +	if (!system_supports_mte()) {
> +		clear_highpage(page);
> +		return;
> +	}
> +

LGTM!

-- 
Cheers

David