Re: [PATCH 1/2] sparc: Fix handling of page table constructor failure

[Vlastimil Babka <vbabka@suse.cz>]

On 11/25/20 4:46 AM, Matthew Wilcox (Oracle) wrote:
> The page has just been allocated, so its refcount is 1.  free_unref_page()
> is for use on pages which have a zero refcount.  Use __free_page()
> like the other implementations of pte_alloc_one().
> 
> Fixes: 1ae9ae5f7df7 ("sparc: handle pgtable_page_ctor() fail")
> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>

Acked-by: Vlastimil Babka <vbabka@suse.cz>

> ---
>   arch/sparc/mm/init_64.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
> index 96edf64d4fb3..182bb7bdaa0a 100644
> --- a/arch/sparc/mm/init_64.c
> +++ b/arch/sparc/mm/init_64.c
> @@ -2894,7 +2894,7 @@ pgtable_t pte_alloc_one(struct mm_struct *mm)
>   	if (!page)
>   		return NULL;
>   	if (!pgtable_pte_page_ctor(page)) {
> -		free_unref_page(page);
> +		__free_page(page);
>   		return NULL;
>   	}
>   	return (pte_t *) page_address(page);
>