Re: [PATCH v4 06/34] mm: Convert pmd_pgtable_page() to pmd_ptdesc()

On Mon, Jun 12, 2023 at 02:03:55PM -0700, Vishal Moola (Oracle) wrote:
> Converts pmd_pgtable_page() to pmd_ptdesc() and all its callers. This
> removes some direct accesses to struct page, working towards splitting
> out struct ptdesc from struct page.
> 
> Signed-off-by: Vishal Moola (Oracle) <[email protected]>

Acked-by: Mike Rapoport (IBM) <[email protected]>

> ---
>  include/linux/mm.h | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index f184f1eba85d..088b7664f897 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -2931,15 +2931,15 @@ static inline void pgtable_pte_page_dtor(struct page *page)
>  
>  #if USE_SPLIT_PMD_PTLOCKS
>  
> -static inline struct page *pmd_pgtable_page(pmd_t *pmd)
> +static inline struct ptdesc *pmd_ptdesc(pmd_t *pmd)
>  {
>  	unsigned long mask = ~(PTRS_PER_PMD * sizeof(pmd_t) - 1);
> -	return virt_to_page((void *)((unsigned long) pmd & mask));
> +	return virt_to_ptdesc((void *)((unsigned long) pmd & mask));
>  }
>  
>  static inline spinlock_t *pmd_lockptr(struct mm_struct *mm, pmd_t *pmd)
>  {
> -	return ptlock_ptr(pmd_pgtable_page(pmd));
> +	return ptlock_ptr(ptdesc_page(pmd_ptdesc(pmd)));
>  }
>  
>  static inline bool pmd_ptlock_init(struct page *page)
> @@ -2958,7 +2958,7 @@ static inline void pmd_ptlock_free(struct page *page)
>  	ptlock_free(page);
>  }
>  
> -#define pmd_huge_pte(mm, pmd) (pmd_pgtable_page(pmd)->pmd_huge_pte)
> +#define pmd_huge_pte(mm, pmd) (pmd_ptdesc(pmd)->pmd_huge_pte)
>  
>  #else
>  
> -- 
> 2.40.1
> 
> 

-- 
Sincerely yours,
Mike.