[PATCH v4 09/34] mm: Convert pmd_ptlock_init() to use ptdescs

[Mike Rapoport]

On Mon, Jun 12, 2023 at 02:03:58PM -0700, Vishal Moola (Oracle) wrote:
> This removes some direct accesses to struct page, working towards
> splitting out struct ptdesc from struct page.
> 
> Signed-off-by: Vishal Moola (Oracle) <vishal.moola at gmail.com>

Acked-by: Mike Rapoport (IBM) <rppt at kernel.org>

> ---
>  include/linux/mm.h | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index bb934d51390f..daecf1db6cf1 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -2942,12 +2942,12 @@ static inline spinlock_t *pmd_lockptr(struct mm_struct *mm, pmd_t *pmd)
>  	return ptlock_ptr(pmd_ptdesc(pmd));
>  }
>  
> -static inline bool pmd_ptlock_init(struct page *page)
> +static inline bool pmd_ptlock_init(struct ptdesc *ptdesc)
>  {
>  #ifdef CONFIG_TRANSPARENT_HUGEPAGE
> -	page->pmd_huge_pte = NULL;
> +	ptdesc->pmd_huge_pte = NULL;
>  #endif
> -	return ptlock_init(page);
> +	return ptlock_init(ptdesc_page(ptdesc));
>  }
>  
>  static inline void pmd_ptlock_free(struct page *page)
> @@ -2967,7 +2967,7 @@ static inline spinlock_t *pmd_lockptr(struct mm_struct *mm, pmd_t *pmd)
>  	return &mm->page_table_lock;
>  }
>  
> -static inline bool pmd_ptlock_init(struct page *page) { return true; }
> +static inline bool pmd_ptlock_init(struct ptdesc *ptdesc) { return true; }
>  static inline void pmd_ptlock_free(struct page *page) {}
>  
>  #define pmd_huge_pte(mm, pmd) ((mm)->pmd_huge_pte)
> @@ -2983,7 +2983,7 @@ static inline spinlock_t *pmd_lock(struct mm_struct *mm, pmd_t *pmd)
>  
>  static inline bool pgtable_pmd_page_ctor(struct page *page)
>  {
> -	if (!pmd_ptlock_init(page))
> +	if (!pmd_ptlock_init(page_ptdesc(page)))
>  		return false;
>  	__SetPageTable(page);
>  	inc_lruvec_page_state(page, NR_PAGETABLE);
> -- 
> 2.40.1
> 
> 

-- 
Sincerely yours,
Mike.