Re: [PATCH RFC 05/11] mm: convert PTE table entries in ptep_get()

[Alexander Gordeev <agordeev@xxxxxxxxxxxxx>]

On Mon, Jul 27, 2026 at 05:46:56PM +0100, Muhammad Usama Anjum wrote:
> ptep_get() now accepts a pointer to hw_pte_t storage but must continue to
> return a logical pte_t value. Add __pte_from_hw() as the conversion hook
> and apply it in the generic ptep_get() implementation.
> 
> Signed-off-by: Muhammad Usama Anjum <usama.anjum@xxxxxxx>
> ---
>  include/linux/pgtable.h       | 2 +-
>  include/linux/pgtable_types.h | 1 +
>  2 files changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h
> index dad80d264aac2..3003ac9cd81fe 100644
> --- a/include/linux/pgtable.h
> +++ b/include/linux/pgtable.h
> @@ -493,7 +493,7 @@ static inline int pudp_set_access_flags(struct 
> vm_area_struct *vma,
>  #ifndef ptep_get
>  static inline pte_t ptep_get(hw_pte_t *ptep)
>  {
> -     return READ_ONCE(*ptep);
> +     return READ_ONCE(__pte_from_hw(*ptep));

Should it be something like?

        return __pte_from_hw(READ_ONCE(*ptep));

>  }
>  #endif
>  
> diff --git a/include/linux/pgtable_types.h b/include/linux/pgtable_types.h
> index ed5dba42a4f8c..61afe27307ec2 100644
> --- a/include/linux/pgtable_types.h
> +++ b/include/linux/pgtable_types.h
> @@ -6,6 +6,7 @@
>  
>  #ifndef __HAVE_ARCH_HW_PTE_T
>  #define hw_pte_t pte_t
> +#define __pte_from_hw(pte)   (pte)
>  #endif
>  
>  #endif /* _LINUX_PGTABLE_TYPES_H */
> -- 
> 2.47.3
>