Re: [PATCH v2 1/8] mm: introduce hw_pte_t for PTE table storage

[David Hildenbrand (Arm)]

On 9/3/26 12:29, Muhammad Usama Anjum wrote:
> pte_t is used both for software PTE values and for entries stored in a PTE
> table, so pte_t * does not distinguish a pointer to a software PTE
> value from a pointer to table storage.
> 
> Introduce hw_pte_t as the generic name for a PTE table element. Define it
> as a macro alias of pte_t by default. When an architecture selects
> ARCH_HAS_HW_PTE_T, define it as a structure containing a pte_t instead.
> This preserves the representation while allowing converted architectures
> to enforce the distinction at compile time.
> 
> Name the generic wrapper structure __hw_pte_t so architectures can
> forward-declare it when pgtable_t must be defined before the generic
> hw_pte_t typedef is visible. This avoids header-order dependencies.
> 
> Keep the C type definitions behind an __ASSEMBLY__ check because
> architecture assembly sources can include this header indirectly. Include
> asm/page.h so consumers such as linux/vmalloc.h retain the page definitions
> they previously obtained from that header.
> 
> Signed-off-by: Muhammad Usama Anjum <usama.anjum@xxxxxxx>
> ---

Acked-by: David Hildenbrand (Arm) <david@xxxxxxxxxx>

-- 
Cheers,

David