Re: [PATCH mm-new 2/3] mm: clean up and expose is_guard_pte_marker()

[David Hildenbrand]

On 14.09.25 16:35, Lance Yang wrote:
> From: Lance Yang <lance.yang@xxxxxxxxx>
>
> is_guard_pte_marker() performs a redundant check because it calls both
> is_pte_marker() and is_guard_swp_entry(), both of which internally check
> for a PTE marker.
>
> is_guard_pte_marker()
>   |- is_pte_marker()
>   |   `- is_pte_marker_entry()  // First check
>   `- is_guard_swp_entry()
>       `- is_pte_marker_entry()  // Second, redundant check
>
> While a modern compiler could likely optimize this away, let's have clean
> code and not rely on it ;)
>
> Also, make it available for hugepage collapsing code.
>
> Cc: Kairui Song <kasong@xxxxxxxxxxx>
> Signed-off-by: Lance Yang <lance.yang@xxxxxxxxx>
> ---

Acked-by: David Hildenbrand <david@xxxxxxxxxx>

--
Cheers

David / dhildenb