Re: [PATCH 2/6] mm: implement file_is_dev_zero() to uniquely identify /dev/zero

[David Hildenbrand (Arm)]

On 9/2/26 20:00, Lorenzo Stoakes (ARM) wrote:
> To lay the foundation for a future change that converts
> MAP_PRIVATE-/dev/zero mappings to be truly anonymous, add the ability to
> uniquely identify these mappings.
> 
> With the memory character device now part of mm/ this is trivially
> achievable through a file_is_dev_zero() predicate that simply tests that
> the file operation hooks are zero_fops.
> 
> Also update userland VMA tests to expose file_is_dev_zero() and provide
> a stub zero_fops for testing.
> 
> Signed-off-by: Lorenzo Stoakes (ARM) <ljs@xxxxxxxxxx>
> ---

yes!

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

-- 
Cheers,

David