[PATCH v3 39/40] mm/huge_memory: remove vma_is_special_huge()

[Zi Yan]

On Thu Sep 17, 2026 at 12:22 PM EDT, Lorenzo Stoakes (ARM) wrote:
> vma_is_special_huge() tests whether either the VMA_PFNMAP_BIT or
> VMA_MIXEDMAP_BIT is set (i.e. whether the VMA is a kernel-owned mapping),
> but with a DAX carve-out.
>
> DAX however no longer sets VMA_MIXEDMAP_BIT, so this carve-out is no longer
> required.
>
> Therefore test for vma_is_kernel_owned() instead and also drop the
> VMA_IO_BIT check, as it is now redundant since it is enforced that only
> kernel-owned mappings can set this flag.
>
> This also eliminates another overloaded use of 'special' within mm.
>
> No functional change intended.
>
> Signed-off-by: Lorenzo Stoakes (ARM) <ljs at kernel.org>
> ---
>  mm/huge_memory.c | 18 ++++--------------
>  1 file changed, 4 insertions(+), 14 deletions(-)
>
Acked-by: Zi Yan <ziy at nvidia.com>


-- 
Best Regards,
Yan, Zi