Re: [PATCH] mm/migrate_device: Cleanup up PMD Checks and warnings

[Zi Yan]

On 14 Apr 2026, at 10:13, Sunny Patel wrote:

> Remove the odd VM_WARN_ON_FOLIO(!folio, folio) usage and replace it
> with a simpler VM_WARN_ON_ONCE(!folio) check.
>
> Drop the redundant VM_WARN_ON_ONCE(!pmd_none(*pmdp) &&
> !is_huge_zero_pmd(*pmdp)).
>
> Refactor the PMD checks to use pmd_present(), making the control flow
> clearer and avoiding duplicate condition checks.
>
> Signed-off-by: Sunny Patel <nueralspacetech@xxxxxxxxx>
> ---
>  mm/migrate_device.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>
Acked-by: Zi Yan <ziy@xxxxxxxxxx>

Best Regards,
Yan, Zi