Re: [PATCH RFC v2 14/20] x86: mm: skip pud setup when using generic compile-time folded pagetable

[H. Peter Anvin]

On July 22, 2026 1:22:04 PM PDT, Dave Hansen <dave.hansen@xxxxxxxxx> wrote:
>On 7/22/26 13:18, Yeoreum Yun wrote:
>> Sorry. But do you mean check with cpu_feature_enabled() not with
>> boot_cpu_has()?
>> IIRC, the boot_cpu_has() doesn't use the DISABLE_MASK_BIT_SET() but
>> uses REQUIRED_MASK_BIT_SET() and I don't expect it wouldn't make
>> an optimisation to constant check which is contrast to DISABLE_MASK_BIT_SET().
>
>Ahh, yes. I forgot about that nuance! Moving to cpu_feature_enabled()
>would be great!

It is supposed to. That's the point of the required mask.