[PATCH RFC 1/2] pgtable: add pte_clrhuge() implementation for arm64 and riscv

[Matthew Wilcox]

On Thu, Oct 16, 2025 at 07:27:03PM +0800, Yin Tirui wrote:
> Add pte_clrhuge() helper function for architectures that enable
> ARCH_SUPPORTS_HUGE_PFNMAP to clear huge page attributes from PTE
> entries.

I really would prefer to see pte_clrhuge() removed first.  Otherwise
this just goes onto the long list of "somebody should clean this up some
day" and nobody ever will.