Re: [PATCH] mm: use clear_user_(high)page() for arch with special user folio handling

[Matthew Wilcox]

On Fri, Dec 06, 2024 at 09:19:38AM -0500, Zi Yan wrote:
> For architectures setting ARCH_HAS_CPU_CACHE_ALIASING, which requires
> flushing cache and arc, which sets folio->flags after clearing a user
> folio

I think arc just has some legacy code left that needs to be ripped out.
See commit d5272aaa8257 which took away ARCH_HAS_CPU_CACHE_ALIASING
from arc.

Looking at 8690bbcf3b70, I wonder if you want to use
cpu_dcache_is_aliasing() here?