Re: [PATCH 4/5] fs/proc/page: use a folio in stable_page_flags()

[Matthew Wilcox]

On Fri, Nov 03, 2023 at 03:29:05PM +0800, Kefeng Wang wrote:
> Replace ten compound_head() calls with one page_folio().

This is going to conflict with Gregory Price's work:

https://lore.kernel.org/linux-mm/ZUCD1dsbrFjdZgVv@xxxxxxxxxxxx/

Perhaps the two of you can collaborate on a patch series?

>  	u |= kpf_copy_bit(k, KPF_SLAB,		PG_slab);
> -	if (PageTail(page) && PageSlab(page))
> +	if (PageTail(page) && folio_test_slab(folio))
>  		u |= 1 << KPF_SLAB;

This doesn't make sense ...