Re: [PATCH v2 1/8] mm: swap: introduce pfn_swap_entry_to_folio()

[Matthew Wilcox <willy@xxxxxxxxxxxxx>]

On Thu, Jan 11, 2024 at 07:12:32PM +0800, Kefeng Wang wrote:
> Introduce a new pfn_swap_entry_to_folio(), it is similar to
> pfn_swap_entry_to_page(), but return a folio, which allow us
> to completely replace the struct page variables with struct
> folio variables.

I have the exact same patch in my tree except I called it
pfn_swap_entry_folio().  I also noted:

    Thanks to the compound_head() hidden inside PageLocked(), this saves a
    call to compound_head() over calling page_folio(pfn_swap_entry_to_page())

> Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>

Reviewed-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>