Re: [PATCH v2 01/46] mm: Add folio_to_pfn()

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To: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: Re: [PATCH v2 01/46] mm: Add folio_to_pfn()
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Wed, 23 Jun 2021 08:49:55 +0100
Cc: akpm@xxxxxxxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
In-reply-to: <20210622121551.3398730-2-willy@infradead.org>
References: <20210622121551.3398730-1-willy@infradead.org> <20210622121551.3398730-2-willy@infradead.org>

On Tue, Jun 22, 2021 at 01:15:06PM +0100, Matthew Wilcox (Oracle) wrote:
> The pfn of a folio is the pfn of its head page.
> 
> Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>

Maybe add a kerneldoc comment stating that?

Follow-Ups:
- Re: [PATCH v2 01/46] mm: Add folio_to_pfn()
  - From: Matthew Wilcox

References:
- [PATCH v2 00/46] Folio-enabling the page cache
  - From: Matthew Wilcox (Oracle)
- [PATCH v2 01/46] mm: Add folio_to_pfn()
  - From: Matthew Wilcox (Oracle)

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