linux-kernel - Re: [PATCH v2 31/46] mm/writeback: Add folio_clear_dirty_for

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Date:   Thu, 24 Jun 2021 21:09:22 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     akpm@...ux-foundation.org, linux-fsdevel@...r.kernel.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 31/46] mm/writeback: Add folio_clear_dirty_for_io()

On Wed, Jun 23, 2021 at 11:43:20AM +0200, Christoph Hellwig wrote:
> On Tue, Jun 22, 2021 at 01:15:36PM +0100, Matthew Wilcox (Oracle) wrote:
> > Transform clear_page_dirty_for_io() into folio_clear_dirty_for_io()
> > and add a compatibility wrapper.  Also move the declaration to pagemap.h
> > as this is page cache functionality that doesn't need to be used by the
> > rest of the kernel.
> > 
> > Increases the size of the kernel by 79 bytes.  While we remove a few
> > calls to compound_head(), we add a call to folio_nr_pages() to get the
> > stats correct.
> 
> ... for the eventual support of multi-page folios.

Added.