linux-kernel - Re: [PATCH v2 35/46] mm/filemap: Add folio_mkwrite_check

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Message-ID: <YNM07q4bIw8Vii58@casper.infradead.org>
Date:   Wed, 23 Jun 2021 14:19:42 +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 35/46] mm/filemap: Add folio_mkwrite_check_truncate()

On Wed, Jun 23, 2021 at 11:47:58AM +0200, Christoph Hellwig wrote:
> On Tue, Jun 22, 2021 at 01:15:40PM +0100, Matthew Wilcox (Oracle) wrote:
> > This is the folio equivalent of page_mkwrite_check_truncate().
> > 
> > Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
> 
> Any reason that page_mkwrite_check_truncate isn't turned into a wrapper?

It'd introduce an extra call to page_folio() for no actual benefit