linux-kernel - Re: [PATCH v14 68/74] dax: Convert dax_lock

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Date:   Fri, 6 Jul 2018 06:04:07 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     Ross Zwisler <ross.zwisler@...ux.intel.com>, linux-mm@...ck.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jan Kara <jack@...e.cz>, Jeff Layton <jlayton@...hat.com>,
        Lukas Czerner <lczerner@...hat.com>,
        Christoph Hellwig <hch@....de>,
        Goldwyn Rodrigues <rgoldwyn@...e.com>,
        Nicholas Piggin <npiggin@...il.com>,
        Ryusuke Konishi <konishi.ryusuke@....ntt.co.jp>,
        linux-nilfs@...r.kernel.org, Jaegeuk Kim <jaegeuk@...nel.org>,
        Chao Yu <yuchao0@...wei.com>,
        linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [PATCH v14 68/74] dax: Convert dax_lock_page to XArray

On Fri, Jun 29, 2018 at 11:30:55AM -0600, Ross Zwisler wrote:
> On Sat, Jun 16, 2018 at 07:00:46PM -0700, Matthew Wilcox wrote:
> > Signed-off-by: Matthew Wilcox <willy@...radead.org>
> > ---
> <>
> > +static void *dax_make_page_entry(struct page *page, void *entry)
> > +{
> > +	pfn_t pfn = page_to_pfn_t(page);
> > +	return dax_make_entry(pfn, dax_is_pmd_entry(entry));
> > +}
> 
> This function is defined and never used, so we get:
> 
> fs/dax.c:106:14: warning: ‘dax_make_page_entry’ defined but not used [-Wunused-function]
>  static void *dax_make_page_entry(struct page *page, void *entry)
>   ^~~~~~~~~~~~~~~~~~~

Yeah, it was used in one of the functions Dan added, then removed.
I understand he's planning on bringing that back before 4.19 and I'm
going to rebase on top of that, so I've left it there for now.