linux-kernel - Re: [PATCH] parisc: Export flush_cache

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Date:	Thu, 5 Sep 2013 20:07:19 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Kyle McMartin <kyle@...radead.org>
Cc:	James Bottomley <James.Bottomley@...senpartnership.com>,
	"James E.J. Bottomley" <jejb@...isc-linux.org>,
	Helge Deller <deller@....de>,
	Parisc List <linux-parisc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] parisc: Export flush_cache_page() (needed by lustre)

On Thu, Sep 5, 2013 at 7:13 PM, Kyle McMartin <kyle@...radead.org> wrote:
> On Thu, Sep 05, 2013 at 09:01:59AM -0700, James Bottomley wrote:
>> > +EXPORT_SYMBOL_GPL(flush_cache_page);
>>
>> This is an internal API: no architecture exports this.  Whoever is
>> trying to use it needs to use the correct API, so this is the wrong
>> patch.
>>
>
> I suspect it's copy_{to,from}_user_page being called here:

Indeed. Sorry, I should have mentioned that.

> drivers/staging/lustre/lustre/libcfs/linux/linux-curproc.c:
> copy_to_user_page(vma, page, addr,
>
> which we could probably take out of line.

If you want to hide flush_cache_page() for modules, yes.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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