linux-kernel - Re: [PATCH 18/27] mtd: nand: update mtd_to

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Date:	Tue, 17 Nov 2015 09:26:16 +0100
From:	Boris Brezillon <boris.brezillon@...e-electrons.com>
To:	Brian Norris <computersforpeace@...il.com>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	linux-mtd@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org,
	Hartley Sweeten <hsweeten@...ionengravers.com>,
	Ryan Mallon <rmallon@...il.com>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <kernel@...gutronix.de>,
	Imre Kaloz <kaloz@...nwrt.org>,
	Krzysztof Halasa <khalasa@...p.pl>,
	Tony Lindgren <tony@...mide.com>, linux-omap@...r.kernel.org,
	Alexander Clouter <alex@...riz.org.uk>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Gregory CLEMENT <gregory.clement@...e-electrons.com>,
	Jason Cooper <jason@...edaemon.net>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Andrew Lunn <andrew@...n.ch>, Daniel Mack <daniel@...que.org>,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	Robert Jarzmik <robert.jarzmik@...e.fr>,
	Marek Vasut <marek.vasut@...il.com>,
	Steven Miao <realmz6@...il.com>,
	adi-buildroot-devel@...ts.sourceforge.net,
	Mikael Starvik <starvik@...s.com>,
	Jesper Nilsson <jesper.nilsson@...s.com>,
	linux-cris-kernel@...s.com, Josh Wu <josh.wu@...el.com>,
	Wan ZongShun <mcuos.com@...il.com>,
	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>,
	Maxim Levitsky <maximlevitsky@...il.com>,
	Kukjin Kim <kgene@...nel.org>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	linux-samsung-soc@...r.kernel.org,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Chen-Yu Tsai <wens@...e.org>, linux-sunxi@...glegroups.com,
	Stefan Agner <stefan@...er.ch>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	devel@...verdev.osuosl.org
Subject: Re: [PATCH 18/27] mtd: nand: update mtd_to_nand()

On Mon, 16 Nov 2015 19:03:53 -0800
Brian Norris <computersforpeace@...il.com> wrote:

> On Mon, Nov 16, 2015 at 02:37:51PM +0100, Boris Brezillon wrote:
> > Now that all drivers are using the mtd instance embedded in the nand_chip
> 
> Do you have a script that verifies this? I thought you did at some
> point, and it'd be nice to note it, so I can also use it to verify
> things once it gets applied.

No, didn't write that script, but it should probably look like the one
I used to remove the mtd field from driver private struct.

> 
> > struct we can safely update the mtd_to_nand_chip() implementation to use
> 
> Nit: s/mtd_to_nand_chip/mtd_to_nand/

Yep, I'll fix that.

> 
> > the container_of macro instead of returning the content of mtd->priv.
> > This will allow us to remove mtd->priv = chip assignments done in all
> > NAND controller drivers.
> > 
> > Signed-off-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
> > ---
> >  include/linux/mtd/nand.h | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
> > index 8ec071e..873646d 100644
> > --- a/include/linux/mtd/nand.h
> > +++ b/include/linux/mtd/nand.h
> > @@ -734,7 +734,7 @@ static inline struct device_node *nand_get_flash_node(struct nand_chip *chip)
> >  
> >  static inline struct nand_chip *mtd_to_nand(struct mtd_info *mtd)
> >  {
> > -	return mtd->priv;
> > +	return container_of(mtd, struct nand_chip, mtd);
> >  }
> >  
> >  static inline struct mtd_info *nand_to_mtd(struct nand_chip *chip)
> > -- 
> > 2.1.4
> > 



-- 
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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