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Date: Wed, 7 Jun 2017 09:02:50 +0200
From: Boris Brezillon <boris.brezillon@free-electrons.com>
To: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: linux-mtd@lists.infradead.org, Enrico Jorns <ejo@pengutronix.de>, Artem
 Bityutskiy <artem.bityutskiy@linux.intel.com>, Dinh Nguyen
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 <computersforpeace@gmail.com>, Richard Weinberger <richard@nod.at>, Rob
 Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>
Subject: Re: [PATCH v4 04/23] mtd: nand: denali: avoid hard-coding ECC step,
 strength, bytes
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On Wed, 7 Jun 2017 12:09:31 +0900
Masahiro Yamada <yamada.masahiro@socionext.com> wrote:

> >> +
> >> +static int denali_ecc_setup(struct mtd_info *mtd, struct nand_chip *chip,
> >> +                         struct denali_nand_info *denali)
> >> +{
> >> +     struct nand_ecc_caps caps;
> >> +     int ret;
> >> +
> >> +     caps.stepinfos = denali->stepinfo;
> >> +     caps.nstepinfos = 1;
> >> +     caps.calc_ecc_bytes = denali_calc_ecc_bytes;
> >> +     caps.oob_reserve_bytes = denali->bbtskipbytes;  
> >
> > If you get rid of this oob_reserve_bytes field, you can define caps as
> > a static const and even directly store ecc_caps in denali_nand_info.  
> 
> To make caps static const, denali_calc_ecc_bytes must be exported
> to be referenced from denali_dt/denali_pci.
> I am reluctant to do it.

You already duplicate other information in denali_dt.c and
denali_pci.c, so what prevents you from duplicating this one-line
function?

Also, denali core already exports 2 functions, I don't see the problem
in exporting the common nand_ecc_caps object. Why are you reluctant to
that?