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Date:   Mon, 23 Jul 2018 11:41:07 +0200
From:   Boris Brezillon <boris.brezillon@bootlin.com>
To:     Arnd Bergmann <arnd@arndb.de>
Cc:     Randy Dunlap <rdunlap@infradead.org>,
        Anders Roxell <anders.roxell@linaro.org>,
        Miquel Raynal <miquel.raynal@bootlin.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Rob Herring <robh@kernel.org>,
        DTML <devicetree@vger.kernel.org>
Subject: Re: [PATCH] drivers/memory/Kconfig: Add CONFIG_OF dependency
Message-ID: <20180723114107.664164d2@bbrezillon>
In-Reply-To: <CAK8P3a1_8OSqyKsbw+m3ZzLWfPqDK4ynG3WoPTk+K2uJJsiq5A@mail.gmail.com>
References: <20180721200049.7553-1-anders.roxell@linaro.org>
        <a83ff193-be57-f566-cafb-132075025b56@infradead.org>
        <20180722082939.2de739f1@bbrezillon>
        <CAK8P3a1_8OSqyKsbw+m3ZzLWfPqDK4ynG3WoPTk+K2uJJsiq5A@mail.gmail.com>
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On Mon, 23 Jul 2018 11:34:43 +0200
Arnd Bergmann <arnd@arndb.de> wrote:

> On Sun, Jul 22, 2018 at 8:29 AM, Boris Brezillon
> <boris.brezillon@bootlin.com> wrote:
> > +Arnd, Rob and the DT ML.
> >
> > On Sat, 21 Jul 2018 14:53:47 -0700
> > Randy Dunlap <rdunlap@infradead.org> wrote:
> >  
> >> On 07/21/2018 01:00 PM, Anders Roxell wrote:  
> >> > JZ4780_NEMC doesn't depend on OF, and if OF isn't enabled we get this
> >> > error:
> >> > drivers/memory/jz4780-nemc.c: In function ‘jz4780_nemc_num_banks’:
> >> > drivers/memory/jz4780-nemc.c:72:10: error: implicit declaration of
> >> >  function ‘of_read_number’; did you mean ‘down_read_nested’?
> >> >  [-Werror=implicit-function-declaration]
> >> >    bank = of_read_number(prop, 1);
> >> >           ^~~~~~~~~~~~~~
> >> >           down_read_nested  
> >
> > Looks like of.h defines stubs so that people can compile-test without
> > CONFIG_OF selected. Maybe we should move of_read_number() and
> > of_read_ulong() out of the #ifdef CONFIG_OF section.  
> 
> That seems fine, though the added dependency seems appropriate
> here as well. of_read_number() is rarely used, and for the most part in
> powerpc specific code that is guaranteed to have CONFIG_OF enabled,
> so it's not that likely to cause many more problems.

Ok, then I'll let Miquel apply Anders' patch to the NAND tree.

Thanks for your feedback.

Boris