linux-kernel - Re: [PATCH v2] gpio: devm_gpio_* support should not depend on GPIOLIB

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Message-ID: <CAMo8BfKo=N_O=O0y74zy+orAn3nNb-OuS9fC92ebbN7bN_CQPg@mail.gmail.com>
Date:	Mon, 11 Feb 2013 19:50:25 +0300
From:	Max Filippov <jcmvbkbc@...il.com>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	Shawn Guo <shawn.guo@...aro.org>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] gpio: devm_gpio_* support should not depend on GPIOLIB

On Mon, Feb 11, 2013 at 6:13 PM, Linus Walleij <linus.walleij@...aro.org> wrote:
> On Sun, Feb 10, 2013 at 5:46 AM, Max Filippov <jcmvbkbc@...il.com> wrote:
>> On Sat, Jan 19, 2013 at 2:33 AM, Linus Walleij <linus.walleij@...aro.org> wrote:
>>> On Fri, Jan 18, 2013 at 8:57 AM, Shawn Guo <shawn.guo@...aro.org> wrote:
>>>
>>>> Some architectures (e.g. blackfin) provide gpio API without requiring
>>>> GPIOLIB support (ARCH_WANT_OPTIONAL_GPIOLIB).  devm_gpio_* functions
>>>> should also work for these architectures, since they do not really
>>>> depend on GPIOLIB.
>>>>
>>>> Add a new option GPIO_DEVRES (enabled by default) to control the build
>>>> of devres.c.  It also removes the empty version of devm_gpio_*
>>>> functions for !GENERIC_GPIO build from linux/gpio.h, and moves the
>>>> function declarations from asm-generic/gpio.h into linux/gpio.h.
>>>>
>>>> Signed-off-by: Shawn Guo <shawn.guo@...aro.org>
>>>
>>> OK I removed the old version of the patch and pushed this instead.
>>
>> Hi,
>>
>> this patch causes the following errors for xtensa defconfig build:
>
> Max, can you point us to an xtensa cross-compiler so we can
> figure out where the problem is?

Hi Linus,

I use the following scripts to build cross-compiler for xtensa:
https://github.com/jcmvbkbc/xtensa-toolchain-build

You'd need to download binutils/gcc/gdb source tarballs with versions
specified in config and then run

$ ./prepare.sh fsf && ./fixup-gdb.sh && ./build.sh fsf


FWIW I see that the issue is caused by building drivers/gpio/devres.c
with CONFIG_GPIOLIB=n. Should I just turn GPIO_DEVRES off too?

-- 
Thanks.
-- Max
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