Re: m68k build regression

2013-04-08 Thread Linus Walleij
On Mon, Apr 8, 2013 at 6:32 AM, Greg Ungerer gregunge...@westnet.com.au wrote:

 Or we could fix like this, keeping the existing local functions
 intact for this one last kernel version.

 Regards
 Greg


 [PATCH] m68k: define a local gpio_request_one() function

 Compiling for linux-3.9-rc1 and later fails with:

 drivers/gpio/devres.c: In function 'devm_gpio_request_one':
 drivers/gpio/devres.c:90:2: error: implicit declaration of function 
 'gpio_request_one' [-Werror=implicit-function-declaration]

 So provide a local gpio_request_one() function. Code largely borrowed from
 blackfin's local gpio_request_one() function.

 Signed-off-by: Greg Ungerer g...@uclinux.org

Acked-by: Linus Walleij linus.wall...@linaro.org

Greg, are you pushing this patch then?

Yours,
Linus Walleij
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m68k build regression

2013-04-05 Thread Bityutskiy, Artem
Hi,

starting from 3.9-rc1 one of my m68k configurations does not build,
which is a regression. The configuration is attached. I build with
W=1. I did not look at the details, just shooting a bug report.

drivers/gpio/devres.c: In function 'devm_gpio_request_one':
drivers/gpio/devres.c:90:2: error: implicit declaration of function 
'gpio_request_one' [-Werror=implicit-function-declaration]
cc1: some warnings being treated as errors
make[3]: *** [drivers/gpio/devres.o] Error 1

Thanks!

-- 
Best Regards,
Artem Bityutskiy
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Intel Finland Oy
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Business Identity Code: 0357606 - 4 
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Re: m68k build regression

2013-04-05 Thread Linus Walleij
On Fri, Apr 5, 2013 at 12:39 PM, Bityutskiy, Artem
artem.bityuts...@intel.com wrote:

 starting from 3.9-rc1 one of my m68k configurations does not build,
 which is a regression. The configuration is attached. I build with
 W=1. I did not look at the details, just shooting a bug report.

 drivers/gpio/devres.c: In function 'devm_gpio_request_one':
 drivers/gpio/devres.c:90:2: error: implicit declaration of function 
 'gpio_request_one' [-Werror=implicit-function-declaration]
 cc1: some warnings being treated as errors
 make[3]: *** [drivers/gpio/devres.o] Error 1

Somehow GPIO_DEVRES get selected,
m68k is using GENERIC_GPIO but not GPIOLIB, so
devres.c include linux/gpio.h which includes asm/gpio.h
as the arch has CONFIG_ARCH_HAVE_CUSTOM_GPIO_H.

So to use the devres facility arch/m68k/include/asm/gpio.h
needs to provide gpio_request_one().

Which it doesn't and thus fails.

Did some driver you're using start to use
devm_gpio_request_one() recently?

I vaguely remember Alexandre looking into things like this
so adding him...

Yours,
Linus Walleij
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Re: m68k build regression

2013-04-05 Thread Alex Courbot

On 04/05/2013 07:49 AM, Linus Walleij wrote:

On Fri, Apr 5, 2013 at 12:39 PM, Bityutskiy, Artem
artem.bityuts...@intel.com wrote:


starting from 3.9-rc1 one of my m68k configurations does not build,
which is a regression. The configuration is attached. I build with
W=1. I did not look at the details, just shooting a bug report.

drivers/gpio/devres.c: In function 'devm_gpio_request_one':
drivers/gpio/devres.c:90:2: error: implicit declaration of function 
'gpio_request_one' [-Werror=implicit-function-declaration]
cc1: some warnings being treated as errors
make[3]: *** [drivers/gpio/devres.o] Error 1


Somehow GPIO_DEVRES get selected,
m68k is using GENERIC_GPIO but not GPIOLIB, so
devres.c include linux/gpio.h which includes asm/gpio.h
as the arch has CONFIG_ARCH_HAVE_CUSTOM_GPIO_H.

So to use the devres facility arch/m68k/include/asm/gpio.h
needs to provide gpio_request_one().

Which it doesn't and thus fails.

Did some driver you're using start to use
devm_gpio_request_one() recently?

I vaguely remember Alexandre looking into things like this
so adding him...


I know OpenRisc had an issue with devres.c (CC Jonas), please look at 
commit d4cb776f for the fix. I don't think my changes for 3.9 are 
responsible for this, they only deal with gpiolib's internals and not 
with header files, so they should be noop for platforms only using 
GENERIC_GPIO.


I'd recommend doing the same as OpenRisc (turning GENERIC_GPIO and 
ARCH_WANT_OPTIONAL_GPIOLIB into ARCH_REQUIRE_GPIOLIB), anyway 
GENERIC_GPIO is being removed for 3.10, so you better get used to using 
gpiolib from now on. :)


Alex.

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