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Sender: Guenter Roeck <groeck7@gmail.com>
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Date:   Sat, 29 Oct 2022 16:02:56 -0700
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To:     Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc:     Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        linux-input@vger.kernel.org, linux-kernel@vger.kernel.org
References: <20220923184632.2157-1-andriy.shevchenko@linux.intel.com>
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From:   Guenter Roeck <linux@roeck-us.net>
Subject: Re: [PATCH v1 2/2] Input: matrix_keypad - replace header inclusions
 by forward declarations
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On 10/29/22 15:28, Dmitry Torokhov wrote:
> On Sat, Oct 29, 2022 at 07:25:51AM -0700, Guenter Roeck wrote:
>> On Fri, Sep 23, 2022 at 09:46:32PM +0300, Andy Shevchenko wrote:
>>> When the data structure is only referred by pointer, compiler may not need
>>> to see the contents of the data type. Thus, we may replace header inclusions
>>> by respective forward declarations.
>>>
>>> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
>>> ---
>>>   include/linux/input/matrix_keypad.h | 5 +++--
>>>   1 file changed, 3 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/include/linux/input/matrix_keypad.h b/include/linux/input/matrix_keypad.h
>>> index 9476768c3b90..b8d8d69eba29 100644
>>> --- a/include/linux/input/matrix_keypad.h
>>> +++ b/include/linux/input/matrix_keypad.h
>>> @@ -3,8 +3,9 @@
>>>   #define _MATRIX_KEYPAD_H
>>>   
>>>   #include <linux/types.h>
>>> -#include <linux/input.h>
>>
>> Possibly, but may other drivers rely on those includes.
>> This results in widespread build failures such as
>>
>> Building arm:allmodconfig ... failed
>> --------------
>> Error log:
>> In file included from include/linux/input/samsung-keypad.h:12,
>>                   from arch/arm/mach-s3c/keypad.h:12,
>>                   from arch/arm/mach-s3c/mach-crag6410.c:57:
>> arch/arm/mach-s3c/mach-crag6410.c:183:19: error: 'KEY_VOLUMEUP' undeclared here
> 
> I fixed this particular instance, hopefully it is one of the very
> last of them...
> 

Sorry, I didn't bother listing all of them. There is at least one more.

Error log:
arch/arm/mach-pxa/spitz.c:410:11: error: 'EV_PWR' undeclared here (not in a function)
   410 |   .type = EV_PWR,
       |           ^~~~~~

with arm:pxa_defconfig.

Guenter