[PATCH] platform/x86: ideapad-laptop: hide unused 'touchpad_store'

[PATCH] platform/x86: ideapad-laptop: hide unused 'touchpad_store'

[Arnd Bergmann]

A readonly sysfs property must not have a 'store' function:

drivers/platform/x86/ideapad-laptop.c:438:16: error: 'touchpad_store' defined but not used [-Werror=unused-function]

We can either comment it out or remove the function entirely,
without a good reason one or or another I picked the second option.

Fixes: 7f363145992c ("platform/x86: ideapad-laptop: Switch touchpad attribute to be RO")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/platform/x86/ideapad-laptop.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
index f7a4608cc60b..c4c7ae3179c0 100644
--- a/drivers/platform/x86/ideapad-laptop.c
+++ b/drivers/platform/x86/ideapad-laptop.c
@@ -435,6 +435,8 @@ static ssize_t touchpad_show(struct device *dev,
 	return sprintf(buf, "%lu\n", result);
 }
 
+#if 0
+/* Switch to RO for now: It might be revisited in the future */
 static ssize_t touchpad_store(struct device *dev,
 			      struct device_attribute *attr,
 			      const char *buf, size_t count)
@@ -453,7 +455,7 @@ static ssize_t touchpad_store(struct device *dev,
 	return count;
 }
 
-/* Switch to RO for now: It might be revisited in the future */
+#endif
 static DEVICE_ATTR_RO(touchpad);
 
 static struct attribute *ideapad_attributes[] = {
-- 
2.9.0

Re: [PATCH] platform/x86: ideapad-laptop: hide unused 'touchpad_store'

[Andy Shevchenko]

On Mon, May 22, 2017 at 4:07 PM, Arnd Bergmann <arnd@arndb.de> wrote:
> A readonly sysfs property must not have a 'store' function:
>
> drivers/platform/x86/ideapad-laptop.c:438:16: error: 'touchpad_store' defined but not used [-Werror=unused-function]
>
> We can either comment it out or remove the function entirely,
> without a good reason one or or another I picked the second option.

Hmm... I was expecting something like this but didn't get a single
error from kbuild bot.

>
> Fixes: 7f363145992c ("platform/x86: ideapad-laptop: Switch touchpad attribute to be RO")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  drivers/platform/x86/ideapad-laptop.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
> index f7a4608cc60b..c4c7ae3179c0 100644
> --- a/drivers/platform/x86/ideapad-laptop.c
> +++ b/drivers/platform/x86/ideapad-laptop.c
> @@ -435,6 +435,8 @@ static ssize_t touchpad_show(struct device *dev,
>         return sprintf(buf, "%lu\n", result);
>  }
>
> +#if 0
> +/* Switch to RO for now: It might be revisited in the future */

Can we use __maybe_unused instead?

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH] platform/x86: ideapad-laptop: hide unused 'touchpad_store'

[Arnd Bergmann]

On Mon, May 22, 2017 at 7:02 PM, Andy Shevchenko
<andy.shevchenko@gmail.com> wrote:
> On Mon, May 22, 2017 at 4:07 PM, Arnd Bergmann <arnd@arndb.de> wrote:
>> A readonly sysfs property must not have a 'store' function:
>>
>> drivers/platform/x86/ideapad-laptop.c:438:16: error: 'touchpad_store' defined but not used [-Werror=unused-function]
>>
>> We can either comment it out or remove the function entirely,
>> without a good reason one or or another I picked the second option.
>
> Hmm... I was expecting something like this but didn't get a single
> error from kbuild bot.
>
>>
>> Fixes: 7f363145992c ("platform/x86: ideapad-laptop: Switch touchpad attribute to be RO")
>> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
>> ---
>>  drivers/platform/x86/ideapad-laptop.c | 4 +++-
>>  1 file changed, 3 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
>> index f7a4608cc60b..c4c7ae3179c0 100644
>> --- a/drivers/platform/x86/ideapad-laptop.c
>> +++ b/drivers/platform/x86/ideapad-laptop.c
>> @@ -435,6 +435,8 @@ static ssize_t touchpad_show(struct device *dev,
>>         return sprintf(buf, "%lu\n", result);
>>  }
>>
>> +#if 0
>> +/* Switch to RO for now: It might be revisited in the future */
>
> Can we use __maybe_unused instead?

Sure, whichever you prefer. I guess you'll just commit that patch yourself then?

      Arnd

Re: [PATCH] platform/x86: ideapad-laptop: hide unused 'touchpad_store'

[Andy Shevchenko]

On Mon, May 22, 2017 at 11:36 PM, Arnd Bergmann <arnd@arndb.de> wrote:
> On Mon, May 22, 2017 at 7:02 PM, Andy Shevchenko
> <andy.shevchenko@gmail.com> wrote:
>> On Mon, May 22, 2017 at 4:07 PM, Arnd Bergmann <arnd@arndb.de> wrote:
>>> A readonly sysfs property must not have a 'store' function:
>>>
>>> drivers/platform/x86/ideapad-laptop.c:438:16: error: 'touchpad_store' defined but not used [-Werror=unused-function]
>>>
>>> We can either comment it out or remove the function entirely,
>>> without a good reason one or or another I picked the second option.
>>
>> Hmm... I was expecting something like this but didn't get a single
>> error from kbuild bot.
>>
>>>
>>> Fixes: 7f363145992c ("platform/x86: ideapad-laptop: Switch touchpad attribute to be RO")
>>> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
>>> ---
>>>  drivers/platform/x86/ideapad-laptop.c | 4 +++-
>>>  1 file changed, 3 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
>>> index f7a4608cc60b..c4c7ae3179c0 100644
>>> --- a/drivers/platform/x86/ideapad-laptop.c
>>> +++ b/drivers/platform/x86/ideapad-laptop.c
>>> @@ -435,6 +435,8 @@ static ssize_t touchpad_show(struct device *dev,
>>>         return sprintf(buf, "%lu\n", result);
>>>  }
>>>
>>> +#if 0
>>> +/* Switch to RO for now: It might be revisited in the future */
>>
>> Can we use __maybe_unused instead?
>
> Sure, whichever you prefer. I guess you'll just commit that patch yourself then?

Updated version pushed to testing, thanks.

-- 
With Best Regards,
Andy Shevchenko