mainline build failure due to ace6d1448138 ("mfd: cs42l43: Add support for cs42l43 core driver")

mainline build failure due to ace6d1448138 ("mfd: cs42l43: Add support for cs42l43 core driver")

[Sudip Mukherjee (Codethink)]

Hi All,

The latest mainline kernel branch fails to build alpha, csky and s390
allmodconfig with the error:

drivers/mfd/cs42l43.c:1138:12: error: 'cs42l43_runtime_resume' defined but not used [-Werror=unused-function]
 1138 | static int cs42l43_runtime_resume(struct device *dev)
      |            ^~~~~~~~~~~~~~~~~~~~~~
drivers/mfd/cs42l43.c:1124:12: error: 'cs42l43_runtime_suspend' defined but not used [-Werror=unused-function]
 1124 | static int cs42l43_runtime_suspend(struct device *dev)
      |            ^~~~~~~~~~~~~~~~~~~~~~~
drivers/mfd/cs42l43.c:1106:12: error: 'cs42l43_resume' defined but not used [-Werror=unused-function]
 1106 | static int cs42l43_resume(struct device *dev)
      |            ^~~~~~~~~~~~~~
drivers/mfd/cs42l43.c:1076:12: error: 'cs42l43_suspend' defined but not used [-Werror=unused-function]
 1076 | static int cs42l43_suspend(struct device *dev)
      |            ^~~~~~~~~~~~~~~

git bisect pointed to ace6d1448138 ("mfd: cs42l43: Add support for cs42l43 core driver")

I will be happy to test any patch or provide any extra log if needed.


-- 
Regards
Sudip

Re: mainline build failure due to ace6d1448138 ("mfd: cs42l43: Add support for cs42l43 core driver")

[Takashi Iwai]

On Wed, 30 Aug 2023 13:29:57 +0200,
Sudip Mukherjee (Codethink) wrote:
> 
> Hi All,
> 
> The latest mainline kernel branch fails to build alpha, csky and s390
> allmodconfig with the error:
> 
> drivers/mfd/cs42l43.c:1138:12: error: 'cs42l43_runtime_resume' defined but not used [-Werror=unused-function]
>  1138 | static int cs42l43_runtime_resume(struct device *dev)
>       |            ^~~~~~~~~~~~~~~~~~~~~~
> drivers/mfd/cs42l43.c:1124:12: error: 'cs42l43_runtime_suspend' defined but not used [-Werror=unused-function]
>  1124 | static int cs42l43_runtime_suspend(struct device *dev)
>       |            ^~~~~~~~~~~~~~~~~~~~~~~
> drivers/mfd/cs42l43.c:1106:12: error: 'cs42l43_resume' defined but not used [-Werror=unused-function]
>  1106 | static int cs42l43_resume(struct device *dev)
>       |            ^~~~~~~~~~~~~~
> drivers/mfd/cs42l43.c:1076:12: error: 'cs42l43_suspend' defined but not used [-Werror=unused-function]
>  1076 | static int cs42l43_suspend(struct device *dev)
>       |            ^~~~~~~~~~~~~~~
> 
> git bisect pointed to ace6d1448138 ("mfd: cs42l43: Add support for cs42l43 core driver")
> 
> I will be happy to test any patch or provide any extra log if needed.

Adding __maybe_unused for those PM functions should work around it,
something like below.  Could you check it?
If it's confirmed to work, I'll submit properly.


thanks,

Takashi

-- 8< --
From: Takashi Iwai <tiwai@suse.de>
Subject: [PATCH] mfd: cs42l43: Fix unused function errors for PM callbacks

Add __maybe_unused prefix for suppressing the build errors due to
defined-but-not-used PM callbacks.

Reported-by: Sudip Mukherjee (Codethink) <sudipm.mukherjee@gmail.com>
Fixes: ace6d1448138 ("mfd: cs42l43: Add support for cs42l43 core driver")
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 drivers/mfd/cs42l43.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/mfd/cs42l43.c b/drivers/mfd/cs42l43.c
index 37b23e9bae82..e94b73e6869a 100644
--- a/drivers/mfd/cs42l43.c
+++ b/drivers/mfd/cs42l43.c
@@ -1073,7 +1073,7 @@ void cs42l43_dev_remove(struct cs42l43 *cs42l43)
 }
 EXPORT_SYMBOL_NS_GPL(cs42l43_dev_remove, MFD_CS42L43);
 
-static int cs42l43_suspend(struct device *dev)
+static int __maybe_unused cs42l43_suspend(struct device *dev)
 {
 	struct cs42l43 *cs42l43 = dev_get_drvdata(dev);
 	int ret;
@@ -1103,7 +1103,7 @@ static int cs42l43_suspend(struct device *dev)
 	return 0;
 }
 
-static int cs42l43_resume(struct device *dev)
+static int __maybe_unused cs42l43_resume(struct device *dev)
 {
 	struct cs42l43 *cs42l43 = dev_get_drvdata(dev);
 	int ret;
@@ -1121,7 +1121,7 @@ static int cs42l43_resume(struct device *dev)
 	return 0;
 }
 
-static int cs42l43_runtime_suspend(struct device *dev)
+static int __maybe_unused cs42l43_runtime_suspend(struct device *dev)
 {
 	struct cs42l43 *cs42l43 = dev_get_drvdata(dev);
 
@@ -1135,7 +1135,7 @@ static int cs42l43_runtime_suspend(struct device *dev)
 	return 0;
 }
 
-static int cs42l43_runtime_resume(struct device *dev)
+static int __maybe_unused cs42l43_runtime_resume(struct device *dev)
 {
 	struct cs42l43 *cs42l43 = dev_get_drvdata(dev);
 	unsigned int reset_canary;
-- 
2.35.3

Re: mainline build failure due to ace6d1448138 ("mfd: cs42l43: Add support for cs42l43 core driver")

[Linux regression tracking (Thorsten Leemhuis)]

On 30.08.23 13:29, Sudip Mukherjee (Codethink) wrote:
> 
> The latest mainline kernel branch fails to build alpha, csky and s390
> allmodconfig with the error:

Thx for the report and involving regzbot.

FWIW, 0day bot noticed this earlier and Charles Keepax (now CCed) afaics
even submitted a fix a bit more than a week ago, but that didn't get any
further it seems:
https://lore.kernel.org/all/202308212225.fGjY1rr6-lkp@intel.com/
https://lore.kernel.org/all/20230822114914.340359-1-ckeepax@opensource.cirrus.com/

Ciao, Thorsten

> drivers/mfd/cs42l43.c:1138:12: error: 'cs42l43_runtime_resume' defined but not used [-Werror=unused-function]
>  1138 | static int cs42l43_runtime_resume(struct device *dev)
>       |            ^~~~~~~~~~~~~~~~~~~~~~
> drivers/mfd/cs42l43.c:1124:12: error: 'cs42l43_runtime_suspend' defined but not used [-Werror=unused-function]
>  1124 | static int cs42l43_runtime_suspend(struct device *dev)
>       |            ^~~~~~~~~~~~~~~~~~~~~~~
> drivers/mfd/cs42l43.c:1106:12: error: 'cs42l43_resume' defined but not used [-Werror=unused-function]
>  1106 | static int cs42l43_resume(struct device *dev)
>       |            ^~~~~~~~~~~~~~
> drivers/mfd/cs42l43.c:1076:12: error: 'cs42l43_suspend' defined but not used [-Werror=unused-function]
>  1076 | static int cs42l43_suspend(struct device *dev)
>       |            ^~~~~~~~~~~~~~~
> 
> git bisect pointed to ace6d1448138 ("mfd: cs42l43: Add support for cs42l43 core driver")
> 
> I will be happy to test any patch or provide any extra log if needed.

P.S.:

#regzbot monitor:
https://lore.kernel.org/all/20230822114914.340359-1-ckeepax@opensource.cirrus.com/
#regzbot monitor:
https://lore.kernel.org/all/202308212225.fGjY1rr6-lkp@intel.com/
#regzbot fix: mfd: cs42l43: Use correct macro for new-style PM runtime ops

Re: mainline build failure due to ace6d1448138 ("mfd: cs42l43: Add support for cs42l43 core driver")

[Charles Keepax]

On Wed, Aug 30, 2023 at 03:09:13PM +0200, Takashi Iwai wrote:
> On Wed, 30 Aug 2023 13:29:57 +0200,
> Sudip Mukherjee (Codethink) wrote:
> > 
> > Hi All,
> > 
> > The latest mainline kernel branch fails to build alpha, csky and s390
> > allmodconfig with the error:
> > 
> > drivers/mfd/cs42l43.c:1138:12: error: 'cs42l43_runtime_resume' defined but not used [-Werror=unused-function]
> >  1138 | static int cs42l43_runtime_resume(struct device *dev)
> >       |            ^~~~~~~~~~~~~~~~~~~~~~
> > drivers/mfd/cs42l43.c:1124:12: error: 'cs42l43_runtime_suspend' defined but not used [-Werror=unused-function]
> >  1124 | static int cs42l43_runtime_suspend(struct device *dev)
> >       |            ^~~~~~~~~~~~~~~~~~~~~~~
> > drivers/mfd/cs42l43.c:1106:12: error: 'cs42l43_resume' defined but not used [-Werror=unused-function]
> >  1106 | static int cs42l43_resume(struct device *dev)
> >       |            ^~~~~~~~~~~~~~
> > drivers/mfd/cs42l43.c:1076:12: error: 'cs42l43_suspend' defined but not used [-Werror=unused-function]
> >  1076 | static int cs42l43_suspend(struct device *dev)
> >       |            ^~~~~~~~~~~~~~~
> > 
> > git bisect pointed to ace6d1448138 ("mfd: cs42l43: Add support for cs42l43 core driver")
> > 
> > I will be happy to test any patch or provide any extra log if needed.
> 
> Adding __maybe_unused for those PM functions should work around it,
> something like below.  Could you check it?
> If it's confirmed to work, I'll submit properly.
> 
> 

This is probably the correct fix:

https://lore.kernel.org/lkml/20230822114914.340359-1-ckeepax@opensource.cirrus.com/

Just waiting on it to be reviewed.

Thanks,
Charles

Re: mainline build failure due to ace6d1448138 ("mfd: cs42l43: Add support for cs42l43 core driver")

[Takashi Iwai]

On Wed, 30 Aug 2023 17:00:37 +0200,
Charles Keepax wrote:
> 
> On Wed, Aug 30, 2023 at 03:09:13PM +0200, Takashi Iwai wrote:
> > On Wed, 30 Aug 2023 13:29:57 +0200,
> > Sudip Mukherjee (Codethink) wrote:
> > > 
> > > Hi All,
> > > 
> > > The latest mainline kernel branch fails to build alpha, csky and s390
> > > allmodconfig with the error:
> > > 
> > > drivers/mfd/cs42l43.c:1138:12: error: 'cs42l43_runtime_resume' defined but not used [-Werror=unused-function]
> > >  1138 | static int cs42l43_runtime_resume(struct device *dev)
> > >       |            ^~~~~~~~~~~~~~~~~~~~~~
> > > drivers/mfd/cs42l43.c:1124:12: error: 'cs42l43_runtime_suspend' defined but not used [-Werror=unused-function]
> > >  1124 | static int cs42l43_runtime_suspend(struct device *dev)
> > >       |            ^~~~~~~~~~~~~~~~~~~~~~~
> > > drivers/mfd/cs42l43.c:1106:12: error: 'cs42l43_resume' defined but not used [-Werror=unused-function]
> > >  1106 | static int cs42l43_resume(struct device *dev)
> > >       |            ^~~~~~~~~~~~~~
> > > drivers/mfd/cs42l43.c:1076:12: error: 'cs42l43_suspend' defined but not used [-Werror=unused-function]
> > >  1076 | static int cs42l43_suspend(struct device *dev)
> > >       |            ^~~~~~~~~~~~~~~
> > > 
> > > git bisect pointed to ace6d1448138 ("mfd: cs42l43: Add support for cs42l43 core driver")
> > > 
> > > I will be happy to test any patch or provide any extra log if needed.
> > 
> > Adding __maybe_unused for those PM functions should work around it,
> > something like below.  Could you check it?
> > If it's confirmed to work, I'll submit properly.
> > 
> > 
> 
> This is probably the correct fix:
> 
> https://lore.kernel.org/lkml/20230822114914.340359-1-ckeepax@opensource.cirrus.com/
> 
> Just waiting on it to be reviewed.

Thanks, that looks better.  Let's wait for the patch acceptance.


Takashi

Re: mainline build failure due to ace6d1448138 ("mfd: cs42l43: Add support for cs42l43 core driver")

[Sudip Mukherjee]

Hi All,

On Wed, 30 Aug 2023 at 12:29, Sudip Mukherjee (Codethink)
<sudipm.mukherjee@gmail.com> wrote:
>
> Hi All,
>
> The latest mainline kernel branch fails to build alpha, csky and s390
> allmodconfig with the error:
>
> drivers/mfd/cs42l43.c:1138:12: error: 'cs42l43_runtime_resume' defined but not used [-Werror=unused-function]
>  1138 | static int cs42l43_runtime_resume(struct device *dev)
>       |            ^~~~~~~~~~~~~~~~~~~~~~
> drivers/mfd/cs42l43.c:1124:12: error: 'cs42l43_runtime_suspend' defined but not used [-Werror=unused-function]
>  1124 | static int cs42l43_runtime_suspend(struct device *dev)
>       |            ^~~~~~~~~~~~~~~~~~~~~~~
> drivers/mfd/cs42l43.c:1106:12: error: 'cs42l43_resume' defined but not used [-Werror=unused-function]
>  1106 | static int cs42l43_resume(struct device *dev)
>       |            ^~~~~~~~~~~~~~
> drivers/mfd/cs42l43.c:1076:12: error: 'cs42l43_suspend' defined but not used [-Werror=unused-function]
>  1076 | static int cs42l43_suspend(struct device *dev)
>       |            ^~~~~~~~~~~~~~~
>
> git bisect pointed to ace6d1448138 ("mfd: cs42l43: Add support for cs42l43 core driver")

Since its almost time for v6.6-rc3, so just a quick reminder that this
build failure is still not fixed.


-- 
Regards
Sudip

Re: mainline build failure due to ace6d1448138 ("mfd: cs42l43: Add support for cs42l43 core driver")

[Thorsten Leemhuis]

On 23.09.23 17:02, Sudip Mukherjee wrote:
> On Wed, 30 Aug 2023 at 12:29, Sudip Mukherjee (Codethink)
> <sudipm.mukherjee@gmail.com> wrote:
>>
>> Hi All,
>>
>> The latest mainline kernel branch fails to build alpha, csky and s390
>> allmodconfig with the error:
>>
>> drivers/mfd/cs42l43.c:1138:12: error: 'cs42l43_runtime_resume' defined but not used [-Werror=unused-function]
>>  1138 | static int cs42l43_runtime_resume(struct device *dev)
>>       |            ^~~~~~~~~~~~~~~~~~~~~~
>> drivers/mfd/cs42l43.c:1124:12: error: 'cs42l43_runtime_suspend' defined but not used [-Werror=unused-function]
>>  1124 | static int cs42l43_runtime_suspend(struct device *dev)
>>       |            ^~~~~~~~~~~~~~~~~~~~~~~
>> drivers/mfd/cs42l43.c:1106:12: error: 'cs42l43_resume' defined but not used [-Werror=unused-function]
>>  1106 | static int cs42l43_resume(struct device *dev)
>>       |            ^~~~~~~~~~~~~~
>> drivers/mfd/cs42l43.c:1076:12: error: 'cs42l43_suspend' defined but not used [-Werror=unused-function]
>>  1076 | static int cs42l43_suspend(struct device *dev)
>>       |            ^~~~~~~~~~~~~~~
>>
>> git bisect pointed to ace6d1448138 ("mfd: cs42l43: Add support for cs42l43 core driver")
> 
> Since its almost time for v6.6-rc3, so just a quick reminder that this
> build failure is still not fixed.

Are you sure? I had expected eb72d5207008db ("mfd: cs42l43: Use correct
macro for new-style PM runtime ops")[1] that was merged this week would
have fixed this. Or am I mixing different problems up here?

Ciao, Thorsten

[1]
https://lore.kernel.org/all/20230919110320.1388527-1-u.kleine-koenig@pengutronix.de/

Re: mainline build failure due to ace6d1448138 ("mfd: cs42l43: Add support for cs42l43 core driver")

[Thorsten Leemhuis]

On 24.09.23 09:58, Thorsten Leemhuis wrote:
> On 23.09.23 17:02, Sudip Mukherjee wrote:
>> On Wed, 30 Aug 2023 at 12:29, Sudip Mukherjee (Codethink)
>> <sudipm.mukherjee@gmail.com> wrote:
>>>
>>> The latest mainline kernel branch fails to build alpha, csky and s390
>>> allmodconfig with the error:
>>>
>>> drivers/mfd/cs42l43.c:1138:12: error: 'cs42l43_runtime_resume' defined but not used [-Werror=unused-function]
>>>  1138 | static int cs42l43_runtime_resume(struct device *dev)
>>>       |            ^~~~~~~~~~~~~~~~~~~~~~
>>> drivers/mfd/cs42l43.c:1124:12: error: 'cs42l43_runtime_suspend' defined but not used [-Werror=unused-function]
>>>  1124 | static int cs42l43_runtime_suspend(struct device *dev)
>>>       |            ^~~~~~~~~~~~~~~~~~~~~~~
>>> drivers/mfd/cs42l43.c:1106:12: error: 'cs42l43_resume' defined but not used [-Werror=unused-function]
>>>  1106 | static int cs42l43_resume(struct device *dev)
>>>       |            ^~~~~~~~~~~~~~
>>> drivers/mfd/cs42l43.c:1076:12: error: 'cs42l43_suspend' defined but not used [-Werror=unused-function]
>>>  1076 | static int cs42l43_suspend(struct device *dev)
>>>       |            ^~~~~~~~~~~~~~~
>>>
>>> git bisect pointed to ace6d1448138 ("mfd: cs42l43: Add support for cs42l43 core driver")
>>
>> Since its almost time for v6.6-rc3, so just a quick reminder that this
>> build failure is still not fixed.
> 
> Are you sure? I had expected eb72d5207008db ("mfd: cs42l43: Use correct
> macro for new-style PM runtime ops")[1] that was merged this week would
> have fixed this. Or am I mixing different problems up here?

Ahh, sorry, just noticed Linus merged that fix a few hours after your
mail, so I guess everything should be settled now. Ciao, Thorsten