linux-kernel - Re: [PATCH -next] misc: rtsx: fix build for CONFIG

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Message-ID: <449d6ceb-7308-9543-c23c-831bebffda21@infradead.org>
Date:   Sun, 27 Feb 2022 08:57:40 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Wei WANG <wei_wang@...lsil.com.cn>,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH -next] misc: rtsx: fix build for CONFIG_PM not set



On 2/27/22 04:04, Arnd Bergmann wrote:
> On Sat, Feb 26, 2022 at 11:24 PM Randy Dunlap <rdunlap@...radead.org> wrote:
> 
>> ---
>>  drivers/misc/cardreader/rtsx_pcr.c |    2 ++
>>  1 file changed, 2 insertions(+)
>>
>> --- linux-next-20220225.orig/drivers/misc/cardreader/rtsx_pcr.c
>> +++ linux-next-20220225/drivers/misc/cardreader/rtsx_pcr.c
>> @@ -1054,6 +1054,7 @@ static int rtsx_pci_acquire_irq(struct r
>>         return 0;
>>  }
>>
>> +#ifdef CONFIG_PM
>>  static void rtsx_enable_aspm(struct rtsx_pcr *pcr)
>>  {
>>         if (pcr->ops->set_aspm)
>> @@ -1085,6 +1086,7 @@ static void rtsx_pm_power_saving(struct
>>  {
>>         rtsx_comm_pm_power_saving(pcr);
>>  }
>> +#endif
> 
> Now that we have DEFINE_SIMPLE_DEV_PM_OPS() etc, I think we should
> no longer add more __maybe_unused annotations or #ifdef CONFIG_PM checks
> but just use the new macros for any new files or whenever a warning like
> this shows up.

In this case it looks like DEFINE_RUNTIME_DEV_PM_OPS() is better.
Using DEFINE_SIMPLE_DEV_PM_OPS() still produces build warnings/errors
for unused functions. And I do see 4 drivers that are already using
DEFINE_RUNTIME_DEV_PM_OPS().

Patch coming right up.

thanks.
-- 
~Randy