linux-kernel - Re: pm.c:undefined reference to `i8042

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Message-Id: <40b5e438-22f4-43e5-9663-db44dd402a35@app.fastmail.com>
Date:   Thu, 07 Dec 2023 01:21:48 +0000
From:   "Jiaxun Yang" <jiaxun.yang@...goat.com>
To:     "Randy Dunlap" <rdunlap@...radead.org>,
        "Arnd Bergmann" <arnd@...db.de>,
        "kernel test robot" <lkp@...el.com>,
        "Masahiro Yamada" <masahiroy@...nel.org>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        "Nicolas Schier" <nicolas@...sle.eu>,
        "linux-mips@...r.kernel.org" <linux-mips@...r.kernel.org>
Subject: Re: pm.c:undefined reference to `i8042_command'



在2023年12月6日十二月 下午5:26，Randy Dunlap写道：
> On 12/5/23 22:52, Arnd Bergmann wrote:
>> On Wed, Dec 6, 2023, at 06:24, Randy Dunlap wrote:
>>>> All errors (new ones prefixed by >>):
>>>>
>>>>    mips64el-linux-ld: arch/mips/loongson2ef/lemote-2f/pm.o: in function `setup_wakeup_events':
>>>>>> pm.c:(.text+0x118): undefined reference to `i8042_command'
>>>>>> mips64el-linux-ld: pm.c:(.text+0x154): undefined reference to `i8042_command'
>>>
>>>
>>> How do we feel about this?
>>> I suppose that an ARCH or mach or board should know what it requires.
>>>
>>>
>>> ---
>>>  arch/mips/loongson2ef/Kconfig |    3 +++
>>>  1 file changed, 3 insertions(+)
>>>
>>> diff -- a/arch/mips/loongson2ef/Kconfig b/arch/mips/loongson2ef/Kconfig
>>> --- a/arch/mips/loongson2ef/Kconfig
>>> +++ b/arch/mips/loongson2ef/Kconfig
>>> @@ -40,6 +40,9 @@ config LEMOTE_MACH2F
>>>  	select ARCH_HAS_PHYS_TO_DMA
>>>  	select ARCH_MIGHT_HAVE_PC_PARPORT
>>>  	select ARCH_MIGHT_HAVE_PC_SERIO
>>> +	select INPUT
>>> +	select SERIO
>>> +	select SERIO_I8042
>>>  	select BOARD_SCACHE
>>>  	select BOOT_ELF32
>> 
>> I think it's bad style to force-select an optional subsystem.
>> How about making the entire file optional? It seems that there
>> are already __weak functions in its place.
>
> Yes, I agree in general.
>
> Hopefully the maintainer will opine your suggestion.
> Jiaxun?

LGTM, PM is not an essential function here.
Arnd, do you mind making it a patch?

Thanks
- Jiaxun

>
> Thanks.
>
>> 
>> --- a/arch/mips/loongson2ef/lemote-2f/Makefile
>> +++ b/arch/mips/loongson2ef/lemote-2f/Makefile
>> @@ -8,5 +8,6 @@ obj-y += clock.o machtype.o irq.o reset.o dma.o ec_kb3310b.o
>>  #
>>  # Suspend Support
>>  #
>> -
>> +ifdef CONFIG_SERIO_I8042
>>  obj-$(CONFIG_SUSPEND) += pm.o
>> +endif
>> 
>>      Arnd
>
> -- 
> ~Randy

-- 
- Jiaxun