linux-kernel - Re: [PATCH v2 -next] soundwire: Fix -Wunused-function warning

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Message-ID: <d4eb9dc5-ac74-2055-003a-7c15f258aaf5@huawei.com>
Date:   Fri, 23 Aug 2019 16:10:43 +0800
From:   Yuehaibing <yuehaibing@...wei.com>
To:     Vinod Koul <vkoul@...nel.org>
CC:     <sanyog.r.kale@...el.com>, <pierre-louis.bossart@...ux.intel.com>,
        <ladis@...ux-mips.org>, <alsa-devel@...a-project.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 -next] soundwire: Fix -Wunused-function warning

On 2019/8/23 14:44, Vinod Koul wrote:
> On 22-08-19, 22:54, YueHaibing wrote:
>> If CONFIG_ACPI is not set, gcc warning this:
>>
>> drivers/soundwire/slave.c:16:12: warning:
>>  'sdw_slave_add' defined but not used [-Wunused-function]
>>
>> Now all code in slave.c is only used on ACPI enabled,
>> so compiles it while CONFIG_ACPI is set.
> 
> Sorry YueHaibing as I have said to other patch doing this, this slave.c
> is acpi specific but Srini has already send DT support for this so it
> doesn't become acpi only and this warn also goes away. We should get the
> DT support soon

Ok, thanks!

> 
>>
>> Reported-by: Hulk Robot <hulkci@...wei.com>
>> Suggested-by: Ladislav Michl <ladis@...ux-mips.org>
>> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
>> ---
>> v2: use obj-$(CONFIG_ACPI) += slave.o
>> ---
>>  drivers/soundwire/Makefile | 3 ++-
>>  drivers/soundwire/slave.c  | 3 ---
>>  2 files changed, 2 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/soundwire/Makefile b/drivers/soundwire/Makefile
>> index 45b7e50..a28bf3e 100644
>> --- a/drivers/soundwire/Makefile
>> +++ b/drivers/soundwire/Makefile
>> @@ -4,8 +4,9 @@
>>  #
>>  
>>  #Bus Objs
>> -soundwire-bus-objs := bus_type.o bus.o slave.o mipi_disco.o stream.o
>> +soundwire-bus-objs := bus_type.o bus.o mipi_disco.o stream.o
>>  obj-$(CONFIG_SOUNDWIRE) += soundwire-bus.o
>> +obj-$(CONFIG_ACPI) += slave.o
>>  
>>  #Cadence Objs
>>  soundwire-cadence-objs := cadence_master.o
>> diff --git a/drivers/soundwire/slave.c b/drivers/soundwire/slave.c
>> index f39a581..0dc188e 100644
>> --- a/drivers/soundwire/slave.c
>> +++ b/drivers/soundwire/slave.c
>> @@ -60,7 +60,6 @@ static int sdw_slave_add(struct sdw_bus *bus,
>>  	return ret;
>>  }
>>  
>> -#if IS_ENABLED(CONFIG_ACPI)
>>  /*
>>   * sdw_acpi_find_slaves() - Find Slave devices in Master ACPI node
>>   * @bus: SDW bus instance
>> @@ -110,5 +109,3 @@ int sdw_acpi_find_slaves(struct sdw_bus *bus)
>>  
>>  	return 0;
>>  }
>> -
>> -#endif
>> -- 
>> 2.7.4
>>
>