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Date:   Fri, 23 Aug 2019 12:14:17 +0530
From:   Vinod Koul <vkoul@kernel.org>
To:     YueHaibing <yuehaibing@huawei.com>
Cc:     sanyog.r.kale@intel.com, pierre-louis.bossart@linux.intel.com,
        ladis@linux-mips.org, alsa-devel@alsa-project.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 -next] soundwire: Fix -Wunused-function warning
Message-ID: <20190823064417.GC2672@vkoul-mobl>
References: <20190816141409.49940-1-yuehaibing@huawei.com>
 <20190822145408.76272-1-yuehaibing@huawei.com>
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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

> 
> Reported-by: Hulk Robot <hulkci@huawei.com>
> Suggested-by: Ladislav Michl <ladis@linux-mips.org>
> Signed-off-by: YueHaibing <yuehaibing@huawei.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
> 

-- 
~Vinod