linux-kernel - Re: [PATCH] tee: add forward declaration for struct device

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Date:   Wed, 14 Jun 2017 13:06:08 +0200
From:   Jerome Forissier <jerome.forissier@...aro.org>
To:     Arnd Bergmann <arnd@...db.de>,
        Jens Wiklander <jens.wiklander@...aro.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        tee-dev@...ts.linaro.org
Subject: Re: [PATCH] tee: add forward declaration for struct device



On 06/14/2017 01:01 PM, Arnd Bergmann wrote:
> On Wed, Jun 14, 2017 at 11:46 AM, Jens Wiklander
> <jens.wiklander@...aro.org> wrote:
>> On Wed, Jun 14, 2017 at 11:39:50AM +0200, Jerome Forissier wrote:
>>> [+Arnd]
>>>
>>> Ping?
>>>
>>> Thanks,
>>> --
>>> Jerome
>>>
>>> On 05/31/2017 01:21 PM, Jerome Forissier wrote:
>>>> tee_drv.h references struct device, but does not include device.h nor
>>>> platform_device.h. Therefore, if tee_drv.h is included by some file
>>>> that does not pull device.h nor platform_device.h beforehand, we have a
>>>> compile warning. Fix this by adding a forward declaration.
>>>>
>>>> Signed-off-by: Jerome Forissier <jerome.forissier@...aro.org>
> 
> Acked-by: Arnd Bergmann <arnd@...db.de>
> 
> Do we need this to fix a warning in mainline, in linux-next, or only
> in combination with some other patches?

Only with some other patches.

-- 
Jerome

> I have not run into this warning in my build testing.
> 
>>>>  include/linux/tee_drv.h | 1 +
>>>>  1 file changed, 1 insertion(+)
>>>>
>>>> diff --git a/include/linux/tee_drv.h b/include/linux/tee_drv.h
>>>> index 8614713..07bd226 100644
>>>> --- a/include/linux/tee_drv.h
>>>> +++ b/include/linux/tee_drv.h
>>>> @@ -29,6 +29,7 @@
>>>>  #define TEE_SHM_DMA_BUF            BIT(1)  /* Memory with dma-buf handle */
>>>>  #define TEE_SHM_EXT_DMA_BUF        BIT(2)  /* Memory with dma-buf handle */
>>>>
>>>> +struct device;
>>>>  struct tee_device;
>>>>  struct tee_shm;
>>>>  struct tee_shm_pool;
>>>>
>>
>> Looks good to me.
>>
>> Reviewed-by: Jens Wiklander <jens.wiklander@...aro.org>
> 
> Can you pick up the patch in your git tree and send a pull request for
> the appropriate release (4.12-fixes or 4.13)?
> 
> If you don't expect to send anything else for tee in that release,
> you can also forward the patch to arm@...nel.org and ask for
> inclusion. If you just reply with the 'Reviewed-by', I would not
> expect to have to do anything in the arm-soc tree.
> 
>      Arnd
>