On 9/13/2021 8:56 AM, Luis Chamberlain wrote:
> On Fri, Sep 10, 2021 at 06:52:03PM -0700, Nathan Chancellor wrote:
>> On Fri, Sep 10, 2021 at 05:48:23PM -0700, Luis Chamberlain wrote:
>>> On Fri, Sep 10, 2021 at 03:41:31PM +0800, kernel test robot wrote:
>>>> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git 20210908-firmware-builtin-v4
>>>> head:   1c69d6a17750179d68bcaf6b16f9a08d2e475989
>>>> commit: 79e9fce20ee88ffe37542a66277628e6c53dde14 [2/11] firmware_loader: formalize built-in firmware API
>>>> config: hexagon-buildonly-randconfig-r004-20210910 (attached as .config)
>>>> compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 261cbe98c38f8c1ee1a482fe76511110e790f58a)
>>>> reproduce (this is a W=1 build):
>>>>          wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>>>>          chmod +x ~/bin/make.cross
>>>>          # https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git/commit/?id=79e9fce20ee88ffe37542a66277628e6c53dde14
>>>>          git remote add mcgrof-next https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git
>>>>          git fetch --no-tags mcgrof-next 20210908-firmware-builtin-v4
>>>>          git checkout 79e9fce20ee88ffe37542a66277628e6c53dde14
>>>>          # save the attached .config to linux build tree
>>>>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=hexagon
>>>>
>>>> If you fix the issue, kindly add following tag as appropriate
>>>> Reported-by: kernel test robot <lkp@intel.com>
>>>>
>>>> All errors (new ones prefixed by >>):
>>>>
>>>>>> drivers/base/firmware_loader/builtin/main.c:36:6: error: no previous prototype for function 'firmware_is_builtin' [-Werror,-Wmissing-prototypes]
>>>>     bool firmware_is_builtin(const struct firmware *fw)
>>>
>>> This is a lie though its defined on drivers/base/firmware_loader/firmware.h
>>
>> Unless I am missing something, you don't include the firmware_loader
>> copy of firmware.h in builtin/main.c (only the linux one)? Isn't that
>> the source of the warning?
> 
> You would think, but nope, its there:
> 
> #include "firmware.h"

I see that in drivers/base/firmware_loader/main.c but the warning is 
complaining about drivers/base/firmware_loader/builtin/main.c, where I 
only see

#include <linux/firmware.h>

Sorry for the issues with reproducing. For what it's worth, I can 
reproduce this locally and adding

#include "../firmware.h"

to drivers/base/firmware_loader/builtin/main.c fixes it for me.

Cheers,
Nathan