On Tue, Dec 29, 2020 at 04:38:44PM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
> head:   32510cf5e554e8f2cecafea8b8cc11daa4afb9e6
> commit: 32510cf5e554e8f2cecafea8b8cc11daa4afb9e6 [8/8] usb: gadget: u_audio: factorize ssize to alsa fmt conversion
> config: arm-randconfig-r003-20201229 (attached as .config)
> compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project cee1e7d14f4628d6174b33640d502bff3b54ae45)
> 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
>         # install arm cross compiling tool for clang build
>         # apt-get install binutils-arm-linux-gnueabi
>         # https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git/commit/?id=32510cf5e554e8f2cecafea8b8cc11daa4afb9e6
>         git remote add usb https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
>         git fetch --no-tags usb usb-testing
>         git checkout 32510cf5e554e8f2cecafea8b8cc11daa4afb9e6
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm 
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
> 
> All warnings (new ones prefixed by >>):
> 
> >> drivers/usb/gadget/function/u_audio.c:248:9: warning: implicit conversion from 'unsigned long long' to 'unsigned long' changes value from 4294967296 to 0 [-Wconstant-conversion]
>                    ret = SNDRV_PCM_FMTBIT_S24_3LE;
>                        ~ ^~~~~~~~~~~~~~~~~~~~~~~~
>    include/sound/pcm.h:170:34: note: expanded from macro 'SNDRV_PCM_FMTBIT_S24_3LE'
>    #define SNDRV_PCM_FMTBIT_S24_3LE        _SNDRV_PCM_FMTBIT(S24_3LE)
>                                            ^~~~~~~~~~~~~~~~~~~~~~~~~~
>    include/sound/pcm.h:139:39: note: expanded from macro '_SNDRV_PCM_FMTBIT'
>    #define _SNDRV_PCM_FMTBIT(fmt)          (1ULL << (__force int)SNDRV_PCM_FORMAT_##fmt)
>                                             ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>    1 warning generated.

I'm dropping this patch from my tree now, thanks.

greg k-h