Hi Michael, I love your patch! Yet something to improve: [auto build test ERROR on usb/usb-testing] [also build test ERROR on peter.chen-usb/for-usb-next balbi-usb/testing/next v5.13-rc4 next-20210528] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Michael-Grzeschik/usb-gadget-uvc-improve-uvc-gadget-performance/20210531-063238 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing config: arm64-randconfig-r014-20210531 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project bc6799f2f79f0ae87e9f1ebf9d25ba799fbd25a9) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://github.com/0day-ci/linux/commit/16929fc91c22102e12cbd1bfe0473bdc01d3172b git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Michael-Grzeschik/usb-gadget-uvc-improve-uvc-gadget-performance/20210531-063238 git checkout 16929fc91c22102e12cbd1bfe0473bdc01d3172b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>, old ones prefixed by <<): >> ERROR: modpost: "vb2_dma_sg_memops" [drivers/usb/gadget/function/usb_f_uvc.ko] undefined! --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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