Hi Cai, I love your patch! Perhaps something to improve: [auto build test WARNING on staging/staging-testing] url: https://github.com/0day-ci/linux/commits/Cai-Huoqing/staging-zynpu-Add-driver-support-for-ARM-China-ZHOUYI-AI-accelerator/20211124-164741 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git 1189d2fb15a4b09b2e8dd01d60a0817d985d933d config: arm64-buildonly-randconfig-r006-20211126 (https://download.01.org/0day-ci/archive/20211127/202111270521.Fwtu770n-lkp@xxxxxxxxx/config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 5162b558d8c0b542e752b037e72a69d5fd51eb1e) 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/95965c589ea2e279e082e3c9aa18c2ddd8494d64 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Cai-Huoqing/staging-zynpu-Add-driver-support-for-ARM-China-ZHOUYI-AI-accelerator/20211124-164741 git checkout 95965c589ea2e279e082e3c9aa18c2ddd8494d64 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/iio/ drivers/irqchip/ drivers/spi/ drivers/staging/zynpu/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/staging/zynpu/zynpu_session.c:747:20: warning: no previous prototype for function 'zynpu_session_get_wait_queue' [-Wmissing-prototypes] wait_queue_head_t *zynpu_session_get_wait_queue(struct zynpu_session *session, int uthread_id) ^ drivers/staging/zynpu/zynpu_session.c:747:1: note: declare 'static' if the function is not intended to be used outside of this translation unit wait_queue_head_t *zynpu_session_get_wait_queue(struct zynpu_session *session, int uthread_id) ^ static 1 warning generated. vim +/zynpu_session_get_wait_queue +747 drivers/staging/zynpu/zynpu_session.c 746 > 747 wait_queue_head_t *zynpu_session_get_wait_queue(struct zynpu_session *session, int uthread_id) 748 { 749 struct zynpu_thread_wait_queue *queue = NULL; 750 751 if (!session) { 752 pr_err("invalid input session to be null!"); 753 return NULL; 754 } 755 756 /* LOCK */ 757 spin_lock(&session->job_lock); 758 queue = get_thread_wait_queue_no_lock(session->wait_queue_head, uthread_id); 759 spin_unlock(&session->job_lock); 760 /* UNLOCK */ 761 762 if (queue) 763 return &queue->p_wait; 764 765 return NULL; 766 } 767 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
