tree: https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git testing head: 687109cbbfd744cba8aea3580770dcf6e13ce12a commit: dc02c5452d3a3c2792efae0b6b436634915384ac [149/151] iio: kfifo-buffer: Add output buffer support config: xtensa-randconfig-s031-20211010 (attached as .config) compiler: xtensa-linux-gcc (GCC) 11.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git/commit/?id=... git remote add jic23-iio https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git git fetch --no-tags jic23-iio testing git checkout dc02c5452d3a3c2792efae0b6b436634915384ac # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=xtensa SHELL=/bin/bash drivers/iio/buffer/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) >> drivers/iio/buffer/kfifo_buf.c:165:9: sparse: sparse: cast to restricted __poll_t vim +165 drivers/iio/buffer/kfifo_buf.c 152 153 static int iio_kfifo_remove_from(struct iio_buffer *r, void *data) 154 { 155 int ret; 156 struct iio_kfifo *kf = iio_to_kfifo(r); 157 158 if (kfifo_size(&kf->kf) < 1) 159 return -EBUSY; 160 161 ret = kfifo_out(&kf->kf, data, 1); 162 if (ret != 1) 163 return -EBUSY; 164 > 165 wake_up_interruptible_poll(&r->pollq, POLLOUT | POLLWRNORM);

166 167 return 0; 168 } 169 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org