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SubjectRe: [jic23-iio:testing 149/151] drivers/iio/buffer/kfifo_buf.c:165:9: sparse: sparse: cast to restricted __poll_t
On Mon, 11 Oct 2021 04:39:48 +0800
kernel test robot <lkp@intel.com> wrote:

> 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=dc02c5452d3a3c2792efae0b6b436634915384ac
> 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@intel.com>
>
>
> 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);

These should be EPOLLOUT and EPOLLWRNORM I believe. I'll apply a fixup.

> 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
>

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