samples/kfifo/bytestream-example.c:145:30: warning: unused variable 'fifo_proc_ops'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   d6d09a6942050f21b065a134169002b4d6b701ef
commit: 97a32539b9568bb653683349e5a76d02ff3c3e2c proc: convert everything to "struct proc_ops"
date:   1 year, 7 months ago
config: x86_64-buildonly-randconfig-r001-20210819 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d2b574a4dea5b718e4386bf2e26af0126e5978ce)
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=97a32539b9568bb653683349e5a76d02ff3c3e2c
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 97a32539b9568bb653683349e5a76d02ff3c3e2c
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All warnings (new ones prefixed by >>):

quoted

samples/kfifo/bytestream-example.c:145:30: warning: unused variable 'fifo_proc_ops' [-Wunused-const-variable]

   static const struct proc_ops fifo_proc_ops = {
                                ^
   1 warning generated.
--

quoted

samples/kfifo/inttype-example.c:138:30: warning: unused variable 'fifo_proc_ops' [-Wunused-const-variable]

   static const struct proc_ops fifo_proc_ops = {
                                ^
   1 warning generated.
--

quoted

samples/kfifo/record-example.c:152:30: warning: unused variable 'fifo_proc_ops' [-Wunused-const-variable]

   static const struct proc_ops fifo_proc_ops = {
                                ^
   1 warning generated.


vim +/fifo_proc_ops +145 samples/kfifo/bytestream-example.c

   144	
 > 145	static const struct proc_ops fifo_proc_ops = {
   146		.proc_read	= fifo_read,
   147		.proc_write	= fifo_write,
   148		.proc_lseek	= noop_llseek,
   149	};
   150	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org