Re: [PATCH v21] tty: Fix the keyboard led light display problem

[kernel test robot <lkp@intel.com>]

Hi lianzhi,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on tty/tty-testing]
[also build test WARNING on linux/master linus/master v5.16-rc5]
[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/lianzhi-chang/tty-Fix-the-keyboard-led-light-display-problem/20211213-204404
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing
config: mips-randconfig-r022-20211213 (https://download.01.org/0day-ci/archive/20211214/202112140304.qPpjdgPQ-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project b6a2ddb6c8ac29412b1361810972e15221fa021c)
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 mips cross compiling tool for clang build
        # apt-get install binutils-mips-linux-gnu
        # https://github.com/0day-ci/linux/commit/8cc658e5dd82e5d70fa3ac9dace8fe62eaed325f
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review lianzhi-chang/tty-Fix-the-keyboard-led-light-display-problem/20211213-204404
        git checkout 8cc658e5dd82e5d70fa3ac9dace8fe62eaed325f
        # 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=mips SHELL=/bin/bash drivers/tty/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   In file included from drivers/tty/sysrq.c:31:
   include/linux/kbd_kern.h:35:27: error: character <U+FF1B> not allowed in an identifier
           unsigned char kbdledctl:1； /* Whether to allow to control the led of the keyboard */
                                    ^~
   include/linux/kbd_kern.h:35:27: error: invalid suffix '；' on integer constant
   In file included from drivers/tty/sysrq.c:51:
   In file included from include/linux/syscalls.h:88:
   In file included from include/trace/syscall.h:7:
   In file included from include/linux/trace_events.h:6:
   In file included from include/linux/ring_buffer.h:7:
>> include/linux/poll.h:142:27: warning: division by zero is undefined [-Wdivision-by-zero]
                   M(RDNORM) | M(RDBAND) | M(WRNORM) | M(WRBAND) |
                                           ^~~~~~~~~
   include/linux/poll.h:140:32: note: expanded from macro 'M'
   #define M(X) (__force __poll_t)__MAP(val, POLL##X, (__force __u16)EPOLL##X)
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/poll.h:126:51: note: expanded from macro '__MAP'
           (from < to ? (v & from) * (to/from) : (v & from) / (from/to))
                                                            ^ ~~~~~~~~~
   include/linux/poll.h:142:39: warning: division by zero is undefined [-Wdivision-by-zero]
                   M(RDNORM) | M(RDBAND) | M(WRNORM) | M(WRBAND) |
                                                       ^~~~~~~~~
   include/linux/poll.h:140:32: note: expanded from macro 'M'
   #define M(X) (__force __poll_t)__MAP(val, POLL##X, (__force __u16)EPOLL##X)
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/poll.h:126:51: note: expanded from macro '__MAP'
           (from < to ? (v & from) * (to/from) : (v & from) / (from/to))
                                                            ^ ~~~~~~~~~
   2 warnings and 2 errors generated.


vim +142 include/linux/poll.h

7a163b2195cda0 Al Viro 2018-02-01  137  
7a163b2195cda0 Al Viro 2018-02-01  138  static inline __poll_t demangle_poll(u16 val)
7a163b2195cda0 Al Viro 2018-02-01  139  {
7a163b2195cda0 Al Viro 2018-02-01  140  #define M(X) (__force __poll_t)__MAP(val, POLL##X, (__force __u16)EPOLL##X)
7a163b2195cda0 Al Viro 2018-02-01  141  	return M(IN) | M(OUT) | M(PRI) | M(ERR) | M(NVAL) |
7a163b2195cda0 Al Viro 2018-02-01 @142  		M(RDNORM) | M(RDBAND) | M(WRNORM) | M(WRBAND) |
7a163b2195cda0 Al Viro 2018-02-01  143  		M(HUP) | M(RDHUP) | M(MSG);
7a163b2195cda0 Al Viro 2018-02-01  144  #undef M
7a163b2195cda0 Al Viro 2018-02-01  145  }
7a163b2195cda0 Al Viro 2018-02-01  146  #undef __MAP
7a163b2195cda0 Al Viro 2018-02-01  147  
7a163b2195cda0 Al Viro 2018-02-01  148  

---
0-DAY CI Kernel Test Service, Intel Corporation
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