[linux-next:master 5127/5417] mm/page-writeback.c:93:28: error: unused variable 'dirty_bytes_min'

[linux-next:master 5127/5417] mm/page-writeback.c:93:28: error: unused variable 'dirty_bytes_min'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   6d9bd4ad4ca08b1114e814c2c42383b8b13be631
commit: 3eb7a613cb25789b954064cf6e310f6b5ca92c03 [5127/5417] mm: move page-writeback sysctls to their own file
config: hexagon-randconfig-r041-20220213 (https://download.01.org/0day-ci/archive/20220214/202202140744.t6UIHhn5-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project ea071884b0cc7210b3cc5fe858f0e892a779a23b)
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/next/linux-next.git/commit/?id=3eb7a613cb25789b954064cf6e310f6b5ca92c03
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 3eb7a613cb25789b954064cf6e310f6b5ca92c03
        # 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=hexagon SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

>> mm/page-writeback.c:93:28: error: unused variable 'dirty_bytes_min' [-Werror,-Wunused-const-variable]
   static const unsigned long dirty_bytes_min = 2 * PAGE_SIZE;
                              ^
   mm/page-writeback.c:509:12: error: unused function 'dirty_background_ratio_handler' [-Werror,-Wunused-function]
   static int dirty_background_ratio_handler(struct ctl_table *table, int write,
              ^
   mm/page-writeback.c:520:12: error: unused function 'dirty_background_bytes_handler' [-Werror,-Wunused-function]
   static int dirty_background_bytes_handler(struct ctl_table *table, int write,
              ^
   mm/page-writeback.c:531:12: error: unused function 'dirty_ratio_handler' [-Werror,-Wunused-function]
   static int dirty_ratio_handler(struct ctl_table *table, int write, void *buffer,
              ^
   mm/page-writeback.c:545:12: error: unused function 'dirty_bytes_handler' [-Werror,-Wunused-function]
   static int dirty_bytes_handler(struct ctl_table *table, int write,
              ^
   mm/page-writeback.c:2002:12: error: unused function 'dirty_writeback_centisecs_handler' [-Werror,-Wunused-function]
   static int dirty_writeback_centisecs_handler(struct ctl_table *table, int write,
              ^
   6 errors generated.


vim +/dirty_bytes_min +93 mm/page-writeback.c

    91	
    92	/* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */
  > 93	static const unsigned long dirty_bytes_min = 2 * PAGE_SIZE;
    94	

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