tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 4da34b7d175dc99b8befebd69e96546c960d526c commit: 1ff20307393e17dc57fde62226df625a3a3c36e9 ext4: unconditionally enable the i_version counter date: 3 weeks ago config: x86_64-sof-customedconfig-edison-defconfig compiler: gcc-11 (Debian 11.3.0-8) 11.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1ff20307393e17dc57fde62226df625a3a3c36e9 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 1ff20307393e17dc57fde62226df625a3a3c36e9 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot All errors (new ones prefixed by >>): >> fs/ext4/super.c:1750:19: error: 'deprecated_msg' defined but not used [-Werror=unused-const-variable=] 1750 | static const char deprecated_msg[] = | ^~~~~~~~~~~~~~ cc1: all warnings being treated as errors vim +/deprecated_msg +1750 fs/ext4/super.c 196e402adf2e4c Harshad Shirwadkar 2021-04-01 1749 d60061867303aa Eric Biggers 2017-04-29 @1750 static const char deprecated_msg[] = d60061867303aa Eric Biggers 2017-04-29 1751 "Mount option \"%s\" will be removed by %s\n" 437ca0fda3b442 Dmitry Monakhov 2010-03-01 1752 "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; b3881f74b31b7d Theodore Ts'o 2009-01-05 1753 :::::: The code at line 1750 was first introduced by commit :::::: d60061867303aa2fee516e9a34efc15e78d975a9 ext4: constify static data that is never modified :::::: TO: Eric Biggers :::::: CC: Theodore Ts'o -- 0-DAY CI Kernel Test Service https://01.org/lkp