Hi Michal, Thank you for the patch! Yet something to improve: [auto build test ERROR on hnaz-mm/master] [also build test ERROR on linux/master linus/master v5.15-rc1 next-20210916] [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/Michal-Clapinski/ipc-check-check... base: https://github.com/hnaz/linux-mm master config: microblaze-randconfig-r011-20210916 (attached as .config) compiler: microblaze-linux-gcc (GCC) 11.2.0 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://github.com/0day-ci/linux/commit/a667ba4d29dc378f8692185740d1e0168... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Michal-Clapinski/ipc-check-checkpoint_restore_ns_capable-to-modify-C-R-proc-files/20210917-020956 git checkout a667ba4d29dc378f8692185740d1e016832ca20a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=microblaze If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from include/linux/kernel.h:11, from include/linux/list.h:9, from include/linux/module.h:12, from ipc/ipc_sysctl.c:8: ipc/ipc_sysctl.c: In function 'proc_ipc_dointvec_minmax_checkpoint_restore': 113 | if (write && !checkpoint_restore_ns_capable(user_ns)) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var' 58 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) | ^~~~ ipc/ipc_sysctl.c:113:9: note: in expansion of macro 'if' 113 | if (write && !checkpoint_restore_ns_capable(user_ns)) | ^~ cc1: some warnings being treated as errors vim +/checkpoint_restore_ns_capable +113 ipc/ipc_sysctl.c 106 107 #ifdef CONFIG_CHECKPOINT_RESTORE 108 static int proc_ipc_dointvec_minmax_checkpoint_restore(struct ctl_table *table, 109 int write, void *buffer, size_t *lenp, loff_t *ppos) 110 { 111 struct user_namespace *user_ns = current->nsproxy->ipc_ns->user_ns; 112 114 return -EPERM; 115 116 return proc_ipc_dointvec_minmax(table, write, buffer, lenp, ppos); 117 } 118 #endif 119 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org