Hi Pavel, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on shuah-kselftest/next] [also build test WARNING on kees/for-next/execve tip/sched/core linus/master v5.19-rc1 next-20220610] [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/intel-lab-lkp/linux/commits/Pavel-Tikhomirov/Introduce-CABA-helper-process-tree/20220611-003433 base: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git next config: i386-randconfig-a001 (https://download.01.org/0day-ci/archive/20220611/202206110409.b8UJYnuq-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-3) 11.3.0 reproduce (this is a W=1 build): # https://github.com/intel-lab-lkp/linux/commit/0875a2bed5ff95643c487dfcc28a550db06ea418 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Pavel-Tikhomirov/Introduce-CABA-helper-process-tree/20220611-003433 git checkout 0875a2bed5ff95643c487dfcc28a550db06ea418 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash fs/proc/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): fs/proc/array.c: In function 'task_state': >> fs/proc/array.c:157:15: warning: unused variable 'caba_pids' [-Wunused-variable] 157 | pid_t caba_pids[MAX_PID_NS_LEVEL] = {}; | ^~~~~~~~~ >> fs/proc/array.c:156:13: warning: unused variable 'caba_level' [-Wunused-variable] 156 | int caba_level = 0; | ^~~~~~~~~~ >> fs/proc/array.c:155:21: warning: unused variable 'caba_pid' [-Wunused-variable] 155 | struct pid *caba_pid; | ^~~~~~~~ >> fs/proc/array.c:154:29: warning: unused variable 'caba' [-Wunused-variable] 154 | struct task_struct *caba; | ^~~~ vim +/caba_pids +157 fs/proc/array.c 143 144 static inline void task_state(struct seq_file *m, struct pid_namespace *ns, 145 struct pid *pid, struct task_struct *p) 146 { 147 struct user_namespace *user_ns = seq_user_ns(m); 148 struct group_info *group_info; 149 int g, umask = -1; 150 struct task_struct *tracer; 151 const struct cred *cred; 152 pid_t ppid, tpid = 0, tgid, ngid; 153 unsigned int max_fds = 0; > 154 struct task_struct *caba; > 155 struct pid *caba_pid; > 156 int caba_level = 0; > 157 pid_t caba_pids[MAX_PID_NS_LEVEL] = {}; 158 159 rcu_read_lock(); 160 ppid = pid_alive(p) ? 161 task_tgid_nr_ns(rcu_dereference(p->real_parent), ns) : 0; 162 -- 0-DAY CI Kernel Test Service https://01.org/lkp
