tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: bdffb18b5dd8071cd25685b966f380a30b1fadaa commit: 838b3b76220d5b1bc53e4186d8936c5ec6810bf0 [6492/7272] watchdog/hardlockup: avoid large stack frames in watchdog_hardlockup_check() config: x86_64-randconfig-x012-20230731 (https://download.01.org/0day-ci/archive/20230804/202308041501.2T8kM1gb-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce: (https://download.01.org/0day-ci/archive/20230804/202308041501.2T8kM1gb-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202308041501.2T8kM1gb-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> kernel/watchdog.c:111:12: warning: 'hardlockup_all_cpu_backtrace_proc_handler' defined but not used [-Wunused-function] 111 | static int hardlockup_all_cpu_backtrace_proc_handler(struct ctl_table *table, int write, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/hardlockup_all_cpu_backtrace_proc_handler +111 kernel/watchdog.c 110 > 111 static int hardlockup_all_cpu_backtrace_proc_handler(struct ctl_table *table, int write, 112 void *buffer, size_t *lenp, loff_t *ppos) 113 { 114 int ret; 115 116 ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); 117 118 /* 119 * Only allocate memory for the backtrace mask if userspace actually 120 * wants to trace all CPUs since this can take up 1K of space on a 121 * system with CONFIG_NR_CPUS=8192. 122 */ 123 if (sysctl_hardlockup_all_cpu_backtrace && !hardlockup_backtrace_mask) { 124 hardlockup_backtrace_mask = 125 kzalloc(sizeof(*hardlockup_backtrace_mask), GFP_KERNEL); 126 } else if (!sysctl_hardlockup_all_cpu_backtrace && hardlockup_backtrace_mask) { 127 kfree(hardlockup_backtrace_mask); 128 hardlockup_backtrace_mask = NULL; 129 } 130 131 return ret; 132 } 133 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
