tree: https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-6.0.y-rt-rebase head: 0b7c9f35358f2d8cf4082396b8fa4fd1dffce688 commit: 18fb58cf76e27e52aaf792cfc3b3f8d7a1aa2d30 [30/68] softirq: Use a dedicated thread for timer wakeups. config: i386-randconfig-a004-20220926 compiler: gcc-11 (Debian 11.3.0-5) 11.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git/commit/?id=18fb58cf76e27e52aaf792cfc3b3f8d7a1aa2d30 git remote add rt-devel https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git git fetch --no-tags rt-devel linux-6.0.y-rt-rebase git checkout 18fb58cf76e27e52aaf792cfc3b3f8d7a1aa2d30 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot Note: the rt-devel/linux-6.0.y-rt-rebase HEAD 0b7c9f35358f2d8cf4082396b8fa4fd1dffce688 builds fine. It only hurts bisectability. All errors (new ones prefixed by >>): kernel/softirq.c: In function '__irq_exit_rcu': >> kernel/softirq.c:676:54: error: implicit declaration of function 'local_pending_timers' [-Werror=implicit-function-declaration] 676 | if (IS_ENABLED(CONFIG_PREEMPT_RT) && local_pending_timers()) | ^~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/local_pending_timers +676 kernel/softirq.c 662 663 static inline void __irq_exit_rcu(void) 664 { 665 #ifndef __ARCH_IRQ_EXIT_IRQS_DISABLED 666 local_irq_disable(); 667 #else 668 lockdep_assert_irqs_disabled(); 669 #endif 670 account_hardirq_exit(current); 671 preempt_count_sub(HARDIRQ_OFFSET); 672 if (!in_interrupt()) { 673 if (local_softirq_pending()) 674 invoke_softirq(); 675 > 676 if (IS_ENABLED(CONFIG_PREEMPT_RT) && local_pending_timers()) 677 wake_timersd(); 678 } 679 680 tick_irq_exit(); 681 } 682 -- 0-DAY CI Kernel Test Service https://01.org/lkp