Hi Prasad, Thank you for the patch! Yet something to improve: [auto build test ERROR on tip/timers/core] [also build test ERROR on tip/auto-latest tip/timers/nohz v5.6-rc6 next-20200312] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Prasad-Sodagudi/timer-make-defer... base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git d441dceb5dce71150f28add80d36d91bbfccba99 config: nds32-defconfig (attached as .config) compiler: nds32le-linux-gcc (GCC) 9.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=9.2.0 make.cross ARCH=nds32 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): In file included from ./arch/nds32/include/generated/asm/cmpxchg.h:1, from include/asm-generic/atomic.h:12, from ./arch/nds32/include/generated/asm/atomic.h:1, from include/linux/atomic.h:7, from include/asm-generic/bitops/lock.h:5, from include/asm-generic/bitops.h:31, from ./arch/nds32/include/generated/asm/bitops.h:1, from include/linux/bitops.h:29, from include/linux/kernel.h:12, from include/linux/list.h:9, from include/linux/smp.h:12, from include/linux/kernel_stat.h:5, from kernel/time/timer.c:21: kernel/time/timer.c: In function 'run_timer_softirq': 1828 | if ((atomic_cmpxchg(&deferrable_pending, 1, 0) && | ^~~~~~~~~~~~~~~~~~ include/asm-generic/cmpxchg.h:97:17: note: in definition of macro 'cmpxchg_local' 97 | ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\ | ^~~ 196 | #define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new))) | ^~~~~~~ 1828 | if ((atomic_cmpxchg(&deferrable_pending, 1, 0) && | ^~~~~~~~~~~~~~ kernel/time/timer.c:1828:24: note: each undeclared identifier is reported only once for each function it appears in 1828 | if ((atomic_cmpxchg(&deferrable_pending, 1, 0) && | ^~~~~~~~~~~~~~~~~~ include/asm-generic/cmpxchg.h:97:17: note: in definition of macro 'cmpxchg_local' 97 | ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\ | ^~~ 196 | #define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new))) | ^~~~~~~ 1828 | if ((atomic_cmpxchg(&deferrable_pending, 1, 0) && | ^~~~~~~~~~~~~~ kernel/time/timer.c:1831:18: error: 'timer_base_deferrable' undeclared (first use in this function) 1831 | __run_timers(&timer_base_deferrable); | ^~~~~~~~~~~~~~~~~~~~~ kernel/time/timer.c: In function 'init_timer_deferrable_global': kernel/time/timer.c:2073:2: error: 'timer_base_deferrable' undeclared (first use in this function) 2073 | timer_base_deferrable.cpu = nr_cpu_ids; | ^~~~~~~~~~~~~~~~~~~~~ -- In file included from ./arch/nds32/include/generated/asm/cmpxchg.h:1, from include/asm-generic/atomic.h:12, from ./arch/nds32/include/generated/asm/atomic.h:1, from include/linux/atomic.h:7, from include/asm-generic/bitops/lock.h:5, from include/asm-generic/bitops.h:31, from ./arch/nds32/include/generated/asm/bitops.h:1, from include/linux/bitops.h:29, from include/linux/kernel.h:12, from include/linux/list.h:9, from include/linux/smp.h:12, from include/linux/kernel_stat.h:5, from kernel//time/timer.c:21: kernel//time/timer.c: In function 'run_timer_softirq': kernel//time/timer.c:1828:24: error: 'deferrable_pending' undeclared (first use in this function) 1828 | if ((atomic_cmpxchg(&deferrable_pending, 1, 0) && | ^~~~~~~~~~~~~~~~~~ include/asm-generic/cmpxchg.h:97:17: note: in definition of macro 'cmpxchg_local' 97 | ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\ | ^~~ 196 | #define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new))) | ^~~~~~~ kernel//time/timer.c:1828:8: note: in expansion of macro 'atomic_cmpxchg' 1828 | if ((atomic_cmpxchg(&deferrable_pending, 1, 0) && | ^~~~~~~~~~~~~~ kernel//time/timer.c:1828:24: note: each undeclared identifier is reported only once for each function it appears in 1828 | if ((atomic_cmpxchg(&deferrable_pending, 1, 0) && | ^~~~~~~~~~~~~~~~~~ include/asm-generic/cmpxchg.h:97:17: note: in definition of macro 'cmpxchg_local' 97 | ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\ | ^~~ 196 | #define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new))) | ^~~~~~~ kernel//time/timer.c:1828:8: note: in expansion of macro 'atomic_cmpxchg' 1828 | if ((atomic_cmpxchg(&deferrable_pending, 1, 0) && | ^~~~~~~~~~~~~~ kernel//time/timer.c:1831:18: error: 'timer_base_deferrable' undeclared (first use in this function) 1831 | __run_timers(&timer_base_deferrable); | ^~~~~~~~~~~~~~~~~~~~~ kernel//time/timer.c: In function 'init_timer_deferrable_global': kernel//time/timer.c:2073:2: error: 'timer_base_deferrable' undeclared (first use in this function) 2073 | timer_base_deferrable.cpu = nr_cpu_ids; | ^~~~~~~~~~~~~~~~~~~~~ vim +/deferrable_pending +1828 kernel/time/timer.c 1817 1818 /* 1819 * This function runs timers and the timer-tq in bottom half context. 1820 */ 1821 static __latent_entropy void run_timer_softirq(struct softirq_action *h) 1822 { 1823 struct timer_base *base = this_cpu_ptr(&timer_bases[BASE_STD]); 1824 1825 __run_timers(base); 1826 if (IS_ENABLED(CONFIG_NO_HZ_COMMON)) { 1827 __run_timers(this_cpu_ptr(&timer_bases[BASE_DEF])); 1829 tick_do_timer_cpu == TICK_DO_TIMER_NONE) || 1830 tick_do_timer_cpu == smp_processor_id()) 1831 __run_timers(&timer_base_deferrable); 1832 } 1833 } 1834 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org