Hi Arseniy, [auto build test WARNING on tip/sched/core] [also build test WARNING on v4.3 next-20151106]
url: https://github.com/0day-ci/linux/commits/Arseniy-Krasnov/High-performance-balancing-logic-for-big-LITTLE/20151106-200901 config: x86_64-randconfig-x018-11051832 (attached as .config) reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All warnings (new ones prefixed by >>): kernel/sched/fair.c: In function 'select_task_rq_fair': >> kernel/sched/fair.c:5159:6: warning: suggest explicit braces to avoid >> ambiguous 'else' [-Wparentheses] if (sd_flag & SD_BALANCE_WAKE) /* XXX always ? */ ^ vim +/else +5159 kernel/sched/fair.c 29cd8bae kernel/sched_fair.c Peter Zijlstra 2009-09-17 5143 break; f03542a7 kernel/sched/fair.c Alex Shi 2012-07-26 5144 } 29cd8bae kernel/sched_fair.c Peter Zijlstra 2009-09-17 5145 f03542a7 kernel/sched/fair.c Alex Shi 2012-07-26 5146 if (tmp->flags & sd_flag) c88d5910 kernel/sched_fair.c Peter Zijlstra 2009-09-10 5147 sd = tmp; 63b0e9ed kernel/sched/fair.c Mike Galbraith 2015-07-14 5148 else if (!want_affine) 63b0e9ed kernel/sched/fair.c Mike Galbraith 2015-07-14 5149 break; c88d5910 kernel/sched_fair.c Peter Zijlstra 2009-09-10 5150 } 4ae7d5ce kernel/sched_fair.c Ingo Molnar 2008-03-19 5151 63b0e9ed kernel/sched/fair.c Mike Galbraith 2015-07-14 5152 if (affine_sd) { 63b0e9ed kernel/sched/fair.c Mike Galbraith 2015-07-14 5153 sd = NULL; /* Prefer wake_affine over balance flags */ 63b0e9ed kernel/sched/fair.c Mike Galbraith 2015-07-14 5154 if (cpu != prev_cpu && wake_affine(affine_sd, p, sync)) 63b0e9ed kernel/sched/fair.c Mike Galbraith 2015-07-14 5155 new_cpu = cpu; 8b911acd kernel/sched_fair.c Mike Galbraith 2010-03-11 5156 } 3b640894 kernel/sched_fair.c Peter Zijlstra 2009-09-16 5157 63b0e9ed kernel/sched/fair.c Mike Galbraith 2015-07-14 5158 if (!sd) { 63b0e9ed kernel/sched/fair.c Mike Galbraith 2015-07-14 @5159 if (sd_flag & SD_BALANCE_WAKE) /* XXX always ? */ 9b7aaf11 kernel/sched/fair.c Arseniy Krasnov 2015-11-06 5160 if (IS_ENABLED(CONFIG_HPERF_HMP) && sync) 9b7aaf11 kernel/sched/fair.c Arseniy Krasnov 2015-11-06 5161 new_cpu = prev_cpu; 9b7aaf11 kernel/sched/fair.c Arseniy Krasnov 2015-11-06 5162 else 9b7aaf11 kernel/sched/fair.c Arseniy Krasnov 2015-11-06 5163 new_cpu = select_idle_sibling(p, prev_cpu); 9b7aaf11 kernel/sched/fair.c Arseniy Krasnov 2015-11-06 5164 } else { 9b7aaf11 kernel/sched/fair.c Arseniy Krasnov 2015-11-06 5165 #ifdef CONFIG_HPERF_HMP 9b7aaf11 kernel/sched/fair.c Arseniy Krasnov 2015-11-06 5166 new_cpu = hmp_select_task_rq_fair(p); 9b7aaf11 kernel/sched/fair.c Arseniy Krasnov 2015-11-06 5167 #else :::::: The code at line 5159 was first introduced by commit :::::: 63b0e9edceec10fa41ec33393a1515a5ff444277 sched/fair: Beef up wake_wide() :::::: TO: Mike Galbraith <umgwanakikb...@gmail.com> :::::: CC: Ingo Molnar <mi...@kernel.org> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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