CC: [email protected] TO: Peter Zijlstra <[email protected]> CC: Ingo Molnar <[email protected]>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: aab7ee9f8ff0110bfcd594b33dc33748dc1baf46 commit: bccf9048549afe54b3c6bc8979ebfddea748da85 [6599/9127] Merge branch 'locking/core' :::::: branch date: 2 days ago :::::: commit date: 7 days ago config: i386-randconfig-m021-20200719 (attached as .config) compiler: gcc-9 (Debian 9.3.0-14) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> Reported-by: Dan Carpenter <[email protected]> smatch warnings: kernel/time/tick-sched.c:1016 tick_nohz_idle_enter() warn: statement has no effect 3 kernel/time/tick-sched.c:1016 tick_nohz_idle_enter() warn: statement has no effect 3 kernel/time/tick-sched.c:1016 tick_nohz_idle_enter() warn: statement has no effect 3 # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=bccf9048549afe54b3c6bc8979ebfddea748da85 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git remote update linux-next git checkout bccf9048549afe54b3c6bc8979ebfddea748da85 vim +1016 kernel/time/tick-sched.c 554c8aa8ecade2 Rafael J. Wysocki 2018-04-03 1006 0e7767687fdabf Rafael J. Wysocki 2018-04-05 1007 /** 0e7767687fdabf Rafael J. Wysocki 2018-04-05 1008 * tick_nohz_idle_enter - prepare for entering idle on the current CPU 2bbb6817c0ac1b Frederic Weisbecker 2011-10-08 1009 * 0e7767687fdabf Rafael J. Wysocki 2018-04-05 1010 * Called when we start the idle loop. 280f06774afedf Frederic Weisbecker 2011-10-07 1011 */ 1268fbc746ea1c Frederic Weisbecker 2011-11-17 1012 void tick_nohz_idle_enter(void) 280f06774afedf Frederic Weisbecker 2011-10-07 1013 { 280f06774afedf Frederic Weisbecker 2011-10-07 1014 struct tick_sched *ts; 280f06774afedf Frederic Weisbecker 2011-10-07 1015 ebf3adbad012b8 Frederic Weisbecker 2017-11-06 @1016 lockdep_assert_irqs_enabled(); 0db49b72bce263 Linus Torvalds 2012-01-06 1017 1268fbc746ea1c Frederic Weisbecker 2011-11-17 1018 local_irq_disable(); 1268fbc746ea1c Frederic Weisbecker 2011-11-17 1019 22127e93c587af Christoph Lameter 2014-08-17 1020 ts = this_cpu_ptr(&tick_cpu_sched); 23a8d888107ce4 Rafael J. Wysocki 2018-04-05 1021 23a8d888107ce4 Rafael J. Wysocki 2018-04-05 1022 WARN_ON_ONCE(ts->timer_expires_base); 23a8d888107ce4 Rafael J. Wysocki 2018-04-05 1023 280f06774afedf Frederic Weisbecker 2011-10-07 1024 ts->inidle = 1; 0e7767687fdabf Rafael J. Wysocki 2018-04-05 1025 tick_nohz_start_idle(ts); 1268fbc746ea1c Frederic Weisbecker 2011-11-17 1026 1268fbc746ea1c Frederic Weisbecker 2011-11-17 1027 local_irq_enable(); 280f06774afedf Frederic Weisbecker 2011-10-07 1028 } 280f06774afedf Frederic Weisbecker 2011-10-07 1029 :::::: The code at line 1016 was first introduced by commit :::::: ebf3adbad012b89c4a51a3beae718a587d988a3a timers/nohz: Use lockdep to assert IRQs are disabled/enabled :::::: TO: Frederic Weisbecker <[email protected]> :::::: CC: Ingo Molnar <[email protected]> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected]
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