Hi Tony, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: fb57b1fabcb28f358901b2df90abd2b48abc1ca8 commit: aba1ad05da088944a62eb87fb0cd8391152e8985 [10267/10701] clocksource/drivers/timer-ti-dm: Add clockevent and clocksource support config: arm-randconfig-r013-20200519 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout aba1ad05da088944a62eb87fb0cd8391152e8985 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): drivers/clocksource/timer-ti-dm-systimer.c: In function 'dmtimer_clockevent_init': 517 | u32 pa; | ^~ drivers/clocksource/timer-ti-dm-systimer.c: In function 'dmtimer_clocksource_init': drivers/clocksource/timer-ti-dm-systimer.c:640:6: warning: variable 'pa' set but not used [-Wunused-but-set-variable] 640 | u32 pa; | ^~ vim +/pa +517 drivers/clocksource/timer-ti-dm-systimer.c 510 511 static int __init dmtimer_clockevent_init(struct device_node *np) 512 { 513 struct dmtimer_clockevent *clkevt; 514 struct clock_event_device *dev; 515 struct dmtimer_systimer *t; 516 int error; 518 519 clkevt = kzalloc(sizeof(*clkevt), GFP_KERNEL); 520 if (!clkevt) 521 return -ENOMEM; 522 523 t = &clkevt->t; 524 dev = &clkevt->dev; 525 526 /* 527 * We mostly use cpuidle_coupled with ARM local timers for runtime, 528 * so there's probably no use for CLOCK_EVT_FEAT_DYNIRQ here. 529 */ 530 dev->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT; 531 dev->rating = 300; 532 dev->set_next_event = dmtimer_set_next_event; 533 dev->set_state_shutdown = dmtimer_clockevent_shutdown; 534 dev->set_state_periodic = dmtimer_set_periodic; 535 dev->set_state_oneshot = dmtimer_clockevent_shutdown; 536 dev->tick_resume = dmtimer_clockevent_shutdown; 537 dev->cpumask = cpu_possible_mask; 538 539 dev->irq = irq_of_parse_and_map(np, 0); 540 if (!dev->irq) { 541 error = -ENXIO; 542 goto err_out_free; 543 } 544 545 error = dmtimer_systimer_setup(np, &clkevt->t); 546 if (error) 547 goto err_out_free; 548 549 clkevt->period = 0xffffffff - DIV_ROUND_CLOSEST(t->rate, HZ); 550 551 /* 552 * For clock-event timers we never read the timer counter and 553 * so we are not impacted by errata i103 and i767. Therefore, 554 * we can safely ignore this errata for clock-event timers. 555 */ 556 writel_relaxed(OMAP_TIMER_CTRL_POSTED, t->base + t->ifctrl); 557 558 error = request_irq(dev->irq, dmtimer_clockevent_interrupt, 559 IRQF_TIMER, "clockevent", clkevt); 560 if (error) 561 goto err_out_unmap; 562 563 writel_relaxed(OMAP_TIMER_INT_OVERFLOW, t->base + t->irq_ena); 564 writel_relaxed(OMAP_TIMER_INT_OVERFLOW, t->base + t->wakeup); 565 566 pa = of_translate_address(np, of_get_address(np, 0, NULL, NULL)); 567 pr_info("TI gptimer clockevent: %s%lu Hz at %pOF\n", 568 of_find_property(np, "ti,timer-alwon", NULL) ? 569 "always-on " : "", t->rate, np->parent); 570 571 clockevents_config_and_register(dev, t->rate, 572 3, /* Timer internal resynch latency */ 573 0xffffffff); 574 575 if (of_device_is_compatible(np, "ti,am33xx") || 576 of_device_is_compatible(np, "ti,am43")) { 577 dev->suspend = omap_clockevent_idle; 578 dev->resume = omap_clockevent_unidle; 579 } 580 581 return 0; 582 583 err_out_unmap: 584 iounmap(t->base); 585 586 err_out_free: 587 kfree(clkevt); 588 589 return error; 590 } 591 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org