linux-kernel - Re: [PATCH v3 2/2] clocksource: Add Realtek systimer as tick broadcast driver

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Message-ID: <202511192029.jlDLXPI0-lkp@intel.com>
Date: Wed, 19 Nov 2025 20:34:29 +0800
From: kernel test robot <lkp@...el.com>
To: Hao-Wen Ting <haowen.ting@...ltek.com>, daniel.lezcano@...aro.org,
	tglx@...utronix.de
Cc: oe-kbuild-all@...ts.linux.dev, jinn.cheng@...ltek.com,
	edwardwu@...ltek.com, phelic@...ltek.com,
	shawn.huang724@...ltek.com, haowen.ting@...ltek.com,
	cy.huang@...ltek.com, james.tai@...ltek.com, cylee12@...ltek.com,
	phinex@...ltek.com, conor+dt@...nel.org, krzk+dt@...nel.org,
	robh@...nel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, stanley_chang@...ltek.com
Subject: Re: [PATCH v3 2/2] clocksource: Add Realtek systimer as tick
 broadcast driver

Hi Hao-Wen,

kernel test robot noticed the following build errors:

[auto build test ERROR on 948b99877bf5a1cd58bee930e455b7574daba5c3]

url:    https://github.com/intel-lab-lkp/linux/commits/Hao-Wen-Ting/dt-bindings-timer-Add-Realtek-SYSTIMER/20251117-153806
base:   948b99877bf5a1cd58bee930e455b7574daba5c3
patch link:    https://lore.kernel.org/r/20251117073408.428190-3-haowen.ting%40realtek.com
patch subject: [PATCH v3 2/2] clocksource: Add Realtek systimer as tick broadcast driver
config: arm-randconfig-001-20251119 (https://download.01.org/0day-ci/archive/20251119/202511192029.jlDLXPI0-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251119/202511192029.jlDLXPI0-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202511192029.jlDLXPI0-lkp@intel.com/

All errors (new ones prefixed by >>):

   arm-linux-gnueabi-ld: drivers/clocksource/timer-realtek.o: in function `rtk_syst_clkevt_next_ktime':
>> drivers/clocksource/timer-realtek.c:79: undefined reference to `__aeabi_ldivmod'
>> arm-linux-gnueabi-ld: drivers/clocksource/timer-realtek.c:86: undefined reference to `__aeabi_ldivmod'


vim +79 drivers/clocksource/timer-realtek.c

    71	
    72	static int rtk_syst_clkevt_next_ktime(ktime_t expires,
    73					      struct clock_event_device *clkevt)
    74	{
    75		u64 cmp_val;
    76		unsigned long flags;
    77		ktime_t now = ktime_get();
    78		s64 delta_ns = ktime_to_ns(ktime_sub(expires, now));
  > 79		u64 delta_us = delta_ns / 1000;
    80	
    81		pr_debug("delta_ns = %lld, clkevt.min_delta_ns = %llu\n",
    82			 delta_ns, clkevt->min_delta_ns);
    83	
    84		if (delta_ns <= (s64)clkevt->min_delta_ns) {
    85			delta_ns = clkevt->min_delta_ns;
  > 86			delta_us = delta_ns / 1000;
    87			pr_debug("Clamping delta_ns to min_delta_ns\n");
    88		}
    89	
    90		rtk_cmp_en_write(DSBL);
    91		local_irq_save(flags);
    92		cmp_val = rtk_ts64_read();
    93	
    94		/* Set CMP value to current timestamp plus delta_us */
    95		rtk_cmp_value_write(cmp_val + delta_us);
    96		rtk_cmp_en_write(ENBL);
    97		local_irq_restore(flags);
    98		return 0;
    99	}
   100	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki