linux-kernel - Re: [PATCH] clocksource: timer-sp804: Fix an Oops when read_current_timer is called on ARM32 platforms where the SP804 is not registered as the sched

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Message-ID: <202512250520.APOMkYRQ-lkp@intel.com>
Date: Thu, 25 Dec 2025 06:05:16 +0800
From: kernel test robot <lkp@...el.com>
To: Stephen Eta Zhou <stephen.eta.zhou@...il.com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	groeck7@...il.com, Stephen Eta Zhou <stephen.eta.zhou@...il.com>
Subject: Re: [PATCH] clocksource: timer-sp804: Fix an Oops when
 read_current_timer is called on ARM32 platforms where the SP804 is not
 registered as the sched_clock.

Hi Stephen,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 8f0b4cce4481fb22653697cced8d0d04027cb1e8]

url:    https://github.com/intel-lab-lkp/linux/commits/Stephen-Eta-Zhou/clocksource-timer-sp804-Fix-an-Oops-when-read_current_timer-is-called-on-ARM32-platforms-where-the-SP804-is-not-register/20251219-130527
base:   8f0b4cce4481fb22653697cced8d0d04027cb1e8
patch link:    https://lore.kernel.org/r/20251219-fix_timersp804-v1-1-020e3cde7cf5%40gmail.com
patch subject: [PATCH] clocksource: timer-sp804: Fix an Oops when read_current_timer is called on ARM32 platforms where the SP804 is not registered as the sched_clock.
config: arm-randconfig-r134-20251224 (https://download.01.org/0day-ci/archive/20251225/202512250520.APOMkYRQ-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 4ef602d446057dabf5f61fb221669ecbeda49279)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251225/202512250520.APOMkYRQ-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/202512250520.APOMkYRQ-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/clocksource/timer-sp804.c:112:21: sparse: sparse: symbol 'delay_clkevt' was not declared. Should it be static?

vim +/delay_clkevt +112 drivers/clocksource/timer-sp804.c

   108	
   109	/* Register delay timer backed by the hardware counter */
   110	#ifdef CONFIG_ARM
   111	static struct delay_timer delay;
 > 112	struct sp804_clkevt *delay_clkevt;
   113	

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