[openeuler:OLK-6.6 3547/3547] kernel/crash_core.c:749:1: sparse: sparse: symbol '__crash_hotplug_lock' was not declared. Should it be static?

[openeuler:OLK-6.6 3547/3547] kernel/crash_core.c:749:1: sparse: sparse: symbol '__crash_hotplug_lock' was not declared. Should it be static?

[kernel test robot]

tree:   https://gitee.com/openeuler/kernel.git OLK-6.6
head:   04473ee9ed912a16fff0d8846ad565bbf3d63c77
commit: e2a8f20dd8e9df695f736e51cd9115ae55be92d1 [3547/3547] Crash: add lock to serialize crash hotplug handling
config: x86_64-randconfig-122-20251217 (https://download.01.org/0day-ci/archive/20251220/202512202121.96JSWGZX-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251220/202512202121.96JSWGZX-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512202121.96JSWGZX-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> kernel/crash_core.c:749:1: sparse: sparse: symbol '__crash_hotplug_lock' was not declared. Should it be static?

vim +/__crash_hotplug_lock +749 kernel/crash_core.c

   741	
   742	/*
   743	 * Different than kexec/kdump loading/unloading/jumping/shrinking which
   744	 * usually rarely happen, there will be many crash hotplug events notified
   745	 * during one short period, e.g one memory board is hot added and memory
   746	 * regions are online. So mutex lock  __crash_hotplug_lock is used to
   747	 * serialize the crash hotplug handling specifically.
   748	 */
 > 749	DEFINE_MUTEX(__crash_hotplug_lock);
   750	#define crash_hotplug_lock() mutex_lock(&__crash_hotplug_lock)
   751	#define crash_hotplug_unlock() mutex_unlock(&__crash_hotplug_lock)
   752	

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