[tglx-devel:x86/topology 30/38] arch/x86/kernel/apic/x2apic_phys.c:108:5: warning: no previous prototype for 'x2apic_apic_id_valid'

[kernel test robot <lkp@intel.com>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git x86/topology
head:   59df0262d2da163a8281c806688cc62e4d919908
commit: e2f40f2fdd6f60db02638b295a11feaee036fe70 [30/38] x86/apic: Sanitize APID ID range validation
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20230716/202307160209.TJBfCev3-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce: (https://download.01.org/0day-ci/archive/20230716/202307160209.TJBfCev3-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/202307160209.TJBfCev3-lkp@intel.com/

All warnings (new ones prefixed by >>):

   arch/x86/kernel/apic/x2apic_phys.c:11:30: error: expected '=', ',', ';', 'asm' or '__attribute__' before '__refdatao'
      11 | static u32 x2apic_max_apicid __refdatao;
         |                              ^~~~~~~~~~
   arch/x86/kernel/apic/x2apic_phys.c: In function 'x2apic_set_max_apicid':
   arch/x86/kernel/apic/x2apic_phys.c:15:9: error: 'x2apic_max_apicid' undeclared (first use in this function); did you mean 'x2apic_set_apic_id'?
      15 |         x2apic_max_apicid = apicid;
         |         ^~~~~~~~~~~~~~~~~
         |         x2apic_set_apic_id
   arch/x86/kernel/apic/x2apic_phys.c:15:9: note: each undeclared identifier is reported only once for each function it appears in
   arch/x86/kernel/apic/x2apic_phys.c: In function 'x2apic_phys_probe':
   arch/x86/kernel/apic/x2apic_phys.c:99:40: error: 'x2apic_max_apicid' undeclared (first use in this function); did you mean 'x2apic_set_apic_id'?
      99 |         apic_x2apic_phys.max_apic_id = x2apic_max_apicid;
         |                                        ^~~~~~~~~~~~~~~~~
         |                                        x2apic_set_apic_id
   arch/x86/kernel/apic/x2apic_phys.c: At top level:
>> arch/x86/kernel/apic/x2apic_phys.c:108:5: warning: no previous prototype for 'x2apic_apic_id_valid' [-Wmissing-prototypes]
     108 | int x2apic_apic_id_valid(u32 apicid)
         |     ^~~~~~~~~~~~~~~~~~~~
   arch/x86/kernel/apic/x2apic_phys.c: In function 'x2apic_apic_id_valid':
   arch/x86/kernel/apic/x2apic_phys.c:110:13: error: 'x2apic_max_apicid' undeclared (first use in this function); did you mean 'x2apic_set_apic_id'?
     110 |         if (x2apic_max_apicid && apicid > x2apic_max_apicid)
         |             ^~~~~~~~~~~~~~~~~
         |             x2apic_set_apic_id


vim +/x2apic_apic_id_valid +108 arch/x86/kernel/apic/x2apic_phys.c

9ebd680bd029a9 Suresh Siddha   2011-05-19  106  
981c2eac1cb97c Thomas Gleixner 2017-09-13  107  /* Common x2apic functions, also used by x2apic_cluster */
a774635db5c430 Li RongQing     2018-04-10 @108  int x2apic_apic_id_valid(u32 apicid)
981c2eac1cb97c Thomas Gleixner 2017-09-13  109  {
26573a97746c7a David Woodhouse 2020-10-24  110  	if (x2apic_max_apicid && apicid > x2apic_max_apicid)
26573a97746c7a David Woodhouse 2020-10-24  111  		return 0;
26573a97746c7a David Woodhouse 2020-10-24  112  
981c2eac1cb97c Thomas Gleixner 2017-09-13  113  	return 1;
981c2eac1cb97c Thomas Gleixner 2017-09-13  114  }
981c2eac1cb97c Thomas Gleixner 2017-09-13  115  

:::::: The code at line 108 was first introduced by commit
:::::: a774635db5c430cbf21fa5d2f2df3d23aaa8e782 x86/apic: Fix signedness bug in APIC ID validity checks

:::::: TO: Li RongQing <lirongqing@baidu.com>
:::::: CC: Thomas Gleixner <tglx@linutronix.de>

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