Re: [RFC PATCH v1 4/7] x86: ibs: In-kernel IBS driver for memory access profiling

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

Hi Bharata,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build errors:

[auto build test ERROR on linus/master]
[also build test ERROR on v6.17-rc1]
[cannot apply to akpm-mm/mm-everything tip/x86/core tip/x86/mm next-20250815]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Bharata-B-Rao/mm-migrate-Allow-misplaced-migration-without-VMA-too/20250814-215419
base:   linus/master
patch link:    https://lore.kernel.org/r/20250814134826.154003-5-bharata%40amd.com
patch subject: [RFC PATCH v1 4/7] x86: ibs: In-kernel IBS driver for memory access profiling
config: i386-buildonly-randconfig-003-20250815 (https://download.01.org/0day-ci/archive/20250815/202508151720.OkJ7smVC-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250815/202508151720.OkJ7smVC-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/202508151720.OkJ7smVC-lkp@intel.com/

All errors (new ones prefixed by >>):

   arch/x86/mm/ibs.c:198:19: warning: shift count >= width of type [-Wshift-count-overflow]
     198 |         if (laddr & (1UL << 63)) {
         |                          ^  ~~
>> arch/x86/mm/ibs.c:252:7: error: call to undeclared function 'setup_APIC_eilvt'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     252 |         if (!setup_APIC_eilvt(offset, 0, APIC_EILVT_MSG_NMI, 0))
         |              ^
   arch/x86/mm/ibs.c:252:7: note: did you mean 'setup_APIC_ibs'?
   arch/x86/mm/ibs.c:244:13: note: 'setup_APIC_ibs' declared here
     244 | static void setup_APIC_ibs(void)
         |             ^
     245 | {
     246 |         int offset;
     247 | 
     248 |         offset = get_ibs_lvt_offset();
     249 |         if (offset < 0)
     250 |                 goto failed;
     251 | 
     252 |         if (!setup_APIC_eilvt(offset, 0, APIC_EILVT_MSG_NMI, 0))
         |              ~~~~~~~~~~~~~~~~
         |              setup_APIC_ibs
   arch/x86/mm/ibs.c:265:3: error: call to undeclared function 'setup_APIC_eilvt'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     265 |                 setup_APIC_eilvt(offset, 0, APIC_EILVT_MSG_FIX, 1);
         |                 ^
   1 warning and 2 errors generated.


vim +/setup_APIC_eilvt +252 arch/x86/mm/ibs.c

   243	
   244	static void setup_APIC_ibs(void)
   245	{
   246		int offset;
   247	
   248		offset = get_ibs_lvt_offset();
   249		if (offset < 0)
   250			goto failed;
   251	
 > 252		if (!setup_APIC_eilvt(offset, 0, APIC_EILVT_MSG_NMI, 0))
   253			return;
   254	failed:
   255		pr_warn("IBS APIC setup failed on cpu #%d\n",
   256			smp_processor_id());
   257	}
   258	

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