tree:   https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git pks/v0.0
head:   b1ddb6750818e99c719da2f60b21e5752f43f0e7
commit: b1ddb6750818e99c719da2f60b21e5752f43f0e7 [27/27] x86/pks: allow PKS with PTI with __GFP_PTE_MAPPED_2
config: x86_64-randconfig-r014-20211103 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git/commit/?id=b1ddb6750818e99c719da2f60b21e5752f43f0e7
        git remote add rppt https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git
        git fetch --no-tags rppt pks/v0.0
        git checkout b1ddb6750818e99c719da2f60b21e5752f43f0e7
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   arch/x86/mm/pgtable.c: In function '_pgd_alloc':
   arch/x86/mm/pgtable.c:493:23: error: implicit declaration of function '__alloc_table'; did you mean 'sg_alloc_table'? [-Werror=implicit-function-declaration]
     493 |   struct page *page = __alloc_table(GFP_PGTABLE_USER,
         |                       ^~~~~~~~~~~~~
         |                       sg_alloc_table
>> arch/x86/mm/pgtable.c:493:23: warning: initialization of 'struct page *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
   arch/x86/mm/pgtable.c: At top level:
   arch/x86/mm/pgtable.c:20:12: warning: '_pks_unprotect' used but never defined
      20 | static int _pks_unprotect(struct page *page, unsigned int cnt);
         |            ^~~~~~~~~~~~~~
   arch/x86/mm/pgtable.c:18:34: warning: 'gpc_pks' defined but not used [-Wunused-variable]
      18 | static struct grouped_page_cache gpc_pks;
         |                                  ^~~~~~~
   cc1: some warnings being treated as errors


vim +493 arch/x86/mm/pgtable.c

   489	
   490	static inline pgd_t *_pgd_alloc(void)
   491	{
   492		if (pks_page_en) {
 > 493			struct page *page = __alloc_table(GFP_PGTABLE_USER,
   494							PGD_ALLOCATION_ORDER);
   495	
   496			if (!page)
   497				return NULL;
   498			return page_address(page);
   499		}
   500	
   501		return (pgd_t *)__get_free_pages(GFP_PGTABLE_USER,
   502						 PGD_ALLOCATION_ORDER);
   503	}
   504	

---
0-DAY CI Kernel Test Service, Intel Corporation
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