[hnaz-linux-mm:master 494/523] arch/powerpc/mm/kasan/kasan_init_32.c:124:16: error: implicit declaration of function 'pmd_ptr_k'; did you mean 'pmd_off_k'?

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

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tree:   https://github.com/hnaz/linux-mm master
head:   2bbf0589bfeb27800c730b76eacf34528eee5418
commit: 724648314aafde8dce6440dbc849f80e45b83289 [494/523] mm: pgtable: add shortcuts for accessing kernel PMD and PTE
config: powerpc-randconfig-r002-20200515 (attached as .config)
compiler: powerpc-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 724648314aafde8dce6440dbc849f80e45b83289
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=powerpc 

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

All error/warnings (new ones prefixed by >>, old ones prefixed by <<):

arch/powerpc/mm/kasan/kasan_init_32.c: In function 'kasan_unmap_early_shadow_vmalloc':
>> arch/powerpc/mm/kasan/kasan_init_32.c:124:16: error: implicit declaration of function 'pmd_ptr_k'; did you mean 'pmd_off_k'? [-Werror=implicit-function-declaration]
124 |   pmd_t *pmd = pmd_ptr_k(k_cur);
|                ^~~~~~~~~
|                pmd_off_k
>> arch/powerpc/mm/kasan/kasan_init_32.c:124:16: warning: initialization of 'pmd_t *' {aka 'struct <anonymous> *'} from 'int' makes pointer from integer without a cast [-Wint-conversion]
cc1: some warnings being treated as errors

vim +124 arch/powerpc/mm/kasan/kasan_init_32.c

2edb16efc899f9 Christophe Leroy 2019-04-26  115  
3d4247fcc938d0 Christophe Leroy 2020-01-14  116  static void __init kasan_unmap_early_shadow_vmalloc(void)
3d4247fcc938d0 Christophe Leroy 2020-01-14  117  {
3d4247fcc938d0 Christophe Leroy 2020-01-14  118  	unsigned long k_start = (unsigned long)kasan_mem_to_shadow((void *)VMALLOC_START);
3d4247fcc938d0 Christophe Leroy 2020-01-14  119  	unsigned long k_end = (unsigned long)kasan_mem_to_shadow((void *)VMALLOC_END);
3d4247fcc938d0 Christophe Leroy 2020-01-14  120  	unsigned long k_cur;
3d4247fcc938d0 Christophe Leroy 2020-01-14  121  	phys_addr_t pa = __pa(kasan_early_shadow_page);
3d4247fcc938d0 Christophe Leroy 2020-01-14  122  
3d4247fcc938d0 Christophe Leroy 2020-01-14  123  	for (k_cur = k_start & PAGE_MASK; k_cur < k_end; k_cur += PAGE_SIZE) {
4a93b1104e586f Mike Rapoport    2020-05-16 @124  		pmd_t *pmd = pmd_ptr_k(k_cur);
3d4247fcc938d0 Christophe Leroy 2020-01-14  125  		pte_t *ptep = pte_offset_kernel(pmd, k_cur);
3d4247fcc938d0 Christophe Leroy 2020-01-14  126  
3d4247fcc938d0 Christophe Leroy 2020-01-14  127  		if ((pte_val(*ptep) & PTE_RPN_MASK) != pa)
3d4247fcc938d0 Christophe Leroy 2020-01-14  128  			continue;
3d4247fcc938d0 Christophe Leroy 2020-01-14  129  
3d4247fcc938d0 Christophe Leroy 2020-01-14  130  		__set_pte_at(&init_mm, k_cur, ptep, __pte(0), 0);
3d4247fcc938d0 Christophe Leroy 2020-01-14  131  	}
3d4247fcc938d0 Christophe Leroy 2020-01-14  132  	flush_tlb_kernel_range(k_start, k_end);
3d4247fcc938d0 Christophe Leroy 2020-01-14  133  }
3d4247fcc938d0 Christophe Leroy 2020-01-14  134  

:::::: The code at line 124 was first introduced by commit
:::::: 4a93b1104e586f284c8400200eabf37a51a961bc powerpc-add-support-for-folded-p4d-page-tables-fix

:::::: TO: Mike Rapoport <rppt@linux.ibm.com>
:::::: CC: Johannes Weiner <hannes@cmpxchg.org>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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