Re: [PATCH v11 05/13] mm: HUGE_VMAP arch support cleanup

Hi Nicholas,

I love your patch! Yet something to improve:

[auto build test ERROR on powerpc/next]
[also build test ERROR on arm64/for-next/core v5.11-rc5 next-20210125]
[cannot apply to hnaz-linux-mm/master]
[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]

url:    https://github.com/0day-ci/linux/commits/Nicholas-Piggin/huge-vmalloc-mappings/20210126-143141
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: x86_64-allyesconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/e43d3c665212ea34b790ab8d150bbde9d42e35b8
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Nicholas-Piggin/huge-vmalloc-mappings/20210126-143141
        git checkout e43d3c665212ea34b790ab8d150bbde9d42e35b8
        # 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 <redacted>

All errors (new ones prefixed by >>):

   mm/debug_vm_pgtable.c: In function 'pmd_huge_tests':
   mm/debug_vm_pgtable.c:221:7: error: implicit declaration of function 'arch_ioremap_pmd_supported'; did you mean 'arch_vmap_pmd_supported'? [-Werror=implicit-function-declaration]
     221 |  if (!arch_ioremap_pmd_supported())
         |       ^~~~~~~~~~~~~~~~~~~~~~~~~~
         |       arch_vmap_pmd_supported
   mm/debug_vm_pgtable.c: In function 'pud_huge_tests':

quoted

mm/debug_vm_pgtable.c:343:7: error: implicit declaration of function 'arch_ioremap_pud_supported'; did you mean 'arch_vmap_pud_supported'? [-Werror=implicit-function-declaration]

     343 |  if (!arch_ioremap_pud_supported())
         |       ^~~~~~~~~~~~~~~~~~~~~~~~~~
         |       arch_vmap_pud_supported
   cc1: some warnings being treated as errors


vim +343 mm/debug_vm_pgtable.c

a5c3b9ffb0f404 Anshuman Khandual 2020-08-06  337  
85a144632dcc71 Aneesh Kumar K.V  2020-10-15  338  #ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
a5c3b9ffb0f404 Anshuman Khandual 2020-08-06  339  static void __init pud_huge_tests(pud_t *pudp, unsigned long pfn, pgprot_t prot)
a5c3b9ffb0f404 Anshuman Khandual 2020-08-06  340  {
a5c3b9ffb0f404 Anshuman Khandual 2020-08-06  341  	pud_t pud;
a5c3b9ffb0f404 Anshuman Khandual 2020-08-06  342  
85a144632dcc71 Aneesh Kumar K.V  2020-10-15 @343  	if (!arch_ioremap_pud_supported())
a5c3b9ffb0f404 Anshuman Khandual 2020-08-06  344  		return;
6315df41afccf1 Anshuman Khandual 2020-08-06  345  
6315df41afccf1 Anshuman Khandual 2020-08-06  346  	pr_debug("Validating PUD huge\n");
a5c3b9ffb0f404 Anshuman Khandual 2020-08-06  347  	/*
a5c3b9ffb0f404 Anshuman Khandual 2020-08-06  348  	 * X86 defined pud_set_huge() verifies that the given
a5c3b9ffb0f404 Anshuman Khandual 2020-08-06  349  	 * PUD is not a populated non-leaf entry.
a5c3b9ffb0f404 Anshuman Khandual 2020-08-06  350  	 */
a5c3b9ffb0f404 Anshuman Khandual 2020-08-06  351  	WRITE_ONCE(*pudp, __pud(0));
a5c3b9ffb0f404 Anshuman Khandual 2020-08-06  352  	WARN_ON(!pud_set_huge(pudp, __pfn_to_phys(pfn), prot));
a5c3b9ffb0f404 Anshuman Khandual 2020-08-06  353  	WARN_ON(!pud_clear_huge(pudp));
a5c3b9ffb0f404 Anshuman Khandual 2020-08-06  354  	pud = READ_ONCE(*pudp);
a5c3b9ffb0f404 Anshuman Khandual 2020-08-06  355  	WARN_ON(!pud_none(pud));
a5c3b9ffb0f404 Anshuman Khandual 2020-08-06  356  }
85a144632dcc71 Aneesh Kumar K.V  2020-10-15  357  #else /* !CONFIG_HAVE_ARCH_HUGE_VMAP */
85a144632dcc71 Aneesh Kumar K.V  2020-10-15  358  static void __init pud_huge_tests(pud_t *pudp, unsigned long pfn, pgprot_t prot) { }
85a144632dcc71 Aneesh Kumar K.V  2020-10-15  359  #endif /* !CONFIG_HAVE_ARCH_HUGE_VMAP */
85a144632dcc71 Aneesh Kumar K.V  2020-10-15  360  

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