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-rc6 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/20210202-190833
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: arm64-allyesconfig (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/abe869c9c2e3663ea8c59e730eb5ae0d7206d79b
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Nicholas-Piggin/huge-vmalloc-mappings/20210202-190833
        git checkout abe869c9c2e3663ea8c59e730eb5ae0d7206d79b
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 

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

All errors (new ones prefixed by >>):

   In file included from include/linux/vmalloc.h:13,
                    from include/asm-generic/io.h:911,
                    from arch/arm64/include/asm/io.h:194,
                    from include/linux/io.h:13,
                    from include/linux/irq.h:20,
                    from include/asm-generic/hardirq.h:17,
                    from arch/arm64/include/asm/hardirq.h:17,
                    from include/linux/hardirq.h:10,
                    from include/linux/highmem.h:10,
                    from mm/debug_vm_pgtable.c:14:
   mm/debug_vm_pgtable.c: In function 'pmd_huge_tests':
>> arch/arm64/include/asm/vmalloc.h:19:33: error: too few arguments to function 'arch_vmap_pmd_supported'
      19 | #define arch_vmap_pmd_supported arch_vmap_pmd_supported
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~
   mm/debug_vm_pgtable.c:221:7: note: in expansion of macro 'arch_vmap_pmd_supported'
     221 |  if (!arch_vmap_pmd_supported())
         |       ^~~~~~~~~~~~~~~~~~~~~~~
   arch/arm64/include/asm/vmalloc.h:19:33: note: declared here
      19 | #define arch_vmap_pmd_supported arch_vmap_pmd_supported
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~
   arch/arm64/include/asm/vmalloc.h:20:20: note: in expansion of macro 'arch_vmap_pmd_supported'
      20 | static inline bool arch_vmap_pmd_supported(pgprot_t prot)
         |                    ^~~~~~~~~~~~~~~~~~~~~~~


vim +/arch_vmap_pmd_supported +19 arch/arm64/include/asm/vmalloc.h

    18	
  > 19	#define arch_vmap_pmd_supported arch_vmap_pmd_supported
    20	static inline bool arch_vmap_pmd_supported(pgprot_t prot)
    21	{
    22		/* See arch_vmap_pud_supported() */
    23		return !IS_ENABLED(CONFIG_PTDUMP_DEBUGFS);
    24	}
    25	

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