Hi Qi,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on hnaz-mm/master]
[also build test ERROR on tip/perf/core tip/x86/core linus/master v5.15 next-20211111]
[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/Qi-Zheng/Free-user-PTE-page-table-pages/20211110-185837
base:   https://github.com/hnaz/linux-mm master
config: ia64-defconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 11.2.0
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/ce86336fbabb116520ad01162faf5c8d4a1ce124
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Qi-Zheng/Free-user-PTE-page-table-pages/20211110-185837
        git checkout ce86336fbabb116520ad01162faf5c8d4a1ce124
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=ia64 

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 >>):

   mm/memory.c: In function 'copy_pmd_range':
>> mm/memory.c:1149:21: error: implicit declaration of function 'is_huge_pmd'; did you mean 'is_hugepd'? [-Werror=implicit-function-declaration]
    1149 |                 if (is_huge_pmd(*src_pmd)) {
         |                     ^~~~~~~~~~~
         |                     is_hugepd
   In file included from <command-line>:
   In function 'zap_pmd_range',
       inlined from 'zap_pud_range' at mm/memory.c:1499:10,
       inlined from 'zap_p4d_range' at mm/memory.c:1520:10,
       inlined from 'unmap_page_range' at mm/memory.c:1541:10:
   include/linux/compiler_types.h:335:45: error: call to '__compiletime_assert_304' declared with attribute error: BUILD_BUG failed
     335 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                             ^
   include/linux/compiler_types.h:316:25: note: in definition of macro '__compiletime_assert'
     316 |                         prefix ## suffix();                             \
         |                         ^~~~~~
   include/linux/compiler_types.h:335:9: note: in expansion of macro '_compiletime_assert'
     335 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |         ^~~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
      39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
         |                                     ^~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:59:21: note: in expansion of macro 'BUILD_BUG_ON_MSG'
      59 | #define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed")
         |                     ^~~~~~~~~~~~~~~~
   include/linux/huge_mm.h:328:27: note: in expansion of macro 'BUILD_BUG'
     328 | #define HPAGE_PMD_SIZE ({ BUILD_BUG(); 0; })
         |                           ^~~~~~~~~
   mm/memory.c:1444:44: note: in expansion of macro 'HPAGE_PMD_SIZE'
    1444 |                         if (next - addr != HPAGE_PMD_SIZE)
         |                                            ^~~~~~~~~~~~~~
   cc1: some warnings being treated as errors
--
   mm/mprotect.c: In function 'change_pmd_range':
>> mm/mprotect.c:260:21: error: implicit declaration of function 'is_huge_pmd'; did you mean 'is_hugepd'? [-Werror=implicit-function-declaration]
     260 |                 if (is_huge_pmd(*pmd)) {
         |                     ^~~~~~~~~~~
         |                     is_hugepd
   In file included from <command-line>:
   In function 'change_pmd_range',
       inlined from 'change_pud_range' at mm/mprotect.c:307:12,
       inlined from 'change_p4d_range' at mm/mprotect.c:327:12,
       inlined from 'change_protection_range' at mm/mprotect.c:352:12:
   include/linux/compiler_types.h:335:45: error: call to '__compiletime_assert_298' declared with attribute error: BUILD_BUG failed
     335 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                             ^
   include/linux/compiler_types.h:316:25: note: in definition of macro '__compiletime_assert'
     316 |                         prefix ## suffix();                             \
         |                         ^~~~~~
   include/linux/compiler_types.h:335:9: note: in expansion of macro '_compiletime_assert'
     335 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |         ^~~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
      39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
         |                                     ^~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:59:21: note: in expansion of macro 'BUILD_BUG_ON_MSG'
      59 | #define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed")
         |                     ^~~~~~~~~~~~~~~~
   include/linux/huge_mm.h:328:27: note: in expansion of macro 'BUILD_BUG'
     328 | #define HPAGE_PMD_SIZE ({ BUILD_BUG(); 0; })
         |                           ^~~~~~~~~
   mm/mprotect.c:261:44: note: in expansion of macro 'HPAGE_PMD_SIZE'
     261 |                         if (next - addr != HPAGE_PMD_SIZE) {
         |                                            ^~~~~~~~~~~~~~
   cc1: some warnings being treated as errors
--
   mm/mremap.c: In function 'move_page_tables':
>> mm/mremap.c:535:21: error: implicit declaration of function 'is_huge_pmd'; did you mean 'is_hugepd'? [-Werror=implicit-function-declaration]
     535 |                 if (is_huge_pmd(*old_pmd)) {
         |                     ^~~~~~~~~~~
         |                     is_hugepd
   In file included from <command-line>:
   include/linux/compiler_types.h:335:45: error: call to '__compiletime_assert_304' declared with attribute error: BUILD_BUG failed
     335 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                             ^
   include/linux/compiler_types.h:316:25: note: in definition of macro '__compiletime_assert'
     316 |                         prefix ## suffix();                             \
         |                         ^~~~~~
   include/linux/compiler_types.h:335:9: note: in expansion of macro '_compiletime_assert'
     335 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |         ^~~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
      39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
         |                                     ^~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:59:21: note: in expansion of macro 'BUILD_BUG_ON_MSG'
      59 | #define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed")
         |                     ^~~~~~~~~~~~~~~~
   include/linux/huge_mm.h:328:27: note: in expansion of macro 'BUILD_BUG'
     328 | #define HPAGE_PMD_SIZE ({ BUILD_BUG(); 0; })
         |                           ^~~~~~~~~
   mm/mremap.c:536:39: note: in expansion of macro 'HPAGE_PMD_SIZE'
     536 |                         if (extent == HPAGE_PMD_SIZE &&
         |                                       ^~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +1149 mm/memory.c

  1132	
  1133	static inline int
  1134	copy_pmd_range(struct vm_area_struct *dst_vma, struct vm_area_struct *src_vma,
  1135		       pud_t *dst_pud, pud_t *src_pud, unsigned long addr,
  1136		       unsigned long end)
  1137	{
  1138		struct mm_struct *dst_mm = dst_vma->vm_mm;
  1139		struct mm_struct *src_mm = src_vma->vm_mm;
  1140		pmd_t *src_pmd, *dst_pmd;
  1141		unsigned long next;
  1142	
  1143		dst_pmd = pmd_alloc(dst_mm, dst_pud, addr);
  1144		if (!dst_pmd)
  1145			return -ENOMEM;
  1146		src_pmd = pmd_offset(src_pud, addr);
  1147		do {
  1148			next = pmd_addr_end(addr, end);
> 1149			if (is_huge_pmd(*src_pmd)) {
  1150				int err;
  1151				VM_BUG_ON_VMA(next-addr != HPAGE_PMD_SIZE, src_vma);
  1152				err = copy_huge_pmd(dst_mm, src_mm, dst_pmd, src_pmd,
  1153						    addr, dst_vma, src_vma);
  1154				if (err == -ENOMEM)
  1155					return -ENOMEM;
  1156				if (!err)
  1157					continue;
  1158				/* fall through */
  1159			}
  1160			if (pmd_none_or_clear_bad(src_pmd))
  1161				continue;
  1162			if (copy_pte_range(dst_vma, src_vma, dst_pmd, src_pmd,
  1163					   addr, next))
  1164				return -ENOMEM;
  1165		} while (dst_pmd++, src_pmd++, addr = next, addr != end);
  1166		return 0;
  1167	}
  1168	

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