From: kernel test robot <lkp@intel.com>
To: David Hildenbrand <david@redhat.com>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Subject: [davidhildenbrand:pat 5/12] mm/damon/vaddr.c:312:6: error: call to undeclared function 'pmd_trans_huge'; ISO C99 and later do not support implicit function declarations
Date: Fri, 9 May 2025 00:08:26 +0800 [thread overview]
Message-ID: <202505082358.fDWiBcNw-lkp@intel.com> (raw)
tree: https://github.com/davidhildenbrand/linux pat
head: bd8eaecd3fc499ee12971c7e4e1522e59c979a77
commit: 86244f66bbc1c4202c7344c1df180beffefc3f4f [5/12] x86/mm/pat: remove old pfnmap tracking interface
config: um-randconfig-002-20250508 (https://download.01.org/0day-ci/archive/20250508/202505082358.fDWiBcNw-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project f819f46284f2a79790038e1f6649172789734ae8)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250508/202505082358.fDWiBcNw-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202505082358.fDWiBcNw-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from mm/damon/vaddr.c:10:
In file included from include/linux/highmem.h:8:
In file included from include/linux/cacheflush.h:5:
In file included from arch/um/include/asm/cacheflush.h:4:
In file included from arch/um/include/asm/tlbflush.h:9:
In file included from include/linux/mm.h:31:
include/linux/pgtable.h:1493:1: error: expected parameter declarator
1493 | {
| ^
include/linux/pgtable.h:1493:1: error: expected ')'
include/linux/pgtable.h:1492:41: note: to match this '('
1492 | static inline int pfnmap_setup_cachemode(unsigned long pfn, unsigned long size,
| ^
In file included from mm/damon/vaddr.c:10:
In file included from include/linux/highmem.h:8:
In file included from include/linux/cacheflush.h:5:
In file included from arch/um/include/asm/cacheflush.h:4:
In file included from arch/um/include/asm/tlbflush.h:9:
include/linux/mm.h:1898:9: error: call to undeclared function 'is_zero_pfn'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1898 | return is_zero_pfn(page_to_pfn(page));
| ^
In file included from mm/damon/vaddr.c:12:
include/linux/mman.h:157:9: warning: division by zero is undefined [-Wdivision-by-zero]
157 | _calc_vm_trans(flags, MAP_SYNC, VM_SYNC ) |
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/mman.h:135:21: note: expanded from macro '_calc_vm_trans'
135 | : ((x) & (bit1)) / ((bit1) / (bit2))))
| ^ ~~~~~~~~~~~~~~~~~
include/linux/mman.h:158:9: warning: division by zero is undefined [-Wdivision-by-zero]
158 | _calc_vm_trans(flags, MAP_STACK, VM_NOHUGEPAGE) |
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/mman.h:135:21: note: expanded from macro '_calc_vm_trans'
135 | : ((x) & (bit1)) / ((bit1) / (bit2))))
| ^ ~~~~~~~~~~~~~~~~~
>> mm/damon/vaddr.c:312:6: error: call to undeclared function 'pmd_trans_huge'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
312 | if (pmd_trans_huge(pmdp_get(pmd))) {
| ^
2 warnings and 4 errors generated.
vim +/pmd_trans_huge +312 mm/damon/vaddr.c
3f49584b262cf8 SeongJae Park 2021-09-07 304
3f49584b262cf8 SeongJae Park 2021-09-07 305 static int damon_mkold_pmd_entry(pmd_t *pmd, unsigned long addr,
3f49584b262cf8 SeongJae Park 2021-09-07 306 unsigned long next, struct mm_walk *walk)
3f49584b262cf8 SeongJae Park 2021-09-07 307 {
3f49584b262cf8 SeongJae Park 2021-09-07 308 pte_t *pte;
e7ee3f9791f560 Levi Yun 2023-07-28 309 pmd_t pmde;
3f49584b262cf8 SeongJae Park 2021-09-07 310 spinlock_t *ptl;
3f49584b262cf8 SeongJae Park 2021-09-07 311
e7ee3f9791f560 Levi Yun 2023-07-28 @312 if (pmd_trans_huge(pmdp_get(pmd))) {
3f49584b262cf8 SeongJae Park 2021-09-07 313 ptl = pmd_lock(walk->mm, pmd);
e7ee3f9791f560 Levi Yun 2023-07-28 314 pmde = pmdp_get(pmd);
e7ee3f9791f560 Levi Yun 2023-07-28 315
e7ee3f9791f560 Levi Yun 2023-07-28 316 if (!pmd_present(pmde)) {
c8b9aff419303e Baolin Wang 2022-08-18 317 spin_unlock(ptl);
c8b9aff419303e Baolin Wang 2022-08-18 318 return 0;
c8b9aff419303e Baolin Wang 2022-08-18 319 }
c8b9aff419303e Baolin Wang 2022-08-18 320
e7ee3f9791f560 Levi Yun 2023-07-28 321 if (pmd_trans_huge(pmde)) {
c11d34fa139e4b Ryan Roberts 2023-06-02 322 damon_pmdp_mkold(pmd, walk->vma, addr);
3f49584b262cf8 SeongJae Park 2021-09-07 323 spin_unlock(ptl);
3f49584b262cf8 SeongJae Park 2021-09-07 324 return 0;
3f49584b262cf8 SeongJae Park 2021-09-07 325 }
3f49584b262cf8 SeongJae Park 2021-09-07 326 spin_unlock(ptl);
3f49584b262cf8 SeongJae Park 2021-09-07 327 }
3f49584b262cf8 SeongJae Park 2021-09-07 328
3f49584b262cf8 SeongJae Park 2021-09-07 329 pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl);
7780d04046a228 Hugh Dickins 2023-06-08 330 if (!pte) {
7780d04046a228 Hugh Dickins 2023-06-08 331 walk->action = ACTION_AGAIN;
7780d04046a228 Hugh Dickins 2023-06-08 332 return 0;
7780d04046a228 Hugh Dickins 2023-06-08 333 }
c33c794828f212 Ryan Roberts 2023-06-12 334 if (!pte_present(ptep_get(pte)))
3f49584b262cf8 SeongJae Park 2021-09-07 335 goto out;
c11d34fa139e4b Ryan Roberts 2023-06-02 336 damon_ptep_mkold(pte, walk->vma, addr);
3f49584b262cf8 SeongJae Park 2021-09-07 337 out:
3f49584b262cf8 SeongJae Park 2021-09-07 338 pte_unmap_unlock(pte, ptl);
3f49584b262cf8 SeongJae Park 2021-09-07 339 return 0;
3f49584b262cf8 SeongJae Park 2021-09-07 340 }
3f49584b262cf8 SeongJae Park 2021-09-07 341
:::::: The code at line 312 was first introduced by commit
:::::: e7ee3f9791f5601fc032b222a70a02b9798784be damon: use pmdp_get instead of drectly dereferencing pmd
:::::: TO: Levi Yun <ppbuk5246@gmail.com>
:::::: CC: Andrew Morton <akpm@linux-foundation.org>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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