From: kernel test robot <lkp@intel.com>
To: Chengkaitao <chengkaitao@kylinos.cn>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
David Hildenbrand <david@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Linux Memory Management List <linux-mm@kvack.org>
Subject: [akpm-mm:mm-stable 72/140] arch/sparc/mm/init_64.c:2582:16: error: call to undeclared function 'vmemmap_pgd_populate'; ISO C99 and later do not support implicit function declarations
Date: Wed, 25 Mar 2026 13:23:37 +0800 [thread overview]
Message-ID: <202603251338.grra8xt7-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-stable
head: e393ce79b3cf63c2810be882eb6e531a54f520f4
commit: e504282091c8e4dc4f945c89d9b44ac2e0bfe504 [72/140] mm: convert vmemmap_p?d_populate() to static functions
config: sparc64-randconfig-002-20260325 (https://download.01.org/0day-ci/archive/20260325/202603251338.grra8xt7-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 054e11d1a17e5ba88bb1a8ef32fad3346e80b186)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260325/202603251338.grra8xt7-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/202603251338.grra8xt7-lkp@intel.com/
All errors (new ones prefixed by >>):
>> arch/sparc/mm/init_64.c:2582:16: error: call to undeclared function 'vmemmap_pgd_populate'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
2582 | pgd_t *pgd = vmemmap_pgd_populate(vstart, node);
| ^
arch/sparc/mm/init_64.c:2582:16: note: did you mean 'vmemmap_populate'?
arch/sparc/mm/init_64.c:2565:15: note: 'vmemmap_populate' declared here
2565 | int __meminit vmemmap_populate(unsigned long vstart, unsigned long vend,
| ^
>> arch/sparc/mm/init_64.c:2582:10: error: incompatible integer to pointer conversion initializing 'pgd_t *' with an expression of type 'int' [-Wint-conversion]
2582 | pgd_t *pgd = vmemmap_pgd_populate(vstart, node);
| ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> arch/sparc/mm/init_64.c:2591:9: error: call to undeclared function 'vmemmap_p4d_populate'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
2591 | p4d = vmemmap_p4d_populate(pgd, vstart, node);
| ^
>> arch/sparc/mm/init_64.c:2591:7: error: incompatible integer to pointer conversion assigning to 'p4d_t *' from 'int' [-Wint-conversion]
2591 | p4d = vmemmap_p4d_populate(pgd, vstart, node);
| ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> arch/sparc/mm/init_64.c:2595:9: error: call to undeclared function 'vmemmap_pud_populate'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
2595 | pud = vmemmap_pud_populate(p4d, vstart, node);
| ^
>> arch/sparc/mm/init_64.c:2595:7: error: incompatible integer to pointer conversion assigning to 'pud_t *' from 'int' [-Wint-conversion]
2595 | pud = vmemmap_pud_populate(p4d, vstart, node);
| ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
6 errors generated.
vim +/vmemmap_pgd_populate +2582 arch/sparc/mm/init_64.c
c4bce90ea2069e5 arch/sparc64/mm/init.c David S. Miller 2006-02-11 2563
46644c2477c5890 arch/sparc64/mm/init.c David Miller 2007-10-16 2564 #ifdef CONFIG_SPARSEMEM_VMEMMAP
0aad818b2de455f arch/sparc/mm/init_64.c Johannes Weiner 2013-04-29 @2565 int __meminit vmemmap_populate(unsigned long vstart, unsigned long vend,
7b73d978a5d0d2a arch/sparc/mm/init_64.c Christoph Hellwig 2017-12-29 2566 int node, struct vmem_altmap *altmap)
46644c2477c5890 arch/sparc64/mm/init.c David Miller 2007-10-16 2567 {
46644c2477c5890 arch/sparc64/mm/init.c David Miller 2007-10-16 2568 unsigned long pte_base;
46644c2477c5890 arch/sparc64/mm/init.c David Miller 2007-10-16 2569
46644c2477c5890 arch/sparc64/mm/init.c David Miller 2007-10-16 2570 pte_base = (_PAGE_VALID | _PAGE_SZ4MB_4U |
46644c2477c5890 arch/sparc64/mm/init.c David Miller 2007-10-16 2571 _PAGE_CP_4U | _PAGE_CV_4U |
46644c2477c5890 arch/sparc64/mm/init.c David Miller 2007-10-16 2572 _PAGE_P_4U | _PAGE_W_4U);
46644c2477c5890 arch/sparc64/mm/init.c David Miller 2007-10-16 2573 if (tlb_type == hypervisor)
46644c2477c5890 arch/sparc64/mm/init.c David Miller 2007-10-16 2574 pte_base = (_PAGE_VALID | _PAGE_SZ4MB_4V |
494e5b6faeda1d1 arch/sparc/mm/init_64.c Khalid Aziz 2015-05-27 2575 page_cache4v_flag | _PAGE_P_4V | _PAGE_W_4V);
46644c2477c5890 arch/sparc64/mm/init.c David Miller 2007-10-16 2576
c06240c7f5c39c8 arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2577 pte_base |= _PAGE_PMD_HUGE;
46644c2477c5890 arch/sparc64/mm/init.c David Miller 2007-10-16 2578
c06240c7f5c39c8 arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2579 vstart = vstart & PMD_MASK;
c06240c7f5c39c8 arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2580 vend = ALIGN(vend, PMD_SIZE);
c06240c7f5c39c8 arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2581 for (; vstart < vend; vstart += PMD_SIZE) {
df8ee578894ebb5 arch/sparc/mm/init_64.c Pavel Tatashin 2017-11-15 @2582 pgd_t *pgd = vmemmap_pgd_populate(vstart, node);
c06240c7f5c39c8 arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2583 unsigned long pte;
5637bc504834045 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 2584 p4d_t *p4d;
c06240c7f5c39c8 arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2585 pud_t *pud;
c06240c7f5c39c8 arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2586 pmd_t *pmd;
46644c2477c5890 arch/sparc64/mm/init.c David Miller 2007-10-16 2587
df8ee578894ebb5 arch/sparc/mm/init_64.c Pavel Tatashin 2017-11-15 2588 if (!pgd)
c06240c7f5c39c8 arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2589 return -ENOMEM;
c06240c7f5c39c8 arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2590
5637bc504834045 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 @2591 p4d = vmemmap_p4d_populate(pgd, vstart, node);
5637bc504834045 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 2592 if (!p4d)
5637bc504834045 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 2593 return -ENOMEM;
5637bc504834045 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 2594
5637bc504834045 arch/sparc/mm/init_64.c Mike Rapoport 2019-11-24 @2595 pud = vmemmap_pud_populate(p4d, vstart, node);
df8ee578894ebb5 arch/sparc/mm/init_64.c Pavel Tatashin 2017-11-15 2596 if (!pud)
c06240c7f5c39c8 arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2597 return -ENOMEM;
c06240c7f5c39c8 arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2598
c06240c7f5c39c8 arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2599 pmd = pmd_offset(pud, vstart);
c06240c7f5c39c8 arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2600 pte = pmd_val(*pmd);
c06240c7f5c39c8 arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2601 if (!(pte & _PAGE_VALID)) {
c06240c7f5c39c8 arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2602 void *block = vmemmap_alloc_block(PMD_SIZE, node);
c06240c7f5c39c8 arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2603
c06240c7f5c39c8 arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2604 if (!block)
c06240c7f5c39c8 arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2605 return -ENOMEM;
c06240c7f5c39c8 arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2606
c06240c7f5c39c8 arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2607 pmd_val(*pmd) = pte_base | __pa(block);
46644c2477c5890 arch/sparc64/mm/init.c David Miller 2007-10-16 2608 }
46644c2477c5890 arch/sparc64/mm/init.c David Miller 2007-10-16 2609 }
2856cc2e4d0852c arch/sparc/mm/init_64.c David S. Miller 2012-08-15 2610
c06240c7f5c39c8 arch/sparc/mm/init_64.c David S. Miller 2014-09-24 2611 return 0;
2856cc2e4d0852c arch/sparc/mm/init_64.c David S. Miller 2012-08-15 2612 }
46644c2477c5890 arch/sparc64/mm/init.c David Miller 2007-10-16 2613 #endif /* CONFIG_SPARSEMEM_VMEMMAP */
46644c2477c5890 arch/sparc64/mm/init.c David Miller 2007-10-16 2614
:::::: The code at line 2582 was first introduced by commit
:::::: df8ee578894ebb591c2995cce422e6189c8bb757 sparc64: simplify vmemmap_populate
:::::: TO: Pavel Tatashin <pasha.tatashin@oracle.com>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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