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X-CSE-ConnectionGUID: G3ipiCZRQmSCFIvu3ZJlWQ== X-CSE-MsgGUID: Xfgh0v5tQyqcDMENDPCDsA== X-IronPort-AV: E=McAfee;i="6800,10657,11785"; a="79400265" X-IronPort-AV: E=Sophos;i="6.23,234,1770624000"; d="scan'208";a="79400265" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by orvoesa112.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 May 2026 01:38:05 -0700 X-CSE-ConnectionGUID: Vp5QtY92QSeMGVT0OGly0A== X-CSE-MsgGUID: IGAwUXu7QDS+Udf9/WSFEw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,234,1770624000"; d="scan'208";a="276411331" Received: from lkp-server01.sh.intel.com (HELO dca79079c3eb) ([10.239.97.150]) by orviesa001.jf.intel.com with ESMTP; 14 May 2026 01:38:02 -0700 Received: from kbuild by dca79079c3eb with local (Exim 4.98.2) (envelope-from ) id 1wNRZv-000000006Db-0EA2; Thu, 14 May 2026 08:37:59 +0000 Date: Thu, 14 May 2026 16:37:45 +0800 From: kernel test robot To: Lorenzo Stoakes Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, David Hildenbrand , Andrew Morton , Linux Memory Management List , mm-commits@vger.kernel.org Subject: [akpm-mm:mm-unstable 25/274] mm/hugetlb.c:7281:3: error: call to undeclared function '__huge_pmd_unshare'; ISO C99 and later do not support implicit function declarations Message-ID: <202605141638.b5ZBd6IF-lkp@intel.com> User-Agent: s-nail v14.9.25 X-Stat-Signature: j7kk4znea91dykdqtegzei3oqbkgdwxd X-Rspamd-Queue-Id: C9403A0008 X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1778747885-78172 X-HE-Meta: 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 d/VSHimY CYcYxPxr0mebLvfvnzjJ4lkArZRadqYo65U6u86Da0ZwMb5d0bZw5hl5L9zdHJJAuMnYieTv88Pp8f42pbODnGfv+8ZHkBh7FLHjgdddl59406eKjK4FuG0xIIb7OoteDG6NN7HP/yvRgyZ7qxDeOLDYBNv4rv0AGspf3Win+p/pElSviRtumV8spTxjEvu24QyBqnPY52Wsb2hBsUbRHq6PL53H3WMFkQzX8/k592UgKHADwH3GQFCWnka8JR8kOX03LR+56TTsGobCJknKDBRdn3QVzqI2fOVqQMHwFwCllQRc9Y/WaTrXDEmt+YVKJFP8g Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable head: 444fc9435e57157fcf30fc99aee44997f3458641 commit: 2bb8fe16f7bf4487248c9ff847fcf189c45b9508 [25/274] mm/hugetlb: avoid false positive lockdep assertion config: powerpc64-randconfig-001-20260514 (https://download.01.org/0day-ci/archive/20260514/202605141638.b5ZBd6IF-lkp@intel.com/config) compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 5bac06718f502014fade905512f1d26d578a18f3) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260514/202605141638.b5ZBd6IF-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 | Closes: https://lore.kernel.org/oe-kbuild-all/202605141638.b5ZBd6IF-lkp@intel.com/ All errors (new ones prefixed by >>): >> mm/hugetlb.c:7281:3: error: call to undeclared function '__huge_pmd_unshare'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 7281 | __huge_pmd_unshare(&tlb, vma, address, ptep, take_locks); | ^ mm/hugetlb.c:7281:3: note: did you mean 'huge_pmd_unshare'? mm/hugetlb.c:6973:5: note: 'huge_pmd_unshare' declared here 6973 | int huge_pmd_unshare(struct mmu_gather *tlb, struct vm_area_struct *vma, | ^ 1 error generated. vim +/__huge_pmd_unshare +7281 mm/hugetlb.c 7233 7234 /* 7235 * If @take_locks is false, the caller must ensure that no concurrent page table 7236 * access can happen (except for gup_fast() and hardware page walks). 7237 * If @take_locks is true, we take the hugetlb VMA lock (to lock out things like 7238 * concurrent page fault handling) and the file rmap lock. 7239 */ 7240 static void hugetlb_unshare_pmds(struct vm_area_struct *vma, 7241 unsigned long start, 7242 unsigned long end, 7243 bool take_locks) 7244 { 7245 struct hstate *h = hstate_vma(vma); 7246 unsigned long sz = huge_page_size(h); 7247 struct mm_struct *mm = vma->vm_mm; 7248 struct mmu_notifier_range range; 7249 struct mmu_gather tlb; 7250 unsigned long address; 7251 spinlock_t *ptl; 7252 pte_t *ptep; 7253 7254 if (!(vma->vm_flags & VM_MAYSHARE)) 7255 return; 7256 7257 if (start >= end) 7258 return; 7259 7260 flush_cache_range(vma, start, end); 7261 tlb_gather_mmu_vma(&tlb, vma); 7262 7263 /* 7264 * No need to call adjust_range_if_pmd_sharing_possible(), because 7265 * we have already done the PUD_SIZE alignment. 7266 */ 7267 mmu_notifier_range_init(&range, MMU_NOTIFY_CLEAR, 0, mm, 7268 start, end); 7269 mmu_notifier_invalidate_range_start(&range); 7270 if (take_locks) { 7271 hugetlb_vma_lock_write(vma); 7272 i_mmap_lock_write(vma->vm_file->f_mapping); 7273 } else { 7274 i_mmap_assert_write_locked(vma->vm_file->f_mapping); 7275 } 7276 for (address = start; address < end; address += PUD_SIZE) { 7277 ptep = hugetlb_walk(vma, address, sz); 7278 if (!ptep) 7279 continue; 7280 ptl = huge_pte_lock(h, mm, ptep); > 7281 __huge_pmd_unshare(&tlb, vma, address, ptep, take_locks); 7282 spin_unlock(ptl); 7283 } 7284 huge_pmd_unshare_flush(&tlb, vma); 7285 if (take_locks) { 7286 i_mmap_unlock_write(vma->vm_file->f_mapping); 7287 hugetlb_vma_unlock_write(vma); 7288 } 7289 /* 7290 * No need to call mmu_notifier_arch_invalidate_secondary_tlbs(), see 7291 * Documentation/mm/mmu_notifier.rst. 7292 */ 7293 mmu_notifier_invalidate_range_end(&range); 7294 tlb_finish_mmu(&tlb); 7295 } 7296 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki