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X-CSE-ConnectionGUID: rnJmWbBgTvSkz55HKDDIUA== X-CSE-MsgGUID: N9JZAy7lTP22a3jnGa/czg== X-IronPort-AV: E=McAfee;i="6800,10657,11643"; a="67682257" X-IronPort-AV: E=Sophos;i="6.21,153,1763452800"; d="scan'208";a="67682257" Received: from orviesa008.jf.intel.com ([10.64.159.148]) by orvoesa111.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Dec 2025 04:14:21 -0800 X-CSE-ConnectionGUID: 9NsoZwmqQWKxdFmw4UI3kg== X-CSE-MsgGUID: 5ajR5gmGTO6sJjivMsbeHQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,153,1763452800"; d="scan'208";a="198060024" Received: from igk-lkp-server01.igk.intel.com (HELO 8a0c053bdd2a) ([10.211.93.152]) by orviesa008.jf.intel.com with ESMTP; 16 Dec 2025 04:14:16 -0800 Received: from kbuild by 8a0c053bdd2a with local (Exim 4.98.2) (envelope-from ) id 1vVTwT-0000000035o-3e26; Tue, 16 Dec 2025 12:14:13 +0000 Date: Tue, 16 Dec 2025 13:13:41 +0100 From: kernel test robot To: Zhang Qilong , akpm@linux-foundation.org, david@kernel.org, lorenzo.stoakes@oracle.com, corbet@lwn.net Cc: oe-kbuild-all@lists.linux.dev, ziy@nvidia.com, baolin.wang@linux.alibaba.com, Liam.Howlett@oracle.com, npache@redhat.com, ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com, wangkefeng.wang@huawei.com, sunnanyong@huawei.com, linux-mm@kvack.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Zhang Qilong Subject: Re: [PATCH next 2/2] mm/huge_memory: Add sysfs knob for executable THP COW Message-ID: <202512161328.lAGmHVt0-lkp@intel.com> References: <20251215123407.380813-3-zhangqilong3@huawei.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251215123407.380813-3-zhangqilong3@huawei.com> Hi Zhang, kernel test robot noticed the following build errors: [auto build test ERROR on next-20251215] url: https://github.com/intel-lab-lkp/linux/commits/Zhang-Qilong/mm-huge_memory-Implementation-of-THP-COW-for-executable-file-mmap/20251215-204035 base: next-20251215 patch link: https://lore.kernel.org/r/20251215123407.380813-3-zhangqilong3%40huawei.com patch subject: [PATCH next 2/2] mm/huge_memory: Add sysfs knob for executable THP COW config: x86_64-rhel-9.4 (https://download.01.org/0day-ci/archive/20251216/202512161328.lAGmHVt0-lkp@intel.com/config) compiler: gcc-14 (Debian 14.2.0-19) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251216/202512161328.lAGmHVt0-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/202512161328.lAGmHVt0-lkp@intel.com/ All errors (new ones prefixed by >>): mm/memory.c: In function 'wp_huge_pmd': >> mm/memory.c:6131:13: error: implicit declaration of function 'transparent_hugepage_use_exec_cow' [-Wimplicit-function-declaration] 6131 | if (transparent_hugepage_use_exec_cow() && | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/transparent_hugepage_use_exec_cow +6131 mm/memory.c 6104 6105 /* `inline' is required to avoid gcc 4.1.2 build error */ 6106 static inline vm_fault_t wp_huge_pmd(struct vm_fault *vmf) 6107 { 6108 struct vm_area_struct *vma = vmf->vma; 6109 const bool unshare = vmf->flags & FAULT_FLAG_UNSHARE; 6110 vm_fault_t ret; 6111 6112 if (vma_is_anonymous(vma)) { 6113 if (likely(!unshare) && 6114 userfaultfd_huge_pmd_wp(vma, vmf->orig_pmd)) { 6115 if (userfaultfd_wp_async(vmf->vma)) 6116 goto split; 6117 return handle_userfault(vmf, VM_UFFD_WP); 6118 } 6119 return do_huge_pmd_wp_page(vmf); 6120 } 6121 6122 if (vma->vm_flags & (VM_SHARED | VM_MAYSHARE)) { 6123 if (vma->vm_ops->huge_fault) { 6124 ret = vma->vm_ops->huge_fault(vmf, PMD_ORDER); 6125 if (!(ret & VM_FAULT_FALLBACK)) 6126 return ret; 6127 } 6128 } 6129 6130 > 6131 if (transparent_hugepage_use_exec_cow() && 6132 is_exec_mapping(vma->vm_flags) && 6133 is_cow_mapping(vma->vm_flags)) { 6134 /* Skip special and shmem */ 6135 if (vma_is_special_huge(vma) || vma_is_shmem(vma)) 6136 goto split; 6137 6138 ret = do_huge_pmd_exec_cow(vmf); 6139 if (!(ret & VM_FAULT_FALLBACK)) 6140 return ret; 6141 } 6142 6143 split: 6144 /* COW or write-notify handled on pte level: split pmd. */ 6145 __split_huge_pmd(vma, vmf->pmd, vmf->address, false); 6146 6147 return VM_FAULT_FALLBACK; 6148 } 6149 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki