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Howlett" , Vlastimil Babka , Jann Horn , Pedro Falcato , Rik van Riel , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH 05/10] mm/mremap: use an explicit uffd failure path for mremap Message-ID: <202507071505.e2HFMCH2-lkp@intel.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 1D45A14000A X-Stat-Signature: sx9jf7rsuawa335miuwq5tih3fnj763q X-HE-Tag: 1751875047-384036 X-HE-Meta: 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 m2UWK+ii QTlcORNTHdGzXUX75U3b2mJVhdOq2+uNhSbTTlHIu4IbF2HyiG+3jE6EXPinaZgZfdkvQUT+fCVHXLX7UTOZAuZjFUdXHGiGXgPj/anmehwL3XLsH1ZxxayYjbOdfqvZeJZhF3zvOHvgh/0gyiUxlmqWhcsHalmKDK55nRFsf/apZKtnRJMzYbhvGzhGZgUpqsAsNY3tkbCVqUNOSwOkhfanYLR5xW+bKumJaY8n0IEBjabLeOgNxAO/9b+jVEm4238J3Vdx5prcCpL9WNxVQz9sIJ8iUc87cSQArjfxIigavSv7Yc/AnM8jUCg== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Lorenzo, kernel test robot noticed the following build errors: [auto build test ERROR on akpm-mm/mm-everything] url: https://github.com/intel-lab-lkp/linux/commits/Lorenzo-Stoakes/mm-mremap-perform-some-simple-cleanups/20250707-133132 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/be3e068c77107d385d89eae634317cb59e04e5ba.1751865330.git.lorenzo.stoakes%40oracle.com patch subject: [PATCH 05/10] mm/mremap: use an explicit uffd failure path for mremap config: i386-buildonly-randconfig-002-20250707 (https://download.01.org/0day-ci/archive/20250707/202507071505.e2HFMCH2-lkp@intel.com/config) compiler: clang version 20.1.7 (https://github.com/llvm/llvm-project 6146a88f60492b520a36f8f8f3231e15f3cc6082) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250707/202507071505.e2HFMCH2-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/202507071505.e2HFMCH2-lkp@intel.com/ All errors (new ones prefixed by >>): >> mm/mremap.c:1739:3: error: call to undeclared function 'mremap_userfaultfd_fail'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 1739 | mremap_userfaultfd_fail(vrm->uf); | ^ mm/mremap.c:1739:3: note: did you mean 'mremap_userfaultfd_prep'? include/linux/userfaultfd_k.h:363:20: note: 'mremap_userfaultfd_prep' declared here 363 | static inline void mremap_userfaultfd_prep(struct vm_area_struct *vma, | ^ 1 error generated. vim +/mremap_userfaultfd_fail +1739 mm/mremap.c 1731 1732 static void notify_uffd(struct vma_remap_struct *vrm, bool failed) 1733 { 1734 struct mm_struct *mm = current->mm; 1735 1736 /* Regardless of success/failure, we always notify of any unmaps. */ 1737 userfaultfd_unmap_complete(mm, vrm->uf_unmap_early); 1738 if (failed) > 1739 mremap_userfaultfd_fail(vrm->uf); 1740 else 1741 mremap_userfaultfd_complete(vrm->uf, vrm->addr, 1742 vrm->new_addr, vrm->old_len); 1743 userfaultfd_unmap_complete(mm, vrm->uf_unmap); 1744 } 1745 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki