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-...@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-...@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 <l...@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202507071505.e2hfmch2-...@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
