On Mon, Jul 07, 2025 at 03:56:53PM +0800, kernel test robot wrote: > Hi Lorenzo, > > kernel test robot noticed the following build errors: > > [auto build test ERROR on akpm-mm/mm-everything] Thanks for the report, I just need to add a stub for this, will send a fix-patch! Cheers, Lorenzo > > 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@xxxxxxxxx/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@xxxxxxxxx/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@xxxxxxxxx> > | Closes: https://lore.kernel.org/oe-kbuild-all/202507071505.e2HFMCH2-lkp@xxxxxxxxx/ > > 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
