On Thu, 24 Nov 2022 21:07:48 +0530 Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> wrote: > LKFT CI system noticed clang-15 build failures on x86_64 and i386. > > Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx> > > make --silent --keep-going --jobs=8 > O=/home/tuxbuild/.cache/tuxmake/builds/1/build LLVM=1 LLVM_IAS=1 > ARCH=x86_64 SRCARCH=x86 CROSS_COMPILE=x86_64-linux-gnu- > 'HOSTCC=sccache clang' 'CC=sccache clang' > mm/khugepaged.c:1428:45: error: variable 'pmd' is uninitialized when > used here [-Werror,-Wuninitialized] > page_table_check_pte_clear_range(mm, addr, pmd); > ^~~ > mm/khugepaged.c:1415:2: note: variable 'pmd' is declared here > pmd_t pmd; > ^ Thanks. Due to "mm/khugepaged: fix GUP-fast interaction by freeing ptes via mmu_gather". Jann, I'll just do this for now: --- a/mm/khugepaged.c~mm-khugepaged-fix-gup-fast-interaction-by-freeing-ptes-via-mmu_gather-fix +++ a/mm/khugepaged.c @@ -1431,7 +1431,6 @@ static void collapse_and_free_pmd(struct */ if (vma->anon_vma) lockdep_assert_held_write(&vma->anon_vma->root->rwsem); - page_table_check_pte_clear_range(mm, addr, pmd); tlb_gather_mmu(&tlb, mm); pmd = READ_ONCE(*pmdp); _ please check.
