On Thu, 24 Nov 2022 21:07:48 +0530 Naresh Kamboju naresh.kamboju@linaro.org wrote:
LKFT CI system noticed clang-15 build failures on x86_64 and i386.
Reported-by: Linux Kernel Functional Testing lkft@linaro.org
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.