tree: https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git btree-bulk-loading-5.7 head: 163cf69683aaf1a947d31ba732a17650071780d5 commit: 34b77474267d2c3ee0b3d64e0352d37344fccd16 [78/87] xfs: don't crash with assfail config: parisc-randconfig-a001-20200316 (attached as .config) compiler: hppa64-linux-gcc (GCC) 9.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 34b77474267d2c3ee0b3d64e0352d37344fccd16 # save the attached .config to linux build tree GCC_VERSION=9.2.0 make.cross ARCH=parisc If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from include/linux/mm.h:94, from fs/userfaultfd.c:17: include/asm-generic/pgtable.h: In function 'pte_clear_not_present_full': arch/parisc/include/asm/pgtable.h:96:9: warning: variable 'old_pte' set but not used [-Wunused-but-set-variable] 96 | pte_t old_pte; \ | ^~~~~~~ arch/parisc/include/asm/pgtable.h:322:34: note: in expansion of macro 'set_pte_at' 322 | #define pte_clear(mm, addr, xp) set_pte_at(mm, addr, xp, __pte(0)) | ^~~~~~~~~~ include/asm-generic/pgtable.h:201:2: note: in expansion of macro 'pte_clear' 201 | pte_clear(mm, address, ptep); | ^~~~~~~~~ include/asm-generic/pgtable.h: In function '__ptep_modify_prot_commit': arch/parisc/include/asm/pgtable.h:96:9: warning: variable 'old_pte' set but not used [-Wunused-but-set-variable] 96 | pte_t old_pte; \ | ^~~~~~~ include/asm-generic/pgtable.h:640:2: note: in expansion of macro 'set_pte_at' 640 | set_pte_at(vma->vm_mm, addr, ptep, pte); | ^~~~~~~~~~ In file included from include/linux/mm.h:94, from fs/userfaultfd.c:17: include/asm-generic/hugetlb.h: In function 'huge_pte_clear': arch/parisc/include/asm/pgtable.h:96:9: warning: variable 'old_pte' set but not used [-Wunused-but-set-variable] 96 | pte_t old_pte; \ | ^~~~~~~ arch/parisc/include/asm/pgtable.h:322:34: note: in expansion of macro 'set_pte_at' 322 | #define pte_clear(mm, addr, xp) set_pte_at(mm, addr, xp, __pte(0)) | ^~~~~~~~~~ 39 | pte_clear(mm, addr, ptep); | ^~~~~~~~~ vim +/pte_clear +39 include/asm-generic/hugetlb.h 106c992a5ebef2 Gerald Schaefer 2013-04-29 34 d018498ccc9277 Alexandre Ghiti 2018-10-26 35 #ifndef __HAVE_ARCH_HUGE_PTE_CLEAR 106c992a5ebef2 Gerald Schaefer 2013-04-29 36 static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr, 9386fac34c7cbe Punit Agrawal 2017-07-06 37 pte_t *ptep, unsigned long sz) 106c992a5ebef2 Gerald Schaefer 2013-04-29 38 { 106c992a5ebef2 Gerald Schaefer 2013-04-29 @39 pte_clear(mm, addr, ptep); 106c992a5ebef2 Gerald Schaefer 2013-04-29 40 } 9386fac34c7cbe Punit Agrawal 2017-07-06 41 #endif 106c992a5ebef2 Gerald Schaefer 2013-04-29 42 :::::: The code at line 39 was first introduced by commit :::::: 106c992a5ebef28193cf5958e49ceff5e4aebb04 mm/hugetlb: add more arch-defined huge_pte functions :::::: TO: Gerald Schaefer <gerald.schaefer(a)de.ibm.com&gt; :::::: CC: Linus Torvalds <torvalds(a)linux-foundation.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org