tree: https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git btree-private-unions head: 30d91fbcef11ed07350f943fd3f695e0fb0635dd commit: 35137236b91e958ca683fd4a045a29c0b5310938 [52/72] xfs: don't crash with assfail config: parisc-allnoconfig (attached as .config) compiler: hppa-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 35137236b91e958ca683fd4a045a29c0b5310938 # 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///attr.c:11: 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; \ | ^~~~~~~ 640 | set_pte_at(vma->vm_mm, addr, ptep, pte); | ^~~~~~~~~~ vim +/set_pte_at +640 include/asm-generic/pgtable.h 1ea0704e0da65b Jeremy Fitzhardinge 2008-06-16 631 0cbe3e26abe0cf Aneesh Kumar K.V 2019-03-05 632 static inline void __ptep_modify_prot_commit(struct vm_area_struct *vma, 1ea0704e0da65b Jeremy Fitzhardinge 2008-06-16 633 unsigned long addr, 1ea0704e0da65b Jeremy Fitzhardinge 2008-06-16 634 pte_t *ptep, pte_t pte) 1ea0704e0da65b Jeremy Fitzhardinge 2008-06-16 635 { 1ea0704e0da65b Jeremy Fitzhardinge 2008-06-16 636 /* 1ea0704e0da65b Jeremy Fitzhardinge 2008-06-16 637 * The pte is non-present, so there's no hardware state to 1ea0704e0da65b Jeremy Fitzhardinge 2008-06-16 638 * preserve. 1ea0704e0da65b Jeremy Fitzhardinge 2008-06-16 639 */ 0cbe3e26abe0cf Aneesh Kumar K.V 2019-03-05 @640 set_pte_at(vma->vm_mm, addr, ptep, pte); 1ea0704e0da65b Jeremy Fitzhardinge 2008-06-16 641 } 1ea0704e0da65b Jeremy Fitzhardinge 2008-06-16 642 :::::: The code at line 640 was first introduced by commit :::::: 0cbe3e26abe0cfe7effb67f620a77d46cce628b2 mm: update ptep_modify_prot_start/commit to take vm_area_struct as arg :::::: TO: Aneesh Kumar K.V <aneesh.kumar(a)linux.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