tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git tmp.tmp2 head: adcceb5eb7aee38e4a9c15bdf599655f0e1b1324 commit: 9073ccabaa37f3392a6888678ffc6968fcdca9b6 [362/364] sched/headers: Misc dependency fixes config: i386-defconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=90... git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git git fetch --no-tags tip tmp.tmp2 git checkout 9073ccabaa37f3392a6888678ffc6968fcdca9b6 # save the attached .config to linux build tree make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from arch/x86/include/asm/uaccess.h:464, from include/linux/uaccess.h:13, from arch/x86/include/asm/fpu/xstate.h:5, from arch/x86/include/asm/pgtable.h:26, from include/linux/pgtable.h:6, from include/linux/mm.h:35, from kernel/power/snapshot.c:19: 18 | raw_copy_to_user(void __user *to, const void *from, unsigned long n) | ^~~~~~~~~~~~~~~~ In file included from kernel/power/snapshot.c:15: arch/x86/include/asm/uaccess_64.h:56:1: note: previous definition of 'raw_copy_to_user' was here 56 | raw_copy_to_user(void __user *dst, const void *src, unsigned long size) | ^~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/uaccess.h:464, from include/linux/uaccess.h:13, from arch/x86/include/asm/fpu/xstate.h:5, from arch/x86/include/asm/pgtable.h:26, from include/linux/pgtable.h:6, from include/linux/mm.h:35, from kernel/power/snapshot.c:19: 24 | raw_copy_from_user(void *to, const void __user *from, unsigned long n) | ^~~~~~~~~~~~~~~~~~ In file included from kernel/power/snapshot.c:15: arch/x86/include/asm/uaccess_64.h:50:1: note: previous definition of 'raw_copy_from_user' was here 50 | raw_copy_from_user(void *dst, const void __user *src, unsigned long size) | ^~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/uaccess.h:464, from include/linux/uaccess.h:13, from arch/x86/include/asm/fpu/xstate.h:5, from arch/x86/include/asm/pgtable.h:26, from include/linux/pgtable.h:6, from include/linux/mm.h:35, from kernel/power/snapshot.c:19: 30 | __copy_from_user_inatomic_nocache(void *to, const void __user *from, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from kernel/power/snapshot.c:15: arch/x86/include/asm/uaccess_64.h:76:1: note: previous definition of '__copy_from_user_inatomic_nocache' was here 76 | __copy_from_user_inatomic_nocache(void *dst, const void __user *src, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/uaccess.h:13, from arch/x86/include/asm/fpu/xstate.h:5, from arch/x86/include/asm/pgtable.h:26, from include/linux/pgtable.h:6, from include/linux/mm.h:35, from kernel/power/snapshot.c:19: arch/x86/include/asm/uaccess.h:46:20: warning: 'pagefault_disabled' used but never defined 46 | static inline bool pagefault_disabled(void); | ^~~~~~~~~~~~~~~~~~ vim +/raw_copy_to_user +18 arch/x86/include/asm/uaccess_32.h ^1da177e4c3f41 include/asm-i386/uaccess.h Linus Torvalds 2005-04-16 11 beba3a20bf90ce arch/x86/include/asm/uaccess_32.h Al Viro 2017-03-25 12 unsigned long __must_check __copy_user_ll beba3a20bf90ce arch/x86/include/asm/uaccess_32.h Al Viro 2017-03-25 13 (void *to, const void *from, unsigned long n); b1fcec7f2296c4 include/asm-x86/uaccess_32.h Joe Perches 2008-03-23 14 unsigned long __must_check __copy_from_user_ll_nocache_nozero b1fcec7f2296c4 include/asm-x86/uaccess_32.h Joe Perches 2008-03-23 15 (void *to, const void __user *from, unsigned long n); ^1da177e4c3f41 include/asm-i386/uaccess.h Linus Torvalds 2005-04-16 16 652050aec936fd include/asm-i386/uaccess.h Ingo Molnar 2006-01-14 17 static __always_inline unsigned long __must_check beba3a20bf90ce arch/x86/include/asm/uaccess_32.h Al Viro 2017-03-25 @18 raw_copy_to_user(void __user *to, const void *from, unsigned long n) ^1da177e4c3f41 include/asm-i386/uaccess.h Linus Torvalds 2005-04-16 19 { beba3a20bf90ce arch/x86/include/asm/uaccess_32.h Al Viro 2017-03-25 20 return __copy_user_ll((__force void *)to, from, n); ^1da177e4c3f41 include/asm-i386/uaccess.h Linus Torvalds 2005-04-16 21 } ^1da177e4c3f41 include/asm-i386/uaccess.h Linus Torvalds 2005-04-16 22 7c12d81134b130 include/asm-i386/uaccess.h NeilBrown 2006-06-25 23 static __always_inline unsigned long beba3a20bf90ce arch/x86/include/asm/uaccess_32.h Al Viro 2017-03-25 @24 raw_copy_from_user(void *to, const void __user *from, unsigned long n) 7c12d81134b130 include/asm-i386/uaccess.h NeilBrown 2006-06-25 25 { beba3a20bf90ce arch/x86/include/asm/uaccess_32.h Al Viro 2017-03-25 26 return __copy_user_ll(to, (__force const void *)from, n); ^1da177e4c3f41 include/asm-i386/uaccess.h Linus Torvalds 2005-04-16 27 } ^1da177e4c3f41 include/asm-i386/uaccess.h Linus Torvalds 2005-04-16 28 652050aec936fd include/asm-i386/uaccess.h Ingo Molnar 2006-01-14 29 static __always_inline unsigned long b1fcec7f2296c4 include/asm-x86/uaccess_32.h Joe Perches 2008-03-23 @30 __copy_from_user_inatomic_nocache(void *to, const void __user *from, b1fcec7f2296c4 include/asm-x86/uaccess_32.h Joe Perches 2008-03-23 31 unsigned long n) ^1da177e4c3f41 include/asm-i386/uaccess.h Linus Torvalds 2005-04-16 32 { 7c12d81134b130 include/asm-i386/uaccess.h NeilBrown 2006-06-25 33 return __copy_from_user_ll_nocache_nozero(to, from, n); c22ce143d15eb2 include/asm-i386/uaccess.h Hiro Yoshioka 2006-06-23 34 } c22ce143d15eb2 include/asm-i386/uaccess.h Hiro Yoshioka 2006-06-23 35 :::::: The code at line 18 was first introduced by commit :::::: beba3a20bf90ce1b93e24592c3ebf0d0bb581bbe x86: switch to RAW_COPY_USER :::::: TO: Al Viro <viro(a)zeniv.linux.org.uk&gt; :::::: CC: Al Viro <viro(a)zeniv.linux.org.uk&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org