tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 06a81c1c7db9bd5de0bd38cd5acc44bb22b99150 commit: 214d9bbcd3a67230b932f6cea83c078ab34d9e70 s390/mm: provide memory management functions for protected KVM guests date: 5 months ago config: s390-randconfig-s032-20200809 (attached as .config) compiler: s390-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.2-118-ge1578773-dirty git checkout 214d9bbcd3a67230b932f6cea83c078ab34d9e70 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) arch/s390/kernel/uv.c: note: in included file (through include/linux/memblock.h): vim +/gmap_make_secure +1734 include/linux/mm.h d08b3851da41d0e Peter Zijlstra 2006-09-25 1731 25ca1d6c02fe1c6 Namhyung Kim 2010-10-26 1732 extern pte_t *__get_locked_pte(struct mm_struct *mm, unsigned long addr, 25ca1d6c02fe1c6 Namhyung Kim 2010-10-26 1733 spinlock_t **ptl); 25ca1d6c02fe1c6 Namhyung Kim 2010-10-26 @1734 static inline pte_t *get_locked_pte(struct mm_struct *mm, unsigned long addr, 25ca1d6c02fe1c6 Namhyung Kim 2010-10-26 1735 spinlock_t **ptl) 25ca1d6c02fe1c6 Namhyung Kim 2010-10-26 1736 { 25ca1d6c02fe1c6 Namhyung Kim 2010-10-26 1737 pte_t *ptep; 25ca1d6c02fe1c6 Namhyung Kim 2010-10-26 1738 __cond_lock(*ptl, ptep = __get_locked_pte(mm, addr, ptl)); 25ca1d6c02fe1c6 Namhyung Kim 2010-10-26 1739 return ptep; 25ca1d6c02fe1c6 Namhyung Kim 2010-10-26 1740 } c9cfcddfd657354 Linus Torvalds 2005-11-29 1741 :::::: The code at line 1734 was first introduced by commit :::::: 25ca1d6c02fe1c6d90d918867ef670d323725458 mm: wrap get_locked_pte() using __cond_lock() :::::: TO: Namhyung Kim <namhyung(a)gmail.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