tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: b3a9e3b9622ae10064826dccb4f7a52bd88c7407 commit: 80591e61a0f7e88deaada69844e4a31280c4a38f kbuild: tell sparse about the $ARCH date: 7 months ago config: nios2-randconfig-s032-20200615 (attached as .config) compiler: nios2-linux-gcc (GCC) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.2-rc1-3-g55607964-dirty git checkout 80591e61a0f7e88deaada69844e4a31280c4a38f # save the attached .config to linux build tree make W=1 C=1 ARCH=nios2 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' 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 >>) -- vim +/move_pages_to_lru +12 arch/nios2/include/asm/irqflags.h f27ffc751ca5d2 Ley Foon Tan 2014-11-06 9 f27ffc751ca5d2 Ley Foon Tan 2014-11-06 10 static inline unsigned long arch_local_save_flags(void) f27ffc751ca5d2 Ley Foon Tan 2014-11-06 11 { f27ffc751ca5d2 Ley Foon Tan 2014-11-06 @12 return RDCTL(CTL_STATUS); f27ffc751ca5d2 Ley Foon Tan 2014-11-06 13 } f27ffc751ca5d2 Ley Foon Tan 2014-11-06 14 :::::: The code at line 12 was first introduced by commit :::::: f27ffc751ca5d216a347084996c70452a4e185a4 nios2: Interrupt handling :::::: TO: Ley Foon Tan <lftan(a)altera.com&gt; :::::: CC: Ley Foon Tan <lftan(a)altera.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org