tree: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next-test head: 0fbd1eb4df96e1cbd039e0b95fdf62cf65a7faf9 commit: ed411c66eea2ccf93a634ae661a1f79c2bc63d88 [125/127] powerpc/book3s64/pkeys: Remove is_pkey_enabled() config: powerpc-allmodconfig (attached as .config) compiler: powerpc64-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout ed411c66eea2ccf93a634ae661a1f79c2bc63d88 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc 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 >>): arch/powerpc/mm/book3s64/pkeys.c: In function 'pkey_access_permitted': 392 | if (!is_pkey_enabled(pkey)) | ^~~~~~~~~~~~~~~ | arch_pkeys_enabled cc1: some warnings being treated as errors vim +392 arch/powerpc/mm/book3s64/pkeys.c f2407ef3ba2256 arch/powerpc/mm/pkeys.c Ram Pai 2018-01-18 386 f2407ef3ba2256 arch/powerpc/mm/pkeys.c Ram Pai 2018-01-18 387 static bool pkey_access_permitted(int pkey, bool write, bool execute) f2407ef3ba2256 arch/powerpc/mm/pkeys.c Ram Pai 2018-01-18 388 { f2407ef3ba2256 arch/powerpc/mm/pkeys.c Ram Pai 2018-01-18 389 int pkey_shift; f2407ef3ba2256 arch/powerpc/mm/pkeys.c Ram Pai 2018-01-18 390 u64 amr; f2407ef3ba2256 arch/powerpc/mm/pkeys.c Ram Pai 2018-01-18 391 f2407ef3ba2256 arch/powerpc/mm/pkeys.c Ram Pai 2018-01-18 @392 if (!is_pkey_enabled(pkey)) f2407ef3ba2256 arch/powerpc/mm/pkeys.c Ram Pai 2018-01-18 393 return true; f2407ef3ba2256 arch/powerpc/mm/pkeys.c Ram Pai 2018-01-18 394 f2407ef3ba2256 arch/powerpc/mm/pkeys.c Ram Pai 2018-01-18 395 pkey_shift = pkeyshift(pkey); f2407ef3ba2256 arch/powerpc/mm/pkeys.c Ram Pai 2018-01-18 396 if (execute && !(read_iamr() & (IAMR_EX_BIT << pkey_shift))) f2407ef3ba2256 arch/powerpc/mm/pkeys.c Ram Pai 2018-01-18 397 return true; f2407ef3ba2256 arch/powerpc/mm/pkeys.c Ram Pai 2018-01-18 398 f2407ef3ba2256 arch/powerpc/mm/pkeys.c Ram Pai 2018-01-18 399 amr = read_amr(); /* Delay reading amr until absolutely needed */ f2407ef3ba2256 arch/powerpc/mm/pkeys.c Ram Pai 2018-01-18 400 return ((!write && !(amr & (AMR_RD_BIT << pkey_shift))) || f2407ef3ba2256 arch/powerpc/mm/pkeys.c Ram Pai 2018-01-18 401 (write && !(amr & (AMR_WR_BIT << pkey_shift)))); f2407ef3ba2256 arch/powerpc/mm/pkeys.c Ram Pai 2018-01-18 402 } f2407ef3ba2256 arch/powerpc/mm/pkeys.c Ram Pai 2018-01-18 403 :::::: The code at line 392 was first introduced by commit :::::: f2407ef3ba225665ee24965f69bc84435fb590cf powerpc: helper to validate key-access permissions of a pte :::::: TO: Ram Pai <linuxram(a)us.ibm.com&gt; :::::: CC: Michael Ellerman <mpe(a)ellerman.id.au&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org