tree: https://git.kernel.org/pub/scm/linux/kernel/git/mips/linux.git mips-next head: d41afc398fbc9dfb8c40b951e97a7f0283346c6a commit: 95b1f6db67aea9135b018497f7ed4446a060cba2 [41/54] MIPS: cpu-probe: Set Ingenic's writecombine to _CACHE_CACHABLE_WA config: mips-jmr3927_defconfig (attached as .config) compiler: mips-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 95b1f6db67aea9135b018497f7ed4446a060cba2 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 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/mips/include/asm/io.h:30, from arch/mips/include/asm/mmiowb.h:5, from include/linux/spinlock.h:61, from include/linux/wait.h:9, from include/linux/pid.h:6, from include/linux/sched.h:14, from include/linux/ptrace.h:6, from arch/mips/kernel/cpu-probe.c:12: arch/mips/kernel/cpu-probe.c: In function 'cpu_probe_ingenic': 258 | #define _CACHE_CACHABLE_WA (1<<_CACHE_SHIFT) | ^~~~~~~~~~~~ arch/mips/kernel/cpu-probe.c:2173:21: note: in expansion of macro '_CACHE_CACHABLE_WA' 2173 | c->writecombine = _CACHE_CACHABLE_WA; | ^~~~~~~~~~~~~~~~~~ arch/mips/include/asm/pgtable-bits.h:258:33: note: each undeclared identifier is reported only once for each function it appears in 258 | #define _CACHE_CACHABLE_WA (1<<_CACHE_SHIFT) | ^~~~~~~~~~~~ arch/mips/kernel/cpu-probe.c:2173:21: note: in expansion of macro '_CACHE_CACHABLE_WA' 2173 | c->writecombine = _CACHE_CACHABLE_WA; | ^~~~~~~~~~~~~~~~~~ # https://git.kernel.org/pub/scm/linux/kernel/git/mips/linux.git/commit/?id... git remote add mips-linux https://git.kernel.org/pub/scm/linux/kernel/git/mips/linux.git git fetch --no-tags mips-linux mips-next git checkout 95b1f6db67aea9135b018497f7ed4446a060cba2 vim +258 arch/mips/include/asm/pgtable-bits.h ^1da177e4c3f41 include/asm-mips/pgtable-bits.h Linus Torvalds 2005-04-16 253 fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 254 #ifndef _CACHE_CACHABLE_NO_WA fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 255 #define _CACHE_CACHABLE_NO_WA (0<<_CACHE_SHIFT) fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 256 #endif fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 257 #ifndef _CACHE_CACHABLE_WA fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 @258 #define _CACHE_CACHABLE_WA (1<<_CACHE_SHIFT) fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 259 #endif fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 260 #ifndef _CACHE_UNCACHED fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 261 #define _CACHE_UNCACHED (2<<_CACHE_SHIFT) fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 262 #endif fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 263 #ifndef _CACHE_CACHABLE_NONCOHERENT fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 264 #define _CACHE_CACHABLE_NONCOHERENT (3<<_CACHE_SHIFT) fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 265 #endif fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 266 #ifndef _CACHE_CACHABLE_CE fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 267 #define _CACHE_CACHABLE_CE (4<<_CACHE_SHIFT) fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 268 #endif fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 269 #ifndef _CACHE_CACHABLE_COW fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 270 #define _CACHE_CACHABLE_COW (5<<_CACHE_SHIFT) fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 271 #endif fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 272 #ifndef _CACHE_CACHABLE_CUW fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 273 #define _CACHE_CACHABLE_CUW (6<<_CACHE_SHIFT) fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 274 #endif fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 275 #ifndef _CACHE_UNCACHED_ACCELERATED fb02035083d9e2 arch/mips/include/asm/pgtable-bits.h Markos Chandras 2014-07-18 276 #define _CACHE_UNCACHED_ACCELERATED (7<<_CACHE_SHIFT) ^1da177e4c3f41 include/asm-mips/pgtable-bits.h Linus Torvalds 2005-04-16 277 #endif ^1da177e4c3f41 include/asm-mips/pgtable-bits.h Linus Torvalds 2005-04-16 278 :::::: The code at line 258 was first introduced by commit :::::: fb02035083d9e2de1deba529b45835a698944f07 MIPS: pgtable-bits: Move the CCA bits out of the core's ifdef blocks :::::: TO: Markos Chandras <markos.chandras(a)imgtec.com&gt; :::::: CC: Ralf Baechle <ralf(a)linux-mips.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org