Hi chukaiping, Thank you for the patch! Yet something to improve: [auto build test ERROR on kees/for-next/pstore] [also build test ERROR on linus/master v5.12-rc7 next-20210412] [cannot apply to hnaz-linux-mm/master] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/chukaiping/mm-compaction-let-pro... base: https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/pstore config: powerpc-cell_defconfig (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 # https://github.com/0day-ci/linux/commit/a203321bf356e9514ca678c96119df72d... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review chukaiping/mm-compaction-let-proactive-compaction-order-configurable/20210412-172336 git checkout a203321bf356e9514ca678c96119df72d6bfa803 # 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 >>): In file included from arch/powerpc/include/asm/mmu.h:149, from arch/powerpc/include/asm/lppaca.h:46, from arch/powerpc/include/asm/paca.h:17, from arch/powerpc/include/asm/current.h:13, from include/linux/sched.h:12, from include/linux/ratelimit.h:6, from include/linux/dev_printk.h:16, from include/linux/device.h:15, from include/linux/node.h:18, from include/linux/cpu.h:17, from mm/compaction.c:11: 39 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | ^ mm/compaction.c:66:32: note: in expansion of macro 'HUGETLB_PAGE_ORDER' 66 | #define COMPACTION_HPAGE_ORDER HUGETLB_PAGE_ORDER | ^~~~~~~~~~~~~~~~~~ mm/compaction.c:2669:54: note: in expansion of macro 'COMPACTION_HPAGE_ORDER' 2669 | unsigned int __read_mostly sysctl_compaction_order = COMPACTION_HPAGE_ORDER; | ^~~~~~~~~~~~~~~~~~~~~~ vim +39 arch/powerpc/include/asm/page.h 5cd16ee934eafc include/asm-powerpc/page.h Michael Ellerman 2005-11-11 25 41151e77a4d96e arch/powerpc/include/asm/page.h Becky Bruce 2011-06-28 26 #ifndef __ASSEMBLY__ c5710cd2073503 arch/powerpc/include/asm/page.h Christophe Leroy 2019-04-26 27 #ifndef CONFIG_HUGETLB_PAGE 41151e77a4d96e arch/powerpc/include/asm/page.h Becky Bruce 2011-06-28 28 #define HPAGE_SHIFT PAGE_SHIFT c5710cd2073503 arch/powerpc/include/asm/page.h Christophe Leroy 2019-04-26 29 #elif defined(CONFIG_PPC_BOOK3S_64) c5710cd2073503 arch/powerpc/include/asm/page.h Christophe Leroy 2019-04-26 30 extern unsigned int hpage_shift; c5710cd2073503 arch/powerpc/include/asm/page.h Christophe Leroy 2019-04-26 31 #define HPAGE_SHIFT hpage_shift c5710cd2073503 arch/powerpc/include/asm/page.h Christophe Leroy 2019-04-26 32 #elif defined(CONFIG_PPC_8xx) c5710cd2073503 arch/powerpc/include/asm/page.h Christophe Leroy 2019-04-26 33 #define HPAGE_SHIFT 19 /* 512k pages */ c5710cd2073503 arch/powerpc/include/asm/page.h Christophe Leroy 2019-04-26 34 #elif defined(CONFIG_PPC_FSL_BOOK3E) c5710cd2073503 arch/powerpc/include/asm/page.h Christophe Leroy 2019-04-26 35 #define HPAGE_SHIFT 22 /* 4M pages */ 41151e77a4d96e arch/powerpc/include/asm/page.h Becky Bruce 2011-06-28 36 #endif 41151e77a4d96e arch/powerpc/include/asm/page.h Becky Bruce 2011-06-28 37 #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) 41151e77a4d96e arch/powerpc/include/asm/page.h Becky Bruce 2011-06-28 38 #define HPAGE_MASK (~(HPAGE_SIZE - 1)) 41151e77a4d96e arch/powerpc/include/asm/page.h Becky Bruce 2011-06-28 @39 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) 41151e77a4d96e arch/powerpc/include/asm/page.h Becky Bruce 2011-06-28 40 #define HUGE_MAX_HSTATE (MMU_PAGE_COUNT-1) 41151e77a4d96e arch/powerpc/include/asm/page.h Becky Bruce 2011-06-28 41 #endif 41151e77a4d96e arch/powerpc/include/asm/page.h Becky Bruce 2011-06-28 42 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org