Hi Leonardo, Thank you for the patch! Yet something to improve: [auto build test ERROR on powerpc/next] [also build test ERROR on asm-generic/master paulus-powerpc/kvm-ppc-next linus/master v5.5 next-20200207] [cannot apply to kvm-ppc/kvm-ppc-next] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Leonardo-Bras/Introduces-new-functions-for-tracking-lockless-pagetable-walks/20200207-071035 base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next config: xtensa-common_defconfig (attached as .config) compiler: xtensa-linux-gcc (GCC) 7.5.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=7.5.0 make.cross ARCH=xtensa If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): include/asm-generic/pgtable.h: Assembler messages: include/asm-generic/pgtable.h:1230: Error: unknown opcode or format name 'static' include/asm-generic/pgtable.h:1231: Error: unknown opcode or format name 'unsigned' include/asm-generic/pgtable.h:1233: Error: unknown opcode or format name 'unsigned' include/asm-generic/pgtable.h:1240: Error: unknown opcode or format name 'local_irq_save' include/asm-generic/pgtable.h:1248: Error: unknown opcode or format name 'smp_mb' include/asm-generic/pgtable.h:1250: Error: unknown opcode or format name 'return' >> include/asm-generic/pgtable.h:1251: Error: couldn't find a valid instruction format ops were: include/asm-generic/pgtable.h:1257: Error: unknown opcode or format name 'static' include/asm-generic/pgtable.h:1265: Error: unknown opcode or format name 'smp_mb' include/asm-generic/pgtable.h:1272: Error: unknown opcode or format name 'local_irq_restore' include/asm-generic/pgtable.h:1273: Error: couldn't find a valid instruction format ops were: vim +1251 include/asm-generic/pgtable.h 1224 1225 #ifndef __HAVE_ARCH_LOCKLESS_PGTBL_WALK_CONTROL 1226 /* 1227 * begin_lockless_pgtbl_walk: Must be inserted before a function call that does 1228 * lockless pagetable walks, such as __find_linux_pte() 1229 */ 1230 static inline 1231 unsigned long begin_lockless_pgtbl_walk(void) 1232 { 1233 unsigned long irq_mask; 1234 1235 /* 1236 * Interrupts must be disabled during the lockless page table walk. 1237 * That's because the deleting or splitting involves flushing TLBs, 1238 * which in turn issues interrupts, that will block when disabled. 1239 */ 1240 local_irq_save(irq_mask); 1241 1242 /* 1243 * This memory barrier pairs with any code that is either trying to 1244 * delete page tables, or split huge pages. Without this barrier, 1245 * the page tables could be read speculatively outside of interrupt 1246 * disabling. 1247 */ 1248 smp_mb(); 1249 1250 return irq_mask; > 1251 } 1252 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx Intel Corporation
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