Hi Ravi, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on powerpc/next] [also build test WARNING on v5.9 next-20201016] [cannot apply to mpe/next scottwood/next] [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/Ravi-Bangoria/powerpc-Introduce-... base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next 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 # https://github.com/0day-ci/linux/commit/a873a50e35b4c881b6bb53f48ae8ef7bb... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Ravi-Bangoria/powerpc-Introduce-POWER10_DD1-feature/20201020-134813 git checkout a873a50e35b4c881b6bb53f48ae8ef7bb3e576eb # 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 warnings (new ones prefixed by >>): arch/powerpc/kernel/hw_breakpoint.c: In function 'handle_p10dd1_spurious_exception': 561 | unsigned long hw_start_addr; | ^~~~~~~~~~~~~ vim +/hw_start_addr +561 arch/powerpc/kernel/hw_breakpoint.c 556 557 static void handle_p10dd1_spurious_exception(struct arch_hw_breakpoint **info, 558 int *hit, unsigned long ea) 559 { 560 int i; 562 unsigned long hw_end_addr; 563 564 /* 565 * Handle spurious exception only when any bp_per_reg is set. 566 * Otherwise this might be created by xmon and not actually a 567 * spurious exception. 568 */ 569 for (i = 0; i < nr_wp_slots(); i++) { 570 if (!info[i]) 571 continue; 572 573 hw_start_addr = ALIGN_DOWN(info[i]->address, HW_BREAKPOINT_SIZE); 574 hw_end_addr = ALIGN(info[i]->address + info[i]->len, HW_BREAKPOINT_SIZE); 575 576 /* 577 * Ending address of DAWR range is less than starting 578 * address of op. 579 */ 580 if ((hw_end_addr - 1) >= ea) 581 continue; 582 583 /* 584 * Those addresses need to be in the same or in two 585 * consecutive 512B blocks; 586 */ 587 if (((hw_end_addr - 1) >> 10) != (ea >> 10)) 588 continue; 589 590 /* 591 * 'op address + 64B' generates an address that has a 592 * carry into bit 52 (crosses 2K boundary). 593 */ 594 if ((ea & 0x800) == ((ea + 64) & 0x800)) 595 continue; 596 597 break; 598 } 599 600 if (i == nr_wp_slots()) 601 return; 602 603 for (i = 0; i < nr_wp_slots(); i++) { 604 if (info[i]) { 605 hit[i] = 1; 606 info[i]->type |= HW_BRK_TYPE_EXTRANEOUS_IRQ; 607 } 608 } 609 } 610 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org