Hi Christophe, I love your patch! Yet something to improve: [auto build test ERROR on powerpc/next] [also build test ERROR on next-20210709] [cannot apply to v5.13] [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/Christophe-Leroy/powerpc-32s-Do-... base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next config: powerpc-randconfig-r032-20210709 (attached as .config) compiler: powerpc-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/8f55557e42a793db98e4e60b7c65d47a6... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Christophe-Leroy/powerpc-32s-Do-kuep_lock-and-kuep_unlock-in-assembly/20210709-155049 git checkout 8f55557e42a793db98e4e60b7c65d47a6c5a4b62 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross O=build_dir ARCH=powerpc SHELL=/bin/bash 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/kernel/entry_32.S: Assembler messages: arch/powerpc/kernel/entry_32.S:300: Error: unrecognized opcode: `update_user_segments_by_6' vim +110 arch/powerpc/kernel/entry_32.S 85 86 .globl transfer_to_syscall 87 transfer_to_syscall: 88 stw r11, GPR1(r1) 89 stw r11, 0(r1) 90 mflr r12 91 stw r12, _LINK(r1) 92 #if defined(CONFIG_BOOKE) || defined(CONFIG_40x) 93 rlwinm r9,r9,0,14,12 /* clear MSR_WE (necessary?) */ 94 #endif 95 lis r12,STACK_FRAME_REGS_MARKER@ha /* exception frame marker */ 96 SAVE_GPR(2, r1) 97 addi r12,r12,STACK_FRAME_REGS_MARKER@l 98 stw r9,_MSR(r1) 99 li r2, INTERRUPT_SYSCALL 100 stw r12,8(r1) 101 stw r2,_TRAP(r1) 102 SAVE_GPR(0, r1) 103 SAVE_4GPRS(3, r1) 104 SAVE_2GPRS(7, r1) 105 addi r2,r10,-THREAD 106 #ifdef CONFIG_PPC_KUEP 107 mfsr r9,0 108 rlwinm r9,r9,0,8,3 109 oris r9,r9,SR_NX@h 111 #endif 112 SAVE_NVGPRS(r1) 113 114 /* Calling convention has r9 = orig r0, r10 = regs */ 115 addi r10,r1,STACK_FRAME_OVERHEAD 116 mr r9,r0 117 bl system_call_exception 118 119 ret_from_syscall: 120 addi r4,r1,STACK_FRAME_OVERHEAD 121 li r5,0 122 bl syscall_exit_prepare 123 #ifdef CONFIG_PPC_47x 124 lis r4,icache_44x_need_flush@ha 125 lwz r5,icache_44x_need_flush@l(r4) 126 cmplwi cr0,r5,0 127 bne- 2f 128 #endif /* CONFIG_PPC_47x */ 129 #ifdef CONFIG_PPC_KUEP 130 mfsr r7,0 131 rlwinm r7,r7,0,8,2 133 #endif 134 lwz r4,_LINK(r1) 135 lwz r5,_CCR(r1) 136 mtlr r4 137 lwz r7,_NIP(r1) 138 lwz r8,_MSR(r1) 139 cmpwi r3,0 140 lwz r3,GPR3(r1) 141 syscall_exit_finish: 142 mtspr SPRN_SRR0,r7 143 mtspr SPRN_SRR1,r8 144 145 bne 3f 146 mtcr r5 147 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org