tree: https://github.com/linuxppc/linux merge-test head: 5051da4e992d7b08169e728405032fba385a4629 commit: 12d381add7ef275932b24cc3475c01864d17568a [663/669] Automatic merge of 'master' into merge (2020-10-17 21:12) config: powerpc64-randconfig-r035-20201019 (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/linuxppc/linux/commit/12d381add7ef275932b24cc3475c0186... git remote add linuxppc https://github.com/linuxppc/linux git fetch --no-tags linuxppc merge-test git checkout 12d381add7ef275932b24cc3475c01864d17568a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc64 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/mm/kasan/kasan_init_32.c: In function 'kasan_init': 143 | int ret; | ^~~ arch/powerpc/mm/kasan/kasan_init_32.c:141:6: note: previous declaration of 'ret' was here 141 | int ret; | ^~~ vim +/ret +143 arch/powerpc/mm/kasan/kasan_init_32.c 41ea93cf7ba4e0 Christophe Leroy 2020-07-02 137 41ea93cf7ba4e0 Christophe Leroy 2020-07-02 138 void __init kasan_init(void) 41ea93cf7ba4e0 Christophe Leroy 2020-07-02 139 { b10d6bca87204c Mike Rapoport 2020-10-13 140 phys_addr_t base, end; 4c42dc5c69a8f2 Christophe Leroy 2020-09-11 141 int ret; b10d6bca87204c Mike Rapoport 2020-10-13 142 u64 i; 4c42dc5c69a8f2 Christophe Leroy 2020-09-11 @143 int ret; 2edb16efc899f9 Christophe Leroy 2019-04-26 144 b10d6bca87204c Mike Rapoport 2020-10-13 145 for_each_mem_range(i, &base, &end) { b10d6bca87204c Mike Rapoport 2020-10-13 146 phys_addr_t top = min(end, total_lowmem); 2edb16efc899f9 Christophe Leroy 2019-04-26 147 2edb16efc899f9 Christophe Leroy 2019-04-26 148 if (base >= top) 2edb16efc899f9 Christophe Leroy 2019-04-26 149 continue; 2edb16efc899f9 Christophe Leroy 2019-04-26 150 2edb16efc899f9 Christophe Leroy 2019-04-26 151 ret = kasan_init_region(__va(base), top - base); 2edb16efc899f9 Christophe Leroy 2019-04-26 152 if (ret) 2edb16efc899f9 Christophe Leroy 2019-04-26 153 panic("kasan: kasan_init_region() failed"); 2edb16efc899f9 Christophe Leroy 2019-04-26 154 } ec97d022f621c6 Christophe Leroy 2020-05-19 155 4c42dc5c69a8f2 Christophe Leroy 2020-09-11 156 if (IS_ENABLED(CONFIG_KASAN_VMALLOC)) { 4c42dc5c69a8f2 Christophe Leroy 2020-09-11 157 ret = kasan_init_shadow_page_tables(KASAN_SHADOW_START, KASAN_SHADOW_END); 4c42dc5c69a8f2 Christophe Leroy 2020-09-11 158 4c42dc5c69a8f2 Christophe Leroy 2020-09-11 159 if (ret) 4c42dc5c69a8f2 Christophe Leroy 2020-09-11 160 panic("kasan: kasan_init_shadow_page_tables() failed"); 4c42dc5c69a8f2 Christophe Leroy 2020-09-11 161 } 4c42dc5c69a8f2 Christophe Leroy 2020-09-11 162 2edb16efc899f9 Christophe Leroy 2019-04-26 163 kasan_remap_early_shadow_ro(); 2edb16efc899f9 Christophe Leroy 2019-04-26 164 2edb16efc899f9 Christophe Leroy 2019-04-26 165 clear_page(kasan_early_shadow_page); 2edb16efc899f9 Christophe Leroy 2019-04-26 166 2edb16efc899f9 Christophe Leroy 2019-04-26 167 /* At this point kasan is fully initialized. Enable error messages */ 2edb16efc899f9 Christophe Leroy 2019-04-26 168 init_task.kasan_depth = 0; 2edb16efc899f9 Christophe Leroy 2019-04-26 169 pr_info("KASAN init done\n"); 2edb16efc899f9 Christophe Leroy 2019-04-26 170 } 2edb16efc899f9 Christophe Leroy 2019-04-26 171 :::::: The code at line 143 was first introduced by commit :::::: 4c42dc5c69a8f24c467a6c997909d2f1d4efdc7f powerpc/kasan: Fix CONFIG_KASAN_VMALLOC for 8xx :::::: TO: Christophe Leroy <christophe.leroy(a)csgroup.eu&gt; :::::: CC: Michael Ellerman <mpe(a)ellerman.id.au&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org