tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 395a61741f7ea29e1f4a0d6e160197fe8e377572 commit: 4cfbda15d6578759c0157b18698e0c10ba598856 [3267/4901] fortify: Add Clang support config: powerpc-allmodconfig (https://download.01.org/0day-ci/archive/20220211/202202110552.DxobMxL7-lk...) compiler: powerpc-linux-gcc (GCC) 11.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 4cfbda15d6578759c0157b18698e0c10ba598856 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=powerpc SHELL=/bin/bash arch/powerpc/platforms/powermac/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) arch/powerpc/platforms/powermac/nvram.c:304:24: sparse: expected void const *const p arch/powerpc/platforms/powermac/nvram.c:304:24: sparse: got unsigned char [noderef] [usertype] __iomem *base arch/powerpc/platforms/powermac/nvram.c:338:20: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const *const p @@ got unsigned char [noderef] [usertype] __iomem *base @@ arch/powerpc/platforms/powermac/nvram.c:338:20: sparse: expected void const *const p arch/powerpc/platforms/powermac/nvram.c:338:20: sparse: got unsigned char [noderef] [usertype] __iomem *base arch/powerpc/platforms/powermac/nvram.c:384:24: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const *const p @@ got unsigned char [noderef] [usertype] __iomem *base @@ arch/powerpc/platforms/powermac/nvram.c:384:24: sparse: expected void const *const p arch/powerpc/platforms/powermac/nvram.c:384:24: sparse: got unsigned char [noderef] [usertype] __iomem *base arch/powerpc/platforms/powermac/nvram.c:429:20: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const *const p @@ got unsigned char [noderef] [usertype] __iomem *base @@ arch/powerpc/platforms/powermac/nvram.c:429:20: sparse: expected void const *const p arch/powerpc/platforms/powermac/nvram.c:429:20: sparse: got unsigned char [noderef] [usertype] __iomem *base arch/powerpc/platforms/powermac/nvram.c:480:35: sparse: sparse: cast removes address space '__iomem' of expression arch/powerpc/platforms/powermac/nvram.c:526:35: sparse: sparse: cast removes address space '__iomem' of expression arch/powerpc/platforms/powermac/nvram.c:527:35: sparse: sparse: cast removes address space '__iomem' of expression arch/powerpc/platforms/powermac/nvram.c:534:44: sparse: sparse: dereference of noderef expression vim +304 arch/powerpc/platforms/powermac/nvram.c 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 279 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 280 static int sm_erase_bank(int bank) 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 281 { 2d4b971287cbce arch/powerpc/platforms/powermac/nvram.c Akinobu Mita 2012-01-27 282 int stat; 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 283 unsigned long timeout; 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 284 af308377e204e2 arch/powerpc/platforms/powermac/nvram.c Stephen Rothwell 2006-03-23 285 u8 __iomem *base = (u8 __iomem *)nvram_data + core99_bank*NVRAM_SIZE; 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 286 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 287 DBG("nvram: Sharp/Micron Erasing bank %d...\n", bank); 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 288 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 289 out_8(base, SM_FLASH_CMD_ERASE_SETUP); 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 290 out_8(base, SM_FLASH_CMD_ERASE_CONFIRM); 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 291 timeout = 0; 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 292 do { 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 293 if (++timeout > 1000000) { 35499c0195e46f arch/powerpc/platforms/powermac/nvram.c Paul Mackerras 2005-10-22 294 printk(KERN_ERR "nvram: Sharp/Micron flash erase timeout !\n"); 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 295 break; 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 296 } 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 297 out_8(base, SM_FLASH_CMD_READ_STATUS); 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 298 stat = in_8(base); 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 299 } while (!(stat & SM_FLASH_STATUS_DONE)); 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 300 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 301 out_8(base, SM_FLASH_CMD_CLEAR_STATUS); 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 302 out_8(base, SM_FLASH_CMD_RESET); 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 303 2d4b971287cbce arch/powerpc/platforms/powermac/nvram.c Akinobu Mita 2012-01-27 @304 if (memchr_inv(base, 0xff, NVRAM_SIZE)) { 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 305 printk(KERN_ERR "nvram: Sharp/Micron flash erase failed !\n"); 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 306 return -ENXIO; 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 307 } 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 308 return 0; 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 309 } 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_nvram.c Paul Mackerras 2005-09-26 310 :::::: The code at line 304 was first introduced by commit :::::: 2d4b971287cbce16585acda4b76308faa8da0950 powerpc/pmac: Use string library in nvram code :::::: TO: Akinobu Mita <akinobu.mita(a)gmail.com&gt; :::::: CC: Benjamin Herrenschmidt <benh(a)kernel.crashing.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org