tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   a6afa4199d3d038fbfdff5511f7523b0e30cb774
commit: 0a2b782a00f33e7d06dc43d099fa071ae97bee77 fortify: Make pointer arguments const
date:   8 months ago
config: powerpc-randconfig-s033-20221009
compiler: powerpc-linux-gcc (GCC) 12.1.0
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: v0.6.4-39-gce1a6720-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0a2b782a00f33e7d06dc43d099fa071ae97bee77
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 0a2b782a00f33e7d06dc43d099fa071ae97bee77
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 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 where applicable
| Reported-by: kernel test robot <lkp@intel.com>

sparse warnings: (new ones prefixed by >>)
>> arch/powerpc/platforms/powermac/nvram.c:304:24: 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: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@gmail.com>
:::::: CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>

-- 
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https://01.org/lkp