Subject: [powerpc:next-test 42/193] arch/powerpc/platforms/44x/ppc476.c:241:34: sparse: sparse: incorrect type in argument 1 (different address spaces)

From: kernel test robot <[email-masked]>
Date: Mon, 7 Dec 2020 14:38:09 +0800

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next-test
head:   8817aabb1bdd5811130f94ff6442bb19c9158a3a
commit: 894fa235eb4ca0bfa692dbe4932c2f940cdc8c1e [42/193] powerpc: inline iomap accessors
config: powerpc64-randconfig-s032-20201207 (attached as .config)
compiler: powerpc-linux-gcc (GCC) 9.3.0
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: v0.6.3-179-ga00755aa-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id=894fa235eb4ca0bfa692dbe4932c2f940cdc8c1e
        git remote add powerpc https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git
        git fetch --no-tags powerpc next-test
        git checkout 894fa235eb4ca0bfa692dbe4932c2f940cdc8c1e
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=powerpc64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <[email-masked]>

"sparse warnings: (new ones prefixed by >>)"
   arch/powerpc/platforms/44x/ppc476.c:236:17: sparse: sparse: cast removes address space '__iomem' of expression
>> arch/powerpc/platforms/44x/ppc476.c:241:34: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const volatile [noderef] __iomem *addr @@     got unsigned char [usertype] * @@
   arch/powerpc/platforms/44x/ppc476.c:241:34: sparse:     expected void const volatile [noderef] __iomem *addr
   arch/powerpc/platforms/44x/ppc476.c:241:34: sparse:     got unsigned char [usertype] *
   arch/powerpc/platforms/44x/ppc476.c:243:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got unsigned char [usertype] *[assigned] fpga @@
   arch/powerpc/platforms/44x/ppc476.c:243:17: sparse:     expected void volatile [noderef] __iomem *addr
   arch/powerpc/platforms/44x/ppc476.c:243:17: sparse:     got unsigned char [usertype] *[assigned] fpga

vim +241 arch/powerpc/platforms/44x/ppc476.c

228d55053397e6d arch/powerpc/platforms/44x/currituck.c Tony Breeds     2011-11-30  217  
ab9a4183fddf232 arch/powerpc/platforms/44x/currituck.c Alistair Popple 2013-05-09  218  static int board_rev = -1;
ab9a4183fddf232 arch/powerpc/platforms/44x/currituck.c Alistair Popple 2013-05-09  219  static int __init ppc47x_get_board_rev(void)
ab9a4183fddf232 arch/powerpc/platforms/44x/currituck.c Alistair Popple 2013-05-09  220  {
2a2c74b2efcb1a0 arch/powerpc/platforms/44x/ppc476.c    Alistair Popple 2014-03-06  221  	int reg;
2a2c74b2efcb1a0 arch/powerpc/platforms/44x/ppc476.c    Alistair Popple 2014-03-06  222  	u8 *fpga;
2a2c74b2efcb1a0 arch/powerpc/platforms/44x/ppc476.c    Alistair Popple 2014-03-06  223  	struct device_node *np = NULL;
ab9a4183fddf232 arch/powerpc/platforms/44x/currituck.c Alistair Popple 2013-05-09  224  
2a2c74b2efcb1a0 arch/powerpc/platforms/44x/ppc476.c    Alistair Popple 2014-03-06  225  	if (of_machine_is_compatible("ibm,currituck")) {
ab9a4183fddf232 arch/powerpc/platforms/44x/currituck.c Alistair Popple 2013-05-09  226  		np = of_find_compatible_node(NULL, NULL, "ibm,currituck-fpga");
2a2c74b2efcb1a0 arch/powerpc/platforms/44x/ppc476.c    Alistair Popple 2014-03-06  227  		reg = 0;
2a2c74b2efcb1a0 arch/powerpc/platforms/44x/ppc476.c    Alistair Popple 2014-03-06  228  	} else if (of_machine_is_compatible("ibm,akebono")) {
2a2c74b2efcb1a0 arch/powerpc/platforms/44x/ppc476.c    Alistair Popple 2014-03-06  229  		np = of_find_compatible_node(NULL, NULL, "ibm,akebono-fpga");
2a2c74b2efcb1a0 arch/powerpc/platforms/44x/ppc476.c    Alistair Popple 2014-03-06  230  		reg = 2;
2a2c74b2efcb1a0 arch/powerpc/platforms/44x/ppc476.c    Alistair Popple 2014-03-06  231  	}
2a2c74b2efcb1a0 arch/powerpc/platforms/44x/ppc476.c    Alistair Popple 2014-03-06  232  
ab9a4183fddf232 arch/powerpc/platforms/44x/currituck.c Alistair Popple 2013-05-09  233  	if (!np)
ab9a4183fddf232 arch/powerpc/platforms/44x/currituck.c Alistair Popple 2013-05-09  234  		goto fail;
ab9a4183fddf232 arch/powerpc/platforms/44x/currituck.c Alistair Popple 2013-05-09  235  
2a2c74b2efcb1a0 arch/powerpc/platforms/44x/ppc476.c    Alistair Popple 2014-03-06 @236  	fpga = (u8 *) of_iomap(np, 0);
ab9a4183fddf232 arch/powerpc/platforms/44x/currituck.c Alistair Popple 2013-05-09  237  	of_node_put(np);
ab9a4183fddf232 arch/powerpc/platforms/44x/currituck.c Alistair Popple 2013-05-09  238  	if (!fpga)
ab9a4183fddf232 arch/powerpc/platforms/44x/currituck.c Alistair Popple 2013-05-09  239  		goto fail;
ab9a4183fddf232 arch/powerpc/platforms/44x/currituck.c Alistair Popple 2013-05-09  240  
2a2c74b2efcb1a0 arch/powerpc/platforms/44x/ppc476.c    Alistair Popple 2014-03-06 @241  	board_rev = ioread8(fpga + reg) & 0x03;
ab9a4183fddf232 arch/powerpc/platforms/44x/currituck.c Alistair Popple 2013-05-09  242  	pr_info("%s: Found board revision %d\n", __func__, board_rev);
ab9a4183fddf232 arch/powerpc/platforms/44x/currituck.c Alistair Popple 2013-05-09  243  	iounmap(fpga);
ab9a4183fddf232 arch/powerpc/platforms/44x/currituck.c Alistair Popple 2013-05-09  244  	return 0;
ab9a4183fddf232 arch/powerpc/platforms/44x/currituck.c Alistair Popple 2013-05-09  245  
ab9a4183fddf232 arch/powerpc/platforms/44x/currituck.c Alistair Popple 2013-05-09  246  fail:
ab9a4183fddf232 arch/powerpc/platforms/44x/currituck.c Alistair Popple 2013-05-09  247  	pr_info("%s: Unable to find board revision\n", __func__);
ab9a4183fddf232 arch/powerpc/platforms/44x/currituck.c Alistair Popple 2013-05-09  248  	return 0;
ab9a4183fddf232 arch/powerpc/platforms/44x/currituck.c Alistair Popple 2013-05-09  249  }
ab9a4183fddf232 arch/powerpc/platforms/44x/currituck.c Alistair Popple 2013-05-09  250  machine_arch_initcall(ppc47x, ppc47x_get_board_rev);
ab9a4183fddf232 arch/powerpc/platforms/44x/currituck.c Alistair Popple 2013-05-09  251  

:::::: The code at line 241 was first introduced by commit
:::::: 2a2c74b2efcb1a0ca3fdcb5fbb96ad8de6a29177 IBM Akebono: Add the Akebono platform

:::::: TO: Alistair Popple <[email-masked]>
:::::: CC: Benjamin Herrenschmidt <[email-masked]>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/[email-masked]