drivers/watchdog/bcm63xx_wdt.c:147:37: sparse: sparse: incorrect type in initializer (different address spaces)

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   4357f03d6611753936e4d52fc251b54a6afb1b54
commit: ddb002d6d6af12c45dd9d565cadf0f40b36b7c25 MIPS: uaccess: Reduce number of nested macros
date:   5 months ago
config: mips-randconfig-s031-20210918 (attached as .config)
compiler: mips-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/torvalds/linux.git/commit/?id=ddb002d6d6af12c45dd9d565cadf0f40b36b7c25
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout ddb002d6d6af12c45dd9d565cadf0f40b36b7c25
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=mips 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>


sparse warnings: (new ones prefixed by >>)
   command-line: note: in included file:
   builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_ACQUIRE redefined
   builtin:0:0: sparse: this was the original definition
   builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_SEQ_CST redefined
   builtin:0:0: sparse: this was the original definition
   builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_ACQ_REL redefined
   builtin:0:0: sparse: this was the original definition
   builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_RELEASE redefined
   builtin:0:0: sparse: this was the original definition
   drivers/watchdog/bcm63xx_wdt.c:59:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/watchdog/bcm63xx_wdt.c:60:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/watchdog/bcm63xx_wdt.c:61:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/watchdog/bcm63xx_wdt.c:66:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/watchdog/bcm63xx_wdt.c:67:9: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/watchdog/bcm63xx_wdt.c:94:28: sparse: sparse: Using plain integer as NULL pointer
>> drivers/watchdog/bcm63xx_wdt.c:147:37: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected char const [noderef] __user *__p @@     got char const * @@
   drivers/watchdog/bcm63xx_wdt.c:147:37: sparse:     expected char const [noderef] __user *__p
   drivers/watchdog/bcm63xx_wdt.c:147:37: sparse:     got char const *
   drivers/watchdog/bcm63xx_wdt.c:222:27: sparse: sparse: incorrect type in initializer (incompatible argument 2 (different address spaces)) @@     expected int ( *write )( ... ) @@     got int ( * )( ... ) @@
   drivers/watchdog/bcm63xx_wdt.c:222:27: sparse:     expected int ( *write )( ... )
   drivers/watchdog/bcm63xx_wdt.c:222:27: sparse:     got int ( * )( ... )

vim +147 drivers/watchdog/bcm63xx_wdt.c

b63aa731cd9e3f Florian Fainelli 2010-08-28  134  
b63aa731cd9e3f Florian Fainelli 2010-08-28  135  static ssize_t bcm63xx_wdt_write(struct file *file, const char *data,
b63aa731cd9e3f Florian Fainelli 2010-08-28  136  				size_t len, loff_t *ppos)
b63aa731cd9e3f Florian Fainelli 2010-08-28  137  {
b63aa731cd9e3f Florian Fainelli 2010-08-28  138  	if (len) {
b63aa731cd9e3f Florian Fainelli 2010-08-28  139  		if (!nowayout) {
b63aa731cd9e3f Florian Fainelli 2010-08-28  140  			size_t i;
b63aa731cd9e3f Florian Fainelli 2010-08-28  141  
b63aa731cd9e3f Florian Fainelli 2010-08-28  142  			/* In case it was set long ago */
b63aa731cd9e3f Florian Fainelli 2010-08-28  143  			expect_close = 0;
b63aa731cd9e3f Florian Fainelli 2010-08-28  144  
b63aa731cd9e3f Florian Fainelli 2010-08-28  145  			for (i = 0; i != len; i++) {
b63aa731cd9e3f Florian Fainelli 2010-08-28  146  				char c;
b63aa731cd9e3f Florian Fainelli 2010-08-28 @147  				if (get_user(c, data + i))
b63aa731cd9e3f Florian Fainelli 2010-08-28  148  					return -EFAULT;
b63aa731cd9e3f Florian Fainelli 2010-08-28  149  				if (c == 'V')
b63aa731cd9e3f Florian Fainelli 2010-08-28  150  					expect_close = 42;
b63aa731cd9e3f Florian Fainelli 2010-08-28  151  			}
b63aa731cd9e3f Florian Fainelli 2010-08-28  152  		}
b63aa731cd9e3f Florian Fainelli 2010-08-28  153  		bcm63xx_wdt_pet();
b63aa731cd9e3f Florian Fainelli 2010-08-28  154  	}
b63aa731cd9e3f Florian Fainelli 2010-08-28  155  	return len;
b63aa731cd9e3f Florian Fainelli 2010-08-28  156  }
b63aa731cd9e3f Florian Fainelli 2010-08-28  157  

:::::: The code at line 147 was first introduced by commit
:::::: b63aa731cd9e3fed7694a99f9c233f5f4b244f03 watchdog: add support for Broadcom BCM63xx built-in watchdog

:::::: TO: Florian Fainelli <florian@xxxxxxxxxxx>
:::::: CC: Wim Van Sebroeck <wim@xxxxxxxxx>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

Attachment: .config.gz
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