linux-kernel - drivers/watchdog/mtx-1_wdt.c:184:27: sparse: sparse: incorrect type in initializer (incompatible argument 2 (different address spaces))

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Message-ID: <202204091208.7UtE1W6a-lkp@intel.com>
Date:   Sat, 9 Apr 2022 13:01:26 +0800
From:   kernel test robot <lkp@...el.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>
Subject: drivers/watchdog/mtx-1_wdt.c:184:27: sparse: sparse: incorrect type
 in initializer (incompatible argument 2 (different address spaces))

Hi Linus,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   6c7376da23587738ab0e84b8b90b6cc02db5181e
commit: 76215889be9d2cd388207545424bbbe3bf80e1ea watchdog: mtx-1: drop au1000.h header file
date:   10 months ago
config: mips-randconfig-s032-20220409 (https://download.01.org/0day-ci/archive/20220409/202204091208.7UtE1W6a-lkp@intel.com/config)
compiler: mips64el-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=76215889be9d2cd388207545424bbbe3bf80e1ea
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 76215889be9d2cd388207545424bbbe3bf80e1ea
        # 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=mips SHELL=/bin/bash drivers/watchdog/

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


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/mtx-1_wdt.c:184:27: sparse: sparse: incorrect type in initializer (incompatible argument 2 (different address spaces)) @@     expected long ( *write )( ... ) @@     got long ( * )( ... ) @@
   drivers/watchdog/mtx-1_wdt.c:184:27: sparse:     expected long ( *write )( ... )
   drivers/watchdog/mtx-1_wdt.c:184:27: sparse:     got long ( * )( ... )

vim +184 drivers/watchdog/mtx-1_wdt.c

04bf3b4f5fc033 drivers/char/watchdog/mtx-1_wdt.c Florian Fainelli 2007-05-06  177  
b47a166ed0baaa drivers/watchdog/mtx-1_wdt.c      Jan Engelhardt   2008-01-22  178  static const struct file_operations mtx1_wdt_fops = {
04bf3b4f5fc033 drivers/char/watchdog/mtx-1_wdt.c Florian Fainelli 2007-05-06  179  	.owner		= THIS_MODULE,
04bf3b4f5fc033 drivers/char/watchdog/mtx-1_wdt.c Florian Fainelli 2007-05-06  180  	.llseek		= no_llseek,
ed78c2da149247 drivers/watchdog/mtx-1_wdt.c      Alan Cox         2008-05-19  181  	.unlocked_ioctl	= mtx1_wdt_ioctl,
b6dfb2477fb0bf drivers/watchdog/mtx-1_wdt.c      Arnd Bergmann    2019-06-03  182  	.compat_ioctl	= compat_ptr_ioctl,
04bf3b4f5fc033 drivers/char/watchdog/mtx-1_wdt.c Florian Fainelli 2007-05-06  183  	.open		= mtx1_wdt_open,
04bf3b4f5fc033 drivers/char/watchdog/mtx-1_wdt.c Florian Fainelli 2007-05-06 @184  	.write		= mtx1_wdt_write,
7944d3a5a70ee5 drivers/watchdog/mtx-1_wdt.c      Wim Van Sebroeck 2008-08-06  185  	.release	= mtx1_wdt_release,
04bf3b4f5fc033 drivers/char/watchdog/mtx-1_wdt.c Florian Fainelli 2007-05-06  186  };
04bf3b4f5fc033 drivers/char/watchdog/mtx-1_wdt.c Florian Fainelli 2007-05-06  187  
04bf3b4f5fc033 drivers/char/watchdog/mtx-1_wdt.c Florian Fainelli 2007-05-06  188  

:::::: The code at line 184 was first introduced by commit
:::::: 04bf3b4f5fc033adf921f2e57d034ddbebef5fe7 [WATCHDOG] MTX-1 Watchdog driver

:::::: TO: Florian Fainelli <florian.fainelli@...-evry.fr>
:::::: CC: Wim Van Sebroeck <wim@...ana.be>

-- 
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https://01.org/lkp