Hi Luc,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
master
head:   88bb507a74ea7d75fa49edd421eaa710a7d80598
commit: e5fc436f06eef54ef512ea55a9db8eb9f2e76959 sparse: use static inline for 
__chk_{user,io}_ptr()
date:   5 months ago
config: sh-randconfig-s031-20210202 (attached as .config)
compiler: sh4-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: v0.6.3-215-g0fb77bb6-dirty
        # 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e5fc436f06eef54ef512ea55a9db8eb9f2e76959
        git remote add linus 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout e5fc436f06eef54ef512ea55a9db8eb9f2e76959
        # 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=sh 

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


"sparse warnings: (new ones prefixed by >>)"
>> arch/sh/kernel/cpu/sh3/serial-sh770x.c:15:16: sparse: sparse: incorrect type 
>> in argument 1 (different base types) @@     expected void const volatile 
>> [noderef] __iomem *ptr @@     got unsigned int @@
   arch/sh/kernel/cpu/sh3/serial-sh770x.c:15:16: sparse:     expected void 
const volatile [noderef] __iomem *ptr
   arch/sh/kernel/cpu/sh3/serial-sh770x.c:15:16: sparse:     got unsigned int
   arch/sh/kernel/cpu/sh3/serial-sh770x.c:17:9: sparse: sparse: incorrect type 
in argument 1 (different base types) @@     expected void const volatile 
[noderef] __iomem *ptr @@     got unsigned int @@
   arch/sh/kernel/cpu/sh3/serial-sh770x.c:17:9: sparse:     expected void const 
volatile [noderef] __iomem *ptr
   arch/sh/kernel/cpu/sh3/serial-sh770x.c:17:9: sparse:     got unsigned int
   arch/sh/kernel/cpu/sh3/serial-sh770x.c:21:24: sparse: sparse: incorrect type 
in argument 1 (different base types) @@     expected void const volatile 
[noderef] __iomem *ptr @@     got unsigned int @@
   arch/sh/kernel/cpu/sh3/serial-sh770x.c:21:24: sparse:     expected void 
const volatile [noderef] __iomem *ptr
   arch/sh/kernel/cpu/sh3/serial-sh770x.c:21:24: sparse:     got unsigned int
   arch/sh/kernel/cpu/sh3/serial-sh770x.c:24:17: sparse: sparse: incorrect type 
in argument 1 (different base types) @@     expected void const volatile 
[noderef] __iomem *ptr @@     got unsigned int @@
   arch/sh/kernel/cpu/sh3/serial-sh770x.c:24:17: sparse:     expected void 
const volatile [noderef] __iomem *ptr
   arch/sh/kernel/cpu/sh3/serial-sh770x.c:24:17: sparse:     got unsigned int
   arch/sh/kernel/cpu/sh3/serial-sh770x.c:26:24: sparse: sparse: incorrect type 
in argument 1 (different base types) @@     expected void const volatile 
[noderef] __iomem *ptr @@     got unsigned int @@
   arch/sh/kernel/cpu/sh3/serial-sh770x.c:26:24: sparse:     expected void 
const volatile [noderef] __iomem *ptr
   arch/sh/kernel/cpu/sh3/serial-sh770x.c:26:24: sparse:     got unsigned int
   arch/sh/kernel/cpu/sh3/serial-sh770x.c:28:17: sparse: sparse: incorrect type 
in argument 1 (different base types) @@     expected void const volatile 
[noderef] __iomem *ptr @@     got unsigned int @@
   arch/sh/kernel/cpu/sh3/serial-sh770x.c:28:17: sparse:     expected void 
const volatile [noderef] __iomem *ptr
   arch/sh/kernel/cpu/sh3/serial-sh770x.c:28:17: sparse:     got unsigned int
--
   drivers/watchdog/sc520_wdt.c:233:37: sparse: sparse: incorrect type in 
initializer (different address spaces) @@     expected char const *__gu_addr @@ 
    got char const [noderef] __user * @@
   drivers/watchdog/sc520_wdt.c:233:37: sparse:     expected char const 
*__gu_addr
   drivers/watchdog/sc520_wdt.c:233:37: sparse:     got char const [noderef] 
__user *
>> drivers/watchdog/sc520_wdt.c:233:37: sparse: sparse: incorrect type in 
>> argument 1 (different address spaces) @@     expected void const volatile 
>> [noderef] __user *ptr @@     got char const *__gu_addr @@
   drivers/watchdog/sc520_wdt.c:233:37: sparse:     expected void const 
volatile [noderef] __user *ptr
   drivers/watchdog/sc520_wdt.c:233:37: sparse:     got char const *__gu_addr
   drivers/watchdog/sc520_wdt.c:294:21: sparse: sparse: incorrect type in 
initializer (different address spaces) @@     expected int const *__gu_addr @@  
   got int [noderef] __user *p @@
   drivers/watchdog/sc520_wdt.c:294:21: sparse:     expected int const 
*__gu_addr
   drivers/watchdog/sc520_wdt.c:294:21: sparse:     got int [noderef] __user *p
>> drivers/watchdog/sc520_wdt.c:294:21: sparse: sparse: incorrect type in 
>> argument 1 (different address spaces) @@     expected void const volatile 
>> [noderef] __user *ptr @@     got int const *__gu_addr @@
   drivers/watchdog/sc520_wdt.c:294:21: sparse:     expected void const 
volatile [noderef] __user *ptr
   drivers/watchdog/sc520_wdt.c:294:21: sparse:     got int const *__gu_addr
   drivers/watchdog/sc520_wdt.c:316:21: sparse: sparse: incorrect type in 
initializer (different address spaces) @@     expected int const *__gu_addr @@  
   got int [noderef] __user *p @@
   drivers/watchdog/sc520_wdt.c:316:21: sparse:     expected int const 
*__gu_addr
   drivers/watchdog/sc520_wdt.c:316:21: sparse:     got int [noderef] __user *p
   drivers/watchdog/sc520_wdt.c:316:21: sparse: sparse: incorrect type in 
argument 1 (different address spaces) @@     expected void const volatile 
[noderef] __user *ptr @@     got int const *__gu_addr @@
   drivers/watchdog/sc520_wdt.c:316:21: sparse:     expected void const 
volatile [noderef] __user *ptr
   drivers/watchdog/sc520_wdt.c:316:21: sparse:     got int const *__gu_addr

vim +15 arch/sh/kernel/cpu/sh3/serial-sh770x.c

61a6976bf19a6c Paul Mundt 2011-06-14   9  
61a6976bf19a6c Paul Mundt 2011-06-14  10  static void 
sh770x_sci_init_pins(struct uart_port *port, unsigned int cflag)
61a6976bf19a6c Paul Mundt 2011-06-14  11  {
61a6976bf19a6c Paul Mundt 2011-06-14  12        unsigned short data;
61a6976bf19a6c Paul Mundt 2011-06-14  13  
61a6976bf19a6c Paul Mundt 2011-06-14  14        /* We need to set SCPCR to 
enable RTS/CTS */
61a6976bf19a6c Paul Mundt 2011-06-14 @15        data = __raw_readw(SCPCR);
61a6976bf19a6c Paul Mundt 2011-06-14  16        /* Clear out SCP7MD1,0, 
SCP6MD1,0, SCP4MD1,0*/
61a6976bf19a6c Paul Mundt 2011-06-14  17        __raw_writew(data & 0x0fcf, 
SCPCR);
61a6976bf19a6c Paul Mundt 2011-06-14  18  
61a6976bf19a6c Paul Mundt 2011-06-14  19        if (!(cflag & CRTSCTS)) {
61a6976bf19a6c Paul Mundt 2011-06-14  20                /* We need to set SCPCR 
to enable RTS/CTS */
61a6976bf19a6c Paul Mundt 2011-06-14  21                data = 
__raw_readw(SCPCR);
61a6976bf19a6c Paul Mundt 2011-06-14  22                /* Clear out SCP7MD1,0, 
SCP4MD1,0,
61a6976bf19a6c Paul Mundt 2011-06-14  23                   Set SCP6MD1,0 = {01} 
(output)  */
61a6976bf19a6c Paul Mundt 2011-06-14  24                __raw_writew((data & 
0x0fcf) | 0x1000, SCPCR);
61a6976bf19a6c Paul Mundt 2011-06-14  25  
61a6976bf19a6c Paul Mundt 2011-06-14  26                data = 
__raw_readb(SCPDR);
61a6976bf19a6c Paul Mundt 2011-06-14  27                /* Set /RTS2 (bit6) = 0 
*/
61a6976bf19a6c Paul Mundt 2011-06-14  28                __raw_writeb(data & 
0xbf, SCPDR);
61a6976bf19a6c Paul Mundt 2011-06-14  29        }
61a6976bf19a6c Paul Mundt 2011-06-14  30  }
61a6976bf19a6c Paul Mundt 2011-06-14  31  

:::::: The code at line 15 was first introduced by commit
:::::: 61a6976bf19a6cf5dfcf37c3536665b316f22d49 serial: sh-sci: Abstract 
register maps.

:::::: TO: Paul Mundt <let...@linux-sh.org>
:::::: CC: Paul Mundt <let...@linux-sh.org>

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

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