linux-kernel - Re: drivers/tty/vt/keyboard.c:2037:13: sparse: sparse: incorrect type in initializer (different address spaces)

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Date:   Fri, 18 Dec 2020 07:28:55 +0100
From:   Jiri Slaby <jirislaby@...nel.org>
To:     kernel test robot <lkp@...el.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        linux-sh@...r.kernel.org, Rich Felker <dalias@...c.org>
Subject: Re: drivers/tty/vt/keyboard.c:2037:13: sparse: sparse: incorrect type
 in initializer (different address spaces)

On 16. 12. 20, 13:07, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   d01e7f10dae29eba0f9ada82b65d24e035d5b2f9
> commit: 07edff9265204e15c9fc8d07cc69e38c4c484e15 vt: keyboard, reorder user buffer handling in vt_do_kdgkb_ioctl
> date:   6 weeks ago
> config: sh-randconfig-s032-20201216 (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: v0.6.3-184-g1b896707-dirty
>          # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=07edff9265204e15c9fc8d07cc69e38c4c484e15
>          git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>          git fetch --no-tags linus master
>          git checkout 07edff9265204e15c9fc8d07cc69e38c4c484e15
>          # 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 <lkp@...el.com>
> 
> 
> "sparse warnings: (new ones prefixed by >>)"
>     drivers/tty/vt/keyboard.c:1745:21: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected unsigned int const *__gu_addr @@     got unsigned int [noderef] __user * @@
>     drivers/tty/vt/keyboard.c:1745:21: sparse:     expected unsigned int const *__gu_addr
>     drivers/tty/vt/keyboard.c:1745:21: sparse:     got unsigned int [noderef] __user *
>     drivers/tty/vt/keyboard.c:1745:21: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     

Guys,

any idea why __gu_addr in superH's __get_user_check is not marked as __user?

thanks,
-- 
js
suse labs