linux-kernel - Re: arch/xtensa/include/asm/uaccess.h:40:22: error: implicit declaration of function 'uaccess_kernel'; did you mean 'getname

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Date:   Sun, 19 May 2019 22:50:44 -0700
From:   Max Filippov <jcmvbkbc@...il.com>
To:     kbuild test robot <lkp@...el.com>
Cc:     Matt Sickler <Matt.Sickler@...tronics.com>, kbuild-all@...org,
        LKML <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: arch/xtensa/include/asm/uaccess.h:40:22: error: implicit
 declaration of function 'uaccess_kernel'; did you mean 'getname_kernel'?

Hello,

On Sun, May 19, 2019 at 10:39 PM kbuild test robot <lkp@...el.com> wrote:
> Hi Matt,
>
> FYI, the error/warning still remains.
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   a188339ca5a396acc588e5851ed7e19f66b0ebd9
> commit: 7df95299b94a63ec67a6389fc02dc25019a80ee8 staging: kpc2000: Add DMA driver
> date:   4 weeks ago
> config: xtensa-allmodconfig (attached as .config)
> compiler: xtensa-linux-gcc (GCC) 8.1.0
> reproduce:
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         git checkout 7df95299b94a63ec67a6389fc02dc25019a80ee8
>         # save the attached .config to linux build tree
>         GCC_VERSION=8.1.0 make.cross ARCH=xtensa
>
> If you fix the issue, kindly add following tag
> Reported-by: kbuild test robot <lkp@...el.com>
>
> All errors (new ones prefixed by >>):
>
>    In file included from drivers/staging/kpc2000/kpc_dma/fileops.c:11:
>    arch/xtensa/include/asm/uaccess.h: In function 'clear_user':
> >> arch/xtensa/include/asm/uaccess.h:40:22: error: implicit declaration of function 'uaccess_kernel'; did you mean 'getname_kernel'? [-Werror=implicit-function-declaration]
>     #define __kernel_ok (uaccess_kernel())
>                          ^~~~~~~~~~~~~~

I've posted a fix for this issue here:
  https://lkml.org/lkml/2019/5/8/956

If there are post merge window pull requests planned for the
staging tree please consider including this fix. Alternatively
if I could get an ack for this fix I'd submit it in a pull request
from the xtensa tree.

--
Thanks.
-- Max