Re: [PATCH RFC 3/3] mm/vmalloc: remove vwrite()

From: kernel test robot <lkp@intel.com>
To: kbuild-all@lists.01.org
Subject: Re: [PATCH RFC 3/3] mm/vmalloc: remove vwrite()
Date: Sat, 20 Mar 2021 03:01:04 +0800	[thread overview]
Message-ID: <202103200221.wtizJVAi-lkp@intel.com> (raw)
In-Reply-To: <20210319143452.25948-4-david@redhat.com>

[-- Attachment #1: Type: text/plain, Size: 3497 bytes --]

Hi David,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on m68k/for-next]
[also build test WARNING on sparc/master char-misc/char-misc-testing linus/master v5.12-rc3 next-20210319]
[cannot apply to uclinux-h8/h8300-next hnaz-linux-mm/master]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/David-Hildenbrand/drivers-char-remove-dev-kmem-for-good/20210319-223811
base:   https://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k.git for-next
config: arm-randconfig-r014-20210318 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project fcc1ce00931751ac02498986feb37744e9ace8de)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://github.com/0day-ci/linux/commit/7c68ea58a063d3f2d811e4b9cc0cee3514bed08f
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review David-Hildenbrand/drivers-char-remove-dev-kmem-for-good/20210319-223811
        git checkout 7c68ea58a063d3f2d811e4b9cc0cee3514bed08f
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm 

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

All warnings (new ones prefixed by >>):

>> mm/nommu.c:213:6: warning: no previous prototype for function 'vwrite' [-Wmissing-prototypes]
   long vwrite(char *buf, char *addr, unsigned long count)
        ^
   mm/nommu.c:213:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   long vwrite(char *buf, char *addr, unsigned long count)
   ^
   static 
   mm/nommu.c:1658:15: warning: no previous prototype for function 'arch_get_unmapped_area' [-Wmissing-prototypes]
   unsigned long arch_get_unmapped_area(struct file *file, unsigned long addr,
                 ^
   mm/nommu.c:1658:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   unsigned long arch_get_unmapped_area(struct file *file, unsigned long addr,
   ^
   static 
   2 warnings generated.

vim +/vwrite +213 mm/nommu.c

^1da177e4c3f41 Linus Torvalds 2005-04-16  212  
^1da177e4c3f41 Linus Torvalds 2005-04-16 @213  long vwrite(char *buf, char *addr, unsigned long count)
^1da177e4c3f41 Linus Torvalds 2005-04-16  214  {
^1da177e4c3f41 Linus Torvalds 2005-04-16  215  	/* Don't allow overflow */
^1da177e4c3f41 Linus Torvalds 2005-04-16  216  	if ((unsigned long) addr + count < count)
^1da177e4c3f41 Linus Torvalds 2005-04-16  217  		count = -(unsigned long) addr;
^1da177e4c3f41 Linus Torvalds 2005-04-16  218  
^1da177e4c3f41 Linus Torvalds 2005-04-16  219  	memcpy(addr, buf, count);
ac7149045d9fcc Choi Gi-yong   2014-04-07  220  	return count;
^1da177e4c3f41 Linus Torvalds 2005-04-16  221  }
^1da177e4c3f41 Linus Torvalds 2005-04-16  222  

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

[-- Attachment #2: config.gz --]
[-- Type: application/gzip, Size: 29664 bytes --]