linux-kernel - mm/kasan/sw_tags.c:211:6: warning: no previous prototype for 'kasan_tag

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Date:   Tue, 25 Jan 2022 10:35:34 +0800
From:   kernel test robot <lkp@...el.com>
To:     Peter Collingbourne <pcc@...gle.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Subject: mm/kasan/sw_tags.c:211:6: warning: no previous prototype for
 'kasan_tag_mismatch'

Hi Peter,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   dd81e1c7d5fb126e5fbc5c9e334d7b3ec29a16a0
commit: 1cbdf60bd1b74e397d48aa877367cfc621f45ffe kasan: arm64: support specialized outlined tag mismatch checks
date:   8 months ago
config: arm64-randconfig-r005-20220124 (https://download.01.org/0day-ci/archive/20220125/202201251032.njnCerSX-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 11.2.0
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1cbdf60bd1b74e397d48aa877367cfc621f45ffe
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 1cbdf60bd1b74e397d48aa877367cfc621f45ffe
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm64 SHELL=/bin/bash

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

All warnings (new ones prefixed by >>):

>> mm/kasan/sw_tags.c:211:6: warning: no previous prototype for 'kasan_tag_mismatch' [-Wmissing-prototypes]
     211 | void kasan_tag_mismatch(unsigned long addr, unsigned long access_info,
         |      ^~~~~~~~~~~~~~~~~~


vim +/kasan_tag_mismatch +211 mm/kasan/sw_tags.c

   210	
 > 211	void kasan_tag_mismatch(unsigned long addr, unsigned long access_info,

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