Re: [PATCH v5 8/8] device-dax: compound devmap support

[kernel test robot <lkp@intel.com>]

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In-Reply-To: <20211112150824.11028-9-joao.m.martins@oracle.com>
References: <20211112150824.11028-9-joao.m.martins@oracle.com>
TO: Joao Martins <joao.m.martins@oracle.com>
TO: linux-mm@kvack.org
CC: Dan Williams <dan.j.williams@intel.com>
CC: Vishal Verma <vishal.l.verma@intel.com>
CC: Dave Jiang <dave.jiang@intel.com>
CC: Naoya Horiguchi <naoya.horiguchi@nec.com>
CC: Matthew Wilcox <willy@infradead.org>
CC: Jason Gunthorpe <jgg@ziepe.ca>
CC: John Hubbard <jhubbard@nvidia.com>
CC: Jane Chu <jane.chu@oracle.com>
CC: Muchun Song <songmuchun@bytedance.com>

Hi Joao,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on hnaz-mm/master]

url:    https://github.com/0day-ci/linux/commits/Joao-Martins/mm-dax-Introduce-compound-pages-in-devmap/20211112-231110
base:   https://github.com/hnaz/linux-mm master
config: x86_64-randconfig-a013-20211115 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project fbe72e41b99dc7994daac300d208a955be3e4a0a)
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://github.com/0day-ci/linux/commit/c9e6e4bec537287b0e2cf8544276f77d02f1d00c
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Joao-Martins/mm-dax-Introduce-compound-pages-in-devmap/20211112-231110
        git checkout c9e6e4bec537287b0e2cf8544276f77d02f1d00c
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/

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 >>):

   drivers/dax/device.c:419:5: warning: no previous prototype for function 'dev_dax_probe' [-Wmissing-prototypes]
   int dev_dax_probe(struct dev_dax *dev_dax)
       ^
   drivers/dax/device.c:419:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int dev_dax_probe(struct dev_dax *dev_dax)
   ^
   static 
   1 warning generated.
>> drivers/dax/device.o: warning: objtool: dev_dax_probe()+0x43c: unreachable instruction

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

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