linux-kernel - Re: [PATCH v8 1/4] userfaultfd: Add UFFD WP Async support

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Date:   Tue, 24 Jan 2023 19:15:10 +0800
From:   kernel test robot <lkp@...el.com>
To:     Muhammad Usama Anjum <usama.anjum@...labora.com>,
        Peter Xu <peterx@...hat.com>,
        David Hildenbrand <david@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michał Mirosław <emmir@...gle.com>,
        Andrei Vagin <avagin@...il.com>,
        Danylo Mocherniuk <mdanylo@...gle.com>,
        Paul Gofman <pgofman@...eweavers.com>,
        Cyrill Gorcunov <gorcunov@...il.com>
Cc:     oe-kbuild-all@...ts.linux.dev,
        Linux Memory Management List <linux-mm@...ck.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Christian Brauner <brauner@...nel.org>,
        Yang Shi <shy828301@...il.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        "Liam R . Howlett" <Liam.Howlett@...cle.com>,
        Yun Zhou <yun.zhou@...driver.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Alex Sierra <alex.sierra@....com>,
        Muhammad Usama Anjum <usama.anjum@...labora.com>,
        Matthew Wilcox <willy@...radead.org>,
        Pasha Tatashin <pasha.tatashin@...een.com>,
        Mike Rapoport <rppt@...nel.org>, Nadav Amit <namit@...are.com>,
        Axel Rasmussen <axelrasmussen@...gle.com>,
        "Gustavo A . R . Silva" <gustavoars@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, Greg KH <greg@...ah.com>
Subject: Re: [PATCH v8 1/4] userfaultfd: Add UFFD WP Async support

Hi Muhammad,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on shuah-kselftest/next]
[also build test ERROR on shuah-kselftest/fixes linus/master v6.2-rc5 next-20230124]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Muhammad-Usama-Anjum/userfaultfd-Add-UFFD-WP-Async-support/20230124-164601
base:   https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git next
patch link:    https://lore.kernel.org/r/20230124084323.1363825-2-usama.anjum%40collabora.com
patch subject: [PATCH v8 1/4] userfaultfd: Add UFFD WP Async support
config: powerpc-allnoconfig (https://download.01.org/0day-ci/archive/20230124/202301241830.KlT5Xcjy-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 12.1.0
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://github.com/intel-lab-lkp/linux/commit/59e98aec663b7ca8fd5f3b3d2a0f17f777f425c4
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Muhammad-Usama-Anjum/userfaultfd-Add-UFFD-WP-Async-support/20230124-164601
        git checkout 59e98aec663b7ca8fd5f3b3d2a0f17f777f425c4
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash arch/powerpc/kernel/

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

All errors (new ones prefixed by >>):

   In file included from include/linux/hugetlb.h:14,
                    from arch/powerpc/kernel/setup-common.c:37:
>> include/linux/userfaultfd_k.h:278:5: error: no previous prototype for 'userfaultfd_wp_async' [-Werror=missing-prototypes]
     278 | int userfaultfd_wp_async(struct vm_area_struct *vma)
         |     ^~~~~~~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors


vim +/userfaultfd_wp_async +278 include/linux/userfaultfd_k.h

   277	
 > 278	int userfaultfd_wp_async(struct vm_area_struct *vma)
   279	{
   280		return false;
   281	}
   282	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests