linux-kernel - [chao:feature/dax 4/9] fs/f2fs/file.c:584:14: error: implicit declaration of function 'daxdev_mapping

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Date:   Tue, 21 Dec 2021 05:57:57 +0800
From:   kernel test robot <lkp@...el.com>
To:     Chao Yu <yuchao0@...wei.com>, Chao Yu <chao@...nel.org>
Cc:     kbuild-all@...ts.01.org, Chao Yu <yuchao0@...wei.com>,
        Chao Yu <chao@...nel.org>, linux-kernel@...r.kernel.org
Subject: [chao:feature/dax 4/9] fs/f2fs/file.c:584:14: error: implicit
 declaration of function 'daxdev_mapping_supported'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git feature/dax
head:   d08999836fd60ab725eee1f5a5fb3b00f7bcefd3
commit: f154828642167c70161576b977082361123a5768 [4/9] f2fs: support dax page fault
config: microblaze-randconfig-r015-20211220 (https://download.01.org/0day-ci/archive/20211221/202112210512.TWkTNRT1-lkp@intel.com/config)
compiler: microblaze-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/chao/linux.git/commit/?id=f154828642167c70161576b977082361123a5768
        git remote add chao https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git
        git fetch --no-tags chao feature/dax
        git checkout f154828642167c70161576b977082361123a5768
        # 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=microblaze SHELL=/bin/bash fs/f2fs/

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

All errors (new ones prefixed by >>):

   In file included from include/linux/build_bug.h:5,
                    from include/linux/container_of.h:5,
                    from include/linux/list.h:5,
                    from include/linux/wait.h:7,
                    from include/linux/wait_bit.h:8,
                    from include/linux/fs.h:6,
                    from fs/f2fs/file.c:8:
   fs/f2fs/file.c: In function 'f2fs_file_mmap':
>> fs/f2fs/file.c:584:14: error: implicit declaration of function 'daxdev_mapping_supported' [-Werror=implicit-function-declaration]
     584 |         if (!daxdev_mapping_supported(vma, F2FS_I_SB(inode)->s_daxdev))
         |              ^~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var'
      58 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
         |                                                    ^~~~
   fs/f2fs/file.c:584:9: note: in expansion of macro 'if'
     584 |         if (!daxdev_mapping_supported(vma, F2FS_I_SB(inode)->s_daxdev))
         |         ^~
   cc1: some warnings being treated as errors


vim +/daxdev_mapping_supported +584 fs/f2fs/file.c

   569	
   570	static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
   571	{
   572		struct inode *inode = file_inode(file);
   573	
   574		if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
   575			return -EIO;
   576	
   577		if (!f2fs_is_compress_backend_ready(inode))
   578			return -EOPNOTSUPP;
   579	
   580		/*
   581		 * We don't support synchronous mappings for non-DAX files and
   582		 * for DAX files if underneath dax_device is not synchronous.
   583		 */
 > 584		if (!daxdev_mapping_supported(vma, F2FS_I_SB(inode)->s_daxdev))
   585			return -EOPNOTSUPP;
   586	
   587		file_accessed(file);
   588	
   589		if (IS_DAX(inode)) {
   590			vma->vm_ops = &f2fs_dax_vm_ops;
   591			vma->vm_flags |= VM_HUGEPAGE;
   592		} else {
   593			vma->vm_ops = &f2fs_file_vm_ops;
   594		}
   595	
   596		set_inode_flag(inode, FI_MMAP_FILE);
   597		return 0;
   598	}
   599	

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