[chao:feature/dax 8/9] fs/f2fs/file.c:1106:10: error: implicit declaration of function 'dax_layout_busy_page'

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git feature/dax
head:   d08999836fd60ab725eee1f5a5fb3b00f7bcefd3
commit: ddf2be0f55254d0a1a8bc51f2c1597c09b1dd2aa [8/9] f2fs: handle layout changes to pinned DAX mappings
config: mips-randconfig-r002-20211220 (https://download.01.org/0day-ci/archive/20211221/202112210031.prMeKhRK-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 683cbc12b33e5c8dc8d29bf5ed79fbf45763aadd)
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 mips cross compiling tool for clang build
        # apt-get install binutils-mips-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git/commit/?id=ddf2be0f55254d0a1a8bc51f2c1597c09b1dd2aa
        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 ddf2be0f55254d0a1a8bc51f2c1597c09b1dd2aa
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash fs/f2fs/

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

All error/warnings (new ones prefixed by >>):

   fs/f2fs/file.c:584:7: error: implicit declaration of function 'daxdev_mapping_supported' [-Werror,-Wimplicit-function-declaration]
           if (!daxdev_mapping_supported(vma, F2FS_I_SB(inode)->s_daxdev))
                ^
>> fs/f2fs/file.c:1106:10: error: implicit declaration of function 'dax_layout_busy_page' [-Werror,-Wimplicit-function-declaration]
                   page = dax_layout_busy_page(inode->i_mapping);
                          ^
>> fs/f2fs/file.c:1106:8: warning: incompatible integer to pointer conversion assigning to 'struct page *' from 'int' [-Wint-conversion]
                   page = dax_layout_busy_page(inode->i_mapping);
                        ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   1 warning and 2 errors generated.


vim +/dax_layout_busy_page +1106 fs/f2fs/file.c

  1096	
  1097	int f2fs_break_layouts(struct inode *inode)
  1098	{
  1099		struct page *page;
  1100		int error;
  1101	
  1102		if (WARN_ON_ONCE(!rwsem_is_locked(&inode->i_mapping->invalidate_lock)))
  1103			return -EINVAL;
  1104	
  1105		do {
> 1106			page = dax_layout_busy_page(inode->i_mapping);
  1107			if (!page)
  1108				return 0;
  1109	
  1110			error = ___wait_var_event(&page->_refcount,
  1111					atomic_read(&page->_refcount) == 1,
  1112					TASK_INTERRUPTIBLE, 0, 0,
  1113					f2fs_wait_dax_page(inode));
  1114		} while (error == 0);
  1115	
  1116		return error;
  1117	}
  1118	

---
0-DAY CI Kernel Test Service, Intel Corporation
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