linux-kernel - [chao:feature/dax 8/9] fs/f2fs/file.c:1106:24: error: implicit declaration of function 'dax_layout_busy

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Date:   Tue, 21 Dec 2021 07:51:06 +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 8/9] fs/f2fs/file.c:1106:24: error: implicit
 declaration of function 'dax_layout_busy_page'

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: microblaze-randconfig-r015-20211220 (https://download.01.org/0day-ci/archive/20211221/202112210758.BoWlhZBt-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=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=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 error/warnings (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))
         |         ^~
   fs/f2fs/file.c: In function 'f2fs_break_layouts':
>> fs/f2fs/file.c:1106:24: error: implicit declaration of function 'dax_layout_busy_page' [-Werror=implicit-function-declaration]
    1106 |                 page = dax_layout_busy_page(inode->i_mapping);
         |                        ^~~~~~~~~~~~~~~~~~~~
>> fs/f2fs/file.c:1106:22: warning: assignment to 'struct page *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
    1106 |                 page = dax_layout_busy_page(inode->i_mapping);
         |                      ^
   cc1: some warnings being treated as errors


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
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org