[dhowells-fs:fscache-rewrite-indexing 72/75] fs/9p/vfs_addr.c:365: undefined reference to `fscache_set_page_dirty'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git fscache-rewrite-indexing
head:   96d4e1af98c26988d3c1b3cf688974c24de90fa9
commit: cf8fa20c911971b0aba604031f1cd488d3a5583b [72/75] 9p: Copy local writes to the cache when writing to the server
config: i386-debian-10.3 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/commit/?id=cf8fa20c911971b0aba604031f1cd488d3a5583b
        git remote add dhowells-fs https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git
        git fetch --no-tags dhowells-fs fscache-rewrite-indexing
        git checkout cf8fa20c911971b0aba604031f1cd488d3a5583b
        # save the attached .config to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   ld: fs/9p/vfs_super.o: in function `fscache_unuse_cookie':
   include/linux/fscache.h:286: undefined reference to `__fscache_unuse_cookie'
   ld: include/linux/fscache.h:286: undefined reference to `__fscache_unuse_cookie'
   ld: fs/9p/vfs_inode.o: in function `fscache_resize_cookie':
   include/linux/fscache.h:386: undefined reference to `__fscache_resize_cookie'
   ld: fs/9p/vfs_inode.o: in function `fscache_unuse_cookie':
   include/linux/fscache.h:286: undefined reference to `__fscache_unuse_cookie'
   ld: fs/9p/vfs_inode.o: in function `fscache_relinquish_cookie':
   include/linux/fscache.h:305: undefined reference to `__fscache_relinquish_cookie'
   ld: fs/9p/vfs_inode.o: in function `fscache_use_cookie':
   include/linux/fscache.h:269: undefined reference to `__fscache_use_cookie'
   ld: fs/9p/vfs_inode_dotl.o: in function `fscache_use_cookie':
   include/linux/fscache.h:269: undefined reference to `__fscache_use_cookie'
   ld: fs/9p/vfs_addr.o: in function `fscache_write_to_cache':
   include/linux/fscache.h:596: undefined reference to `__fscache_write_to_cache'
   ld: fs/9p/vfs_addr.o: in function `fscache_begin_read_operation':
   include/linux/fscache.h:483: undefined reference to `__fscache_begin_read_operation'
   ld: fs/9p/vfs_addr.o: in function `v9fs_set_page_dirty':
>> fs/9p/vfs_addr.c:365: undefined reference to `fscache_set_page_dirty'
   ld: fs/9p/vfs_addr.o: in function `fscache_invalidate':
>> include/linux/fscache.h:444: undefined reference to `__fscache_invalidate'
   ld: fs/9p/vfs_addr.o: in function `arch_atomic_inc':
>> arch/x86/include/asm/atomic.h:95: undefined reference to `fscache_n_updates'
   ld: fs/9p/vfs_file.o: in function `fscache_use_cookie':
   include/linux/fscache.h:269: undefined reference to `__fscache_use_cookie'
   ld: fs/9p/vfs_dir.o: in function `fscache_unuse_cookie':
   include/linux/fscache.h:286: undefined reference to `__fscache_unuse_cookie'
   ld: include/linux/fscache.h:286: undefined reference to `__fscache_unuse_cookie'
   ld: fs/9p/v9fs.o: in function `fscache_relinquish_volume':
   include/linux/fscache.h:221: undefined reference to `__fscache_relinquish_volume'
   ld: fs/9p/cache.o: in function `fscache_acquire_volume':
   include/linux/fscache.h:202: undefined reference to `__fscache_acquire_volume'
   ld: fs/9p/cache.o: in function `fscache_acquire_cookie':
   include/linux/fscache.h:250: undefined reference to `__fscache_acquire_cookie'


vim +365 fs/9p/vfs_addr.c

   355	
   356	#ifdef CONFIG_9P_FSCACHE
   357	/*
   358	 * Mark a page as having been made dirty and thus needing writeback.  We also
   359	 * need to pin the cache object to write back to.
   360	 */
   361	static int v9fs_set_page_dirty(struct page *page)
   362	{
   363		struct v9fs_inode *v9inode = V9FS_I(page->mapping->host);
   364	
 > 365		return fscache_set_page_dirty(page, v9fs_inode_cookie(v9inode));
   366	}
   367	#else
   368	#define v9fs_set_page_dirty __set_page_dirty_nobuffers
   369	#endif
   370	

---
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