From: Hans Reiser <reiser@namesys.com>

Reiser4 is trying to add/remove pages to/from address space, so it needs
add_to_page_cache_lru to be EXPORT_SYMBOL-ed.

[bunk@stusta.de: unexport {,__}remove_from_page_cache]
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/filemap.c |    1 +
 1 file changed, 1 insertion(+)

diff -puN mm/filemap.c~reiser4-export-remove_from_page_cache mm/filemap.c
--- a/mm/filemap.c~reiser4-export-remove_from_page_cache
+++ a/mm/filemap.c
@@ -287,6 +287,7 @@ int wait_on_page_writeback_range(struct 
 
 	return ret;
 }
+EXPORT_SYMBOL(add_to_page_cache_lru);
 
 /**
  * sync_page_range - write and wait on all pages in the passed range
_