From: Hans Reiser <reiser@namesys.com>

Reiser4 implements read without help of generic_file_read, but it uses
handle_ra_miss().  So, this patch makes handle_ra_miss() EXPROT_SYMBOL. 
Future filesystems may find this patch useful as well.


Signed-off-by: Andrew Morton <akpm@osdl.org>
---

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

diff -puN mm/readahead.c~reiser4-export-handle_ra_miss mm/readahead.c
--- a/mm/readahead.c~reiser4-export-handle_ra_miss
+++ a/mm/readahead.c
@@ -732,6 +732,7 @@ void handle_ra_miss(struct address_space
 	ra->flags &= ~RA_FLAG_INCACHE;
 	ra->cache_hit = 0;
 }
+EXPORT_SYMBOL_GPL(handle_ra_miss);
 
 /*
  * Given a desired number of PAGE_CACHE_SIZE readahead pages, return a
_