Make generic_writepages inlinable in current file.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>

Index: linux-2.6.26-rc5-devel/mm/page-writeback.c
===================================================================
--- linux-2.6.26-rc5-devel.orig/mm/page-writeback.c	2008-06-21 01:55:05.000000000 +0200
+++ linux-2.6.26-rc5-devel/mm/page-writeback.c	2008-06-21 01:59:23.000000000 +0200
@@ -981,8 +981,8 @@
  * This is a library function, which implements the writepages()
  * address_space_operation.
  */
-int generic_writepages(struct address_space *mapping,
-		       struct writeback_control *wbc)
+inline int generic_writepages(struct address_space *mapping,
+			      struct writeback_control *wbc)
 {
 	/* deal with chardevs and other special file */
 	if (!mapping->a_ops->writepage)