[PATCH] inline generic_writepages()

generic_writepages() is just a wrapper around mpage_writepages(), so
inline it.

fs/block_dev.c

@@ -20,6 +20,7 @@
 #include <linux/module.h>
 #include <linux/blkpg.h>
 #include <linux/buffer_head.h>
+#include <linux/mpage.h>
 
 #include <asm/uaccess.h>
 

include/linux/mm.h

@@ -461,7 +461,6 @@ extern int filemap_sync(struct vm_area_struct *, unsigned long,	size_t, unsigned
 extern struct page *filemap_nopage(struct vm_area_struct *, unsigned long, int);
 
 /* mm/page-writeback.c */
-int generic_writepages(struct address_space *mapping, int *nr_to_write);
 int write_one_page(struct page *page, int wait);
 
 /* readahead.c */

include/linux/mpage.h

@@ -16,3 +16,8 @@ int mpage_readpage(struct page *page, get_block_t get_block);
 int mpage_writepages(struct address_space *mapping,
 		int *nr_to_write, get_block_t get_block);
 
+static inline int
+generic_writepages(struct address_space *mapping, int *nr_to_write)
+{
+	return mpage_writepages(mapping, nr_to_write, NULL);
+}

mm/page-writeback.c

@@ -316,12 +316,6 @@ int generic_vm_writeback(struct page *page, int *nr_to_write)
 }
 EXPORT_SYMBOL(generic_vm_writeback);
 
-int generic_writepages(struct address_space *mapping, int *nr_to_write)
-{
-	return mpage_writepages(mapping, nr_to_write, NULL);
-}
-EXPORT_SYMBOL(generic_writepages);
-
 int do_writepages(struct address_space *mapping, int *nr_to_write)
 {
 	if (mapping->a_ops->writepages)

mm/page_io.c

@@ -17,6 +17,7 @@
 #include <linux/bio.h>
 #include <linux/swapops.h>
 #include <linux/buffer_head.h>	/* for block_sync_page() */
+#include <linux/mpage.h>
 #include <asm/pgtable.h>
 
 static struct bio *