NFS: make nfs_wb_page_priority() static

nfs_wb_page_priority() can now become static.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/write.c

@@ -1436,7 +1436,8 @@ out:
 	return ret;
 }
 
-int nfs_wb_page_priority(struct inode *inode, struct page *page, int how)
+static int nfs_wb_page_priority(struct inode *inode, struct page *page,
+				int how)
 {
 	loff_t range_start = page_offset(page);
 	loff_t range_end = range_start + (loff_t)(PAGE_CACHE_SIZE - 1);

include/linux/nfs_fs.h

@@ -422,7 +422,6 @@ extern long nfs_sync_mapping_wait(struct address_space *, struct writeback_contr
 extern int nfs_wb_all(struct inode *inode);
 extern int nfs_wb_nocommit(struct inode *inode);
 extern int nfs_wb_page(struct inode *inode, struct page* page);
-extern int nfs_wb_page_priority(struct inode *inode, struct page* page, int how);
 extern int nfs_wb_page_cancel(struct inode *inode, struct page* page);
 #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
 extern int  nfs_commit_inode(struct inode *, int);