NFS: Clean up - simplify the switch to read/write-through-MDS

Use nfs_pageio_reset_read_mds and nfs_pageio_reset_write_mds instead of
completely reinitialising the struct nfs_pageio_descriptor.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index d2f53dd..7cba228 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -112,19 +112,19 @@
 	}
 }
 
-void nfs_pageio_init_read_mds(struct nfs_pageio_descriptor *pgio,
+static void nfs_pageio_init_read_mds(struct nfs_pageio_descriptor *pgio,
 		struct inode *inode)
 {
 	nfs_pageio_init(pgio, inode, &nfs_pageio_read_ops,
 			NFS_SERVER(inode)->rsize, 0);
 }
-EXPORT_SYMBOL_GPL(nfs_pageio_init_read_mds);
 
 void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio)
 {
 	pgio->pg_ops = &nfs_pageio_read_ops;
 	pgio->pg_bsize = NFS_SERVER(pgio->pg_inode)->rsize;
 }
+EXPORT_SYMBOL_GPL(nfs_pageio_reset_read_mds);
 
 static void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
 		struct inode *inode)