switch vfs_mkdir() and ->mkdir() to umode_t

vfs_mkdir() gets int, but immediately drops everything that might not
fit into umode_t and that's the only caller of ->mkdir()...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index 6bc346c..c24deda 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -66,7 +66,7 @@
 }
 #endif
 
-static int xattr_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+static int xattr_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 {
 	BUG_ON(!mutex_is_locked(&dir->i_mutex));
 	return dir->i_op->mkdir(dir, dentry, mode);