switch ->mknod() to umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/mm/shmem.c b/mm/shmem.c
index 542aad2..4000f37 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1456,7 +1456,7 @@
  * File creation. Allocate an inode, and we're done..
  */
 static int
-shmem_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
+shmem_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev)
 {
 	struct inode *inode;
 	int error = -ENOSPC;