switch d_materialise_unique() users to d_splice_alias()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
index 1c771931..37989f0 100644
--- a/fs/kernfs/dir.c
+++ b/fs/kernfs/dir.c
@@ -807,7 +807,7 @@
 	}
 
 	/* instantiate and hash dentry */
-	ret = d_materialise_unique(dentry, inode);
+	ret = d_splice_alias(inode, dentry);
  out_unlock:
 	mutex_unlock(&kernfs_mutex);
 	return ret;