rtc: single_open() leaks

Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/char/genrtc.c b/drivers/char/genrtc.c
index bc9b84d..4f94375 100644
--- a/drivers/char/genrtc.c
+++ b/drivers/char/genrtc.c
@@ -465,7 +465,7 @@
 	.open		= gen_rtc_proc_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
-	.release	= seq_release,
+	.release	= single_release,
 };
 
 static int __init gen_rtc_proc_init(void)