diff --git a/[refs] b/[refs]
index 024d6f51fa55..c975c146ac2b 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7591103c08abade60aeddb432ed0686ddd0de1c6
+refs/heads/master: 4aba41ea8bdc1b475861f5e5c1649ab20251090c
diff --git a/trunk/drivers/serial/8250.c b/trunk/drivers/serial/8250.c
index d4104a3bbe87..d3ca7d32abe0 100644
--- a/trunk/drivers/serial/8250.c
+++ b/trunk/drivers/serial/8250.c
@@ -2969,6 +2969,9 @@ static int __init serial8250_init(void)
 		"%d ports, IRQ sharing %sabled\n", nr_uarts,
 		share_irqs ? "en" : "dis");
 
+	for (i = 0; i < NR_IRQS; i++)
+		spin_lock_init(&irq_lists[i].lock);
+
 #ifdef CONFIG_SPARC
 	ret = sunserial_register_minors(&serial8250_reg, UART_NR);
 #else