[patch] add printk_ratelimit to atkbd_interrupt

[Qi Yong <qiyong@mail.fc-cn.com>]

Add printk_ratelimit() to atkbd_interrupt(). I get "Spurious ACK" messages flushing on my
screen. This patch helps to read the screen.

Signed-off-by: Qi Yong <qiyong@mail.fc-cn.com>
--
diff --git a/drivers/input/keyboard/atkbd.c b/drivers/input/keyboard/atkbd.c
index be1fe46..13e6bd4 100644
--- a/drivers/input/keyboard/atkbd.c
+++ b/drivers/input/keyboard/atkbd.c
@@ -408,9 +408,10 @@ static irqreturn_t atkbd_interrupt(struct serio *serio, unsigned char data,
 			goto out;
 		case ATKBD_RET_ACK:
 		case ATKBD_RET_NAK:
-			printk(KERN_WARNING "atkbd.c: Spurious %s on %s. "
-			       "Some program might be trying access hardware directly.\n",
-			       data == ATKBD_RET_ACK ? "ACK" : "NAK", serio->phys);
+			if (printk_ratelimit())
+				printk(KERN_WARNING "atkbd.c: Spurious %s on %s. "
+				       "Some program might be trying access hardware directly.\n",
+				       data == ATKBD_RET_ACK ? "ACK" : "NAK", serio->phys);
 			goto out;
 		case ATKBD_RET_HANGEUL:
 		case ATKBD_RET_HANJA:
-
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