s390: add barriers to qeth driver

Frank Blaschka · Jeff Garzik · commit 54ab2927d385 · 2007-07-16T18:28:04.000-04:00
Add barrier to loop where atomic variable is evaluated.

Signed-off-by: Frank Blaschka &lt;frank.blaschka@de.ibm.com&gt;
Signed-off-by: Ursula Braun &lt;braunu@de.ibm.com&gt;
Signed-off-by: Frank Pavlic &lt;fpavlic@de.ibm.com&gt;
Signed-off-by: Jeff Garzik &lt;jeff@garzik.org&gt;
diff --git a/drivers/s390/net/qeth_main.c b/drivers/s390/net/qeth_main.c
@@ -1935,6 +1935,7 @@ qeth_send_control_data(struct qeth_card *card, int len,
 			atomic_inc(&reply->received);
 			wake_up(&reply->wait_q);
 		}
+		cpu_relax();
 	};
 	rc = reply->rc;
 	qeth_put_reply(reply);

Original file line number	Diff line number	Diff line change
`@@ -1935,6 +1935,7 @@ qeth_send_control_data(struct qeth_card *card, int len,`
`1935`	`1935`	`atomic_inc(&reply->received);`
`1936`	`1936`	`wake_up(&reply->wait_q);`
`1937`	`1937`	`}`
	`1938`	`+ cpu_relax();`
`1938`	`1939`	`};`
`1939`	`1940`	`rc = reply->rc;`
`1940`	`1941`	`qeth_put_reply(reply);`