linux-kernel - [PATCH 1/4] IPMI: Change barrier to cpu

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Date:	Thu, 14 Feb 2008 12:26:38 -0600
From:	Corey Minyard <minyard@....org>
To:	Linux Kernel <linux-kernel@...r.kernel.org>
Cc:	Andrew Morton <akpm@...l.org>,
	OpenIPMI Developers <openipmi-developer@...ts.sourceforge.net>
Subject: [PATCH 1/4] IPMI: Change barrier to cpu_relax in poweroff code

From: Corey Minyard <cminyard@...sta.com>

Change a barrier to cpu_relax(), which is more appropriate for a
polling loop.

Signed-off-by: Corey Minyard <cminyard@...sta.com>
---

Index: linux-2.6.24/drivers/char/ipmi/ipmi_poweroff.c
===================================================================
--- linux-2.6.24.orig/drivers/char/ipmi/ipmi_poweroff.c
+++ linux-2.6.24/drivers/char/ipmi/ipmi_poweroff.c
@@ -175,7 +175,7 @@ static int ipmi_request_in_rc_mode(ipmi_
 	 */
 	while (atomic_read(&dummy_count) > 0) {
 		ipmi_poll_interface(user);
-		barrier();
+		cpu_relax();
 	}
 
 	return halt_recv_msg.msg.data[0];
--
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