linux-kernel - [PATCH 2/4] IPMI: Remove unnecessary memory barriers

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Date:	Thu, 14 Feb 2008 12:28:17 -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 2/4] IPMI: Remove unnecessary memory barriers

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

Remove some unnecessary barriers.

Signed-off-by: Corey Minyard <cminyard@...sta.com>
---
This can be folded into ipmi-dont-grab-locks-in-run-to-completion-mode.patch

Index: linux-2.6.24/drivers/char/ipmi/ipmi_msghandler.c
===================================================================
--- linux-2.6.24.orig/drivers/char/ipmi/ipmi_msghandler.c
+++ linux-2.6.24/drivers/char/ipmi/ipmi_msghandler.c
@@ -3518,7 +3518,6 @@ void ipmi_smi_msg_received(ipmi_smi_t   
 	/* To preserve message order, if the list is not empty, we
            tack this message onto the end of the list. */
 	run_to_completion = intf->run_to_completion;
-	barrier();
 	if (!run_to_completion)
 		spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
 	if (!list_empty(&intf->waiting_msgs)) {
@@ -3535,7 +3534,6 @@ void ipmi_smi_msg_received(ipmi_smi_t   
 		/* Could not handle the message now, just add it to a
                    list to handle later. */
 		run_to_completion = intf->run_to_completion;
-		barrier();
 		if (!run_to_completion)
 			spin_lock_irqsave(&intf->waiting_msgs_lock, flags);
 		list_add_tail(&msg->link, &intf->waiting_msgs);
--
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