linux-kernel - [PATCH v3.6 11/19] atm: slight optimization of addr compare

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Message-ID: <52CCBDC0.1010100@huawei.com>
Date:	Wed, 8 Jan 2014 10:53:52 +0800
From:	Ding Tianhong <dingtianhong@...wei.com>
To:	Chas Williams <chas@....nrl.navy.mil>,
	<linux-atm-general@...ts.sourceforge.net>,
	Netdev <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH v3.6 11/19] atm: slight optimization of addr compare

Use possibly more efficient ether_addr_equal
instead of memcmp.

Cc: Chas Williams <chas@....nrl.navy.mil>
Cc: linux-atm-general@...ts.sourceforge.net
Cc: netdev@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
Signed-off-by: Ding Tianhong <dingtianhong@...wei.com>
---
 drivers/atm/nicstar.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/atm/nicstar.c b/drivers/atm/nicstar.c
index 5aca5f4..9587e95 100644
--- a/drivers/atm/nicstar.c
+++ b/drivers/atm/nicstar.c
@@ -52,6 +52,7 @@
 #include <asm/io.h>
 #include <asm/uaccess.h>
 #include <linux/atomic.h>
+#include <linux/etherdevice.h>
 #include "nicstar.h"
 #ifdef CONFIG_ATM_NICSTAR_USE_SUNI
 #include "suni.h"
@@ -781,8 +782,7 @@ static int ns_init_card(int i, struct pci_dev *pcidev)
 	if (mac[i] == NULL || !mac_pton(mac[i], card->atmdev->esi)) {
 		nicstar_read_eprom(card->membase, NICSTAR_EPROM_MAC_ADDR_OFFSET,
 				   card->atmdev->esi, 6);
-		if (memcmp(card->atmdev->esi, "\x00\x00\x00\x00\x00\x00", 6) ==
-		    0) {
+		if (ether_addr_equal(card->atmdev->esi, "\x00\x00\x00\x00\x00\x00")) {
 			nicstar_read_eprom(card->membase,
 					   NICSTAR_EPROM_MAC_ADDR_OFFSET_ALT,
 					   card->atmdev->esi, 6);
-- 
1.8.0


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