linux-kernel - [PATCH 3/11] mac80211: use ether_addr_equal

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Message-Id: <1388427307-8691-4-git-send-email-Julia.Lawall@lip6.fr>
Date:	Mon, 30 Dec 2013 19:14:59 +0100
From:	Julia Lawall <Julia.Lawall@...6.fr>
To:	Christian Lamparter <chunkeey@...glemail.com>
Cc:	kernel-janitors@...r.kernel.org,
	"John W. Linville" <linville@...driver.com>,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 3/11] mac80211: use ether_addr_equal_64bits

From: Julia Lawall <Julia.Lawall@...6.fr>

Ether_addr_equal_64bits is more efficient than ether_addr_equal, and can be
used when each argument is an array within a structure that contains at
least two bytes of data beyond the array.

The structures involved are:
ieee80211_hdr defined in include/linux/ieee80211.h and
p54_common defined in drivers/net/wireless/p54/p54.h

This was done using Coccinelle (http://coccinelle.lip6.fr/).

Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

---
The semantic patch used is rather long and can be found in message 0 of
this patch series.

 drivers/net/wireless/p54/txrx.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/p54/txrx.c b/drivers/net/wireless/p54/txrx.c
index f95de0d..b7cc7c2 100644
--- a/drivers/net/wireless/p54/txrx.c
+++ b/drivers/net/wireless/p54/txrx.c
@@ -308,7 +308,7 @@ static void p54_pspoll_workaround(struct p54_common *priv, struct sk_buff *skb)
 		return;
 
 	/* only consider beacons from the associated BSSID */
-	if (!ether_addr_equal(hdr->addr3, priv->bssid))
+	if (!ether_addr_equal_64bits(hdr->addr3, priv->bssid))
 		return;
 
 	tim = p54_find_ie(skb, WLAN_EID_TIM);

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