linux-kernel - Re: [PATCH 6/11] rtlwifi: use ether_addr_equal

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Message-ID: <52C1E0DF.2000800@lwfinger.net>
Date:	Mon, 30 Dec 2013 15:08:47 -0600
From:	Larry Finger <Larry.Finger@...inger.net>
To:	Julia Lawall <Julia.Lawall@...6.fr>
CC:	kernel-janitors@...r.kernel.org,
	Chaoming Li <chaoming_li@...lsil.com.cn>,
	"John W. Linville" <linville@...driver.com>,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/11] rtlwifi: use ether_addr_equal_64bits

On 12/30/2013 12:15 PM, Julia Lawall wrote:
> 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
> rtl_mac defined in drivers/net/wireless/rtlwifi/wifi.h
>
> This was done using Coccinelle (http://coccinelle.lip6.fr/).
>
> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

Acked-by: Larry Finger <Larry.Finger@...inger.net>

Larry


>
> ---
> The semantic patch used is rather long and can be found in message 0 of
> this patch series.
>
>   drivers/net/wireless/rtlwifi/base.c |    4 ++--
>   drivers/net/wireless/rtlwifi/ps.c   |    4 ++--
>   2 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/net/wireless/rtlwifi/ps.c b/drivers/net/wireless/rtlwifi/ps.c
> index 0d81f76..deedae3 100644
> --- a/drivers/net/wireless/rtlwifi/ps.c
> +++ b/drivers/net/wireless/rtlwifi/ps.c
> @@ -478,7 +478,7 @@ void rtl_swlps_beacon(struct ieee80211_hw *hw, void *data, unsigned int len)
>   		return;
>
>   	/* and only beacons from the associated BSSID, please */
> -	if (!ether_addr_equal(hdr->addr3, rtlpriv->mac80211.bssid))
> +	if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
>   		return;
>
>   	rtlpriv->psc.last_beacon = jiffies;
> @@ -923,7 +923,7 @@ void rtl_p2p_info(struct ieee80211_hw *hw, void *data, unsigned int len)
>   		return;
>
>   	/* and only beacons from the associated BSSID, please */
> -	if (!ether_addr_equal(hdr->addr3, rtlpriv->mac80211.bssid))
> +	if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
>   		return;
>
>   	/* check if this really is a beacon */
> diff --git a/drivers/net/wireless/rtlwifi/base.c b/drivers/net/wireless/rtlwifi/base.c
> index fcf9b62..d63a12c 100644
> --- a/drivers/net/wireless/rtlwifi/base.c
> +++ b/drivers/net/wireless/rtlwifi/base.c
> @@ -1293,7 +1293,7 @@ void rtl_beacon_statistic(struct ieee80211_hw *hw, struct sk_buff *skb)
>   		return;
>
>   	/* and only beacons from the associated BSSID, please */
> -	if (!ether_addr_equal(hdr->addr3, rtlpriv->mac80211.bssid))
> +	if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
>   		return;
>
>   	rtlpriv->link_info.bcn_rx_inperiod++;
> @@ -1781,7 +1781,7 @@ void rtl_recognize_peer(struct ieee80211_hw *hw, u8 *data, unsigned int len)
>   		return;
>
>   	/* and only beacons from the associated BSSID, please */
> -	if (!ether_addr_equal(hdr->addr3, rtlpriv->mac80211.bssid))
> +	if (!ether_addr_equal_64bits(hdr->addr3, rtlpriv->mac80211.bssid))
>   		return;
>
>   	if (rtl_find_221_ie(hw, data, len))
>
>

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