netdev - [PATCH] etherdevice: introduce eth_broadcast

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Date:	Tue, 10 Jul 2012 18:18:44 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, linux-wireless@...r.kernel.org
Subject: [PATCH] etherdevice: introduce eth_broadcast_addr

From: Johannes Berg <johannes.berg@...el.com>

A lot of code has either the memset or an inefficient copy
from a static array that contains the all-ones broadcast
address. Introduce eth_broadcast_addr() to fill an address
with all ones, making the code clearer and allowing us to
get rid of some constant arrays.

Signed-off-by: Johannes Berg <johannes.berg@...el.com>
---
 include/linux/etherdevice.h |   11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h
index 3d406e0..98a27cc 100644
--- a/include/linux/etherdevice.h
+++ b/include/linux/etherdevice.h
@@ -138,6 +138,17 @@ static inline void random_ether_addr(u8 *addr)
 }
 
 /**
+ * eth_broadcast_addr - Assign broadcast address
+ * @addr: Pointer to a six-byte array containing the Ethernet address
+ *
+ * Assign the broadcast address to the given address array.
+ */
+static inline void eth_broadcast_addr(u8 *addr)
+{
+	memset(addr, 0xff, ETH_ALEN);
+}
+
+/**
  * eth_hw_addr_random - Generate software assigned random Ethernet and
  * set device flag
  * @dev: pointer to net_device structure
-- 
1.7.10.4



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