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authorDuan Jiong <djduanjiong@gmail.com>2012-09-08 20:32:28 +0400
committerDavid S. Miller <davem@davemloft.net>2012-09-10 23:49:54 +0400
commit6d57e9078e880a3dd232d579f42ac437a8f1ef7b (patch)
tree201dfec28dcc0d4c7fb4389ef0a0c57140e3f732 /include/linux/etherdevice.h
parent82346a7b6a14793a48cc7a0692a007daf0843f99 (diff)
downloadlinux-6d57e9078e880a3dd232d579f42ac437a8f1ef7b.tar.xz
etherdevice: introduce help function eth_zero_addr()
a lot of code has either the memset or an inefficient copy from a static array that contains the all-zeros Ethernet address. Introduce help function eth_zero_addr() to fill an address with all zeros, making the code clearer and allowing us to get rid of some constant arrays. Signed-off-by: Duan Jiong <djduanjiong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/etherdevice.h')
-rw-r--r--include/linux/etherdevice.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h
index d426336d92d9..b006ba0a9f42 100644
--- a/include/linux/etherdevice.h
+++ b/include/linux/etherdevice.h
@@ -151,6 +151,17 @@ static inline void eth_broadcast_addr(u8 *addr)
}
/**
+ * eth_zero_addr - Assign zero address
+ * @addr: Pointer to a six-byte array containing the Ethernet address
+ *
+ * Assign the zero address to the given address array.
+ */
+static inline void eth_zero_addr(u8 *addr)
+{
+ memset(addr, 0x00, ETH_ALEN);
+}
+
+/**
* eth_hw_addr_random - Generate software assigned random Ethernet and
* set device flag
* @dev: pointer to net_device structure