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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>
This commit is contained in:
Duan Jiong 2012-09-08 16:32:28 +00:00 committed by David S. Miller
parent 82346a7b6a
commit 6d57e9078e
1 changed files with 11 additions and 0 deletions
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11
include/linux/etherdevice.h
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@ -150,6 +150,17 @@ static inline void eth_broadcast_addr(u8 *addr)
memset(addr, 0xff, ETH_ALEN);
}
/**
* 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