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| author | Duan Jiong <djduanjiong@gmail.com> | 2012-09-08 16:32:28 +0000 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2016-08-22 22:37:17 +0100 |
| commit | 4c751e9d1fdd725feaa8d83e5680dbec3f1f7178 (patch) | |
| tree | 5dc1fb99a0945e0bcbb293f5a2dd7fa44129d726 | |
| parent | faaea5c5f2bb1266ea35a1dcbe0b685f826f6637 (diff) | |
| download | linux-stable-4c751e9d1fdd725feaa8d83e5680dbec3f1f7178.tar.gz linux-stable-4c751e9d1fdd725feaa8d83e5680dbec3f1f7178.tar.bz2 linux-stable-4c751e9d1fdd725feaa8d83e5680dbec3f1f7178.zip | |
etherdevice: introduce help function eth_zero_addr()
commit 6d57e9078e880a3dd232d579f42ac437a8f1ef7b upstream.
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>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | include/linux/etherdevice.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h index 05955cf09937..4d29153aa4ee 100644 --- a/include/linux/etherdevice.h +++ b/include/linux/etherdevice.h @@ -140,6 +140,17 @@ static inline void random_ether_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); +} + +/** * dev_hw_addr_random - Create random MAC and set device flag * @dev: pointer to net_device structure * @hwaddr: Pointer to a six-byte array containing the Ethernet address |