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| author |   Stephen Hemminger <shemminger@osdl.org> | 2005-11-01 16:52:11 -0800 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@mandriva.com> | 2005-11-02 21:54:07 -0200 |
| commit | 2407534f8be8015d585104bcc4374870b6b70fe7 (patch) | |
| tree | fba7cb22827991ccf447824a6b2d66a543b27e21 /include/linux/etherdevice.h | |
| parent | [TCP]: BIC max increment too large (diff) | |
| download | linux-dev-2407534f8be8015d585104bcc4374870b6b70fe7.tar.xz linux-dev-2407534f8be8015d585104bcc4374870b6b70fe7.zip | |
[ETHERNET]: Optimize is_broadcast_ether_addr
Optimize the match for broadcast address by using bit operations instead
of comparison. This saves a number of conditional branches, and generates
smaller code.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Diffstat (limited to 'include/linux/etherdevice.h')
| -rw-r--r-- | include/linux/etherdevice.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h index cc84934f9059..17460c85df7b 100644 --- a/include/linux/etherdevice.h +++ b/include/linux/etherdevice.h @@ -71,8 +71,7 @@ static inline int is_multicast_ether_addr(const u8 *addr) static inline int is_broadcast_ether_addr(const u8 *addr) { - return ((addr[0] == 0xff) && (addr[1] == 0xff) && (addr[2] == 0xff) && - (addr[3] == 0xff) && (addr[4] == 0xff) && (addr[5] == 0xff)); + return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == 0xff; } /** |