From 2407534f8be8015d585104bcc4374870b6b70fe7 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Tue, 1 Nov 2005 16:52:11 -0800 Subject: [PATCH] [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 Signed-off-by: Arnaldo Carvalho de Melo --- include/linux/etherdevice.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h index cc84934f90..17460c85df 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; } /** -- 2.39.5