From ba91431154ad7bac82ddf0a540ec1b40db62d782 Mon Sep 17 00:00:00 2001 From: Tom Gundersen Date: Thu, 30 Jan 2014 17:23:34 +0100 Subject: [PATCH] shared: net - use u32ctz to compute prefixlen --- src/shared/net-util.c | 11 +---------- 1 file changed, 1 insertion(+), 10 deletions(-) diff --git a/src/shared/net-util.c b/src/shared/net-util.c index 630be18e5..ba21ae437 100644 --- a/src/shared/net-util.c +++ b/src/shared/net-util.c @@ -59,18 +59,9 @@ bool net_match_config(const struct ether_addr *match_mac, } unsigned net_netmask_to_prefixlen(const struct in_addr *addr) { - unsigned len = 0; - uint32_t mask; - assert(addr); - mask = be32toh(addr->s_addr); - while (mask) { - len++; - mask = mask << 1; - } - - return len; + return 32 - u32ctz(be32toh(addr->s_addr)); } int config_parse_ifname(const char *unit, -- 2.30.2