ioctl(SIOCGIFINDEX) does not require clearing of entire ifr

function                                             old     new   delta
INET6_setroute                                       492     472     -20
do_iplink                                           1357    1330     -27
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-47)             Total: -47 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

3 files changed, 3 insertions, 3 deletions

diff --git a/networking/libiproute/iplink.c b/networking/libiproute/iplink.c
index 2aa8b683b..9c164a71d 100644
--- a/networking/libiproute/iplink.c
+++ b/networking/libiproute/iplink.c
@@ -161,7 +161,7 @@ static int get_address(char *dev, int *htype)
 
         s = xsocket(PF_PACKET, SOCK_DGRAM, 0);
 
-        memset(&ifr, 0, sizeof(ifr));
+        /*memset(&ifr, 0, sizeof(ifr)); - SIOCGIFINDEX does not need to clear all */
         strncpy_IFNAMSIZ(ifr.ifr_name, dev);
         xioctl(s, SIOCGIFINDEX, &ifr);
 
diff --git a/networking/route.c b/networking/route.c
index 6edc0f6d7..8387ce1bb 100644
--- a/networking/route.c
+++ b/networking/route.c
@@ -444,7 +444,7 @@ static NOINLINE void INET6_setroute(int action, char **args)
 
         if (devname) {
                 struct ifreq ifr;
-                memset(&ifr, 0, sizeof(ifr));
+                /*memset(&ifr, 0, sizeof(ifr)); - SIOCGIFINDEX does not need to clear all */
                 strncpy_IFNAMSIZ(ifr.ifr_name, devname);
                 xioctl(skfd, SIOCGIFINDEX, &ifr);
                 rt.rtmsg_ifindex = ifr.ifr_ifindex;
diff --git a/networking/udhcp/d6_socket.c b/networking/udhcp/d6_socket.c
index 315c8d98a..6ad53a9c2 100644
--- a/networking/udhcp/d6_socket.c
+++ b/networking/udhcp/d6_socket.c
@@ -63,7 +63,7 @@ int FAST_FUNC d6_read_interface(const char *interface, int *ifindex, struct in6_
                 struct ifreq ifr;
                 int fd;
 
-                memset(&ifr, 0, sizeof(ifr));
+                /*memset(&ifr, 0, sizeof(ifr)); - SIOCGIFINDEX does not need to clear all */
                 strncpy_IFNAMSIZ(ifr.ifr_name, interface);
                 fd = xsocket(AF_INET6, SOCK_RAW, IPPROTO_RAW);
                 if (ioctl(fd, SIOCGIFINDEX, &ifr) == 0) {