[IPV4] ip_options.c: kmalloc + memset conversion to kzalloc

Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/ip_options.c b/net/ipv4/ip_options.c
index 25134682..2f14745 100644
--- a/net/ipv4/ip_options.c
+++ b/net/ipv4/ip_options.c
@@ -513,11 +513,8 @@
 
 static struct ip_options *ip_options_get_alloc(const int optlen)
 {
-	struct ip_options *opt = kmalloc(sizeof(*opt) + ((optlen + 3) & ~3),
-					 GFP_KERNEL);
-	if (opt)
-		memset(opt, 0, sizeof(*opt));
-	return opt;
+	return kzalloc(sizeof(struct ip_options) + ((optlen + 3) & ~3),
+		       GFP_KERNEL);
 }
 
 static int ip_options_get_finish(struct ip_options **optp,