route: Mark unused route cache flags as such.

Also removes an obsolete check for the unused flag RTCF_MASQ.
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/in_route.h

@@ -10,19 +10,19 @@
 #define RTCF_NOPMTUDISC RTM_F_NOPMTUDISC
 
 #define RTCF_NOTIFY	0x00010000
-#define RTCF_DIRECTDST	0x00020000
+#define RTCF_DIRECTDST	0x00020000 /* unused */
 #define RTCF_REDIRECTED	0x00040000
-#define RTCF_TPROXY	0x00080000
+#define RTCF_TPROXY	0x00080000 /* unused */
 
-#define RTCF_FAST	0x00200000
-#define RTCF_MASQ	0x00400000
-#define RTCF_SNAT	0x00800000
+#define RTCF_FAST	0x00200000 /* unused */
+#define RTCF_MASQ	0x00400000 /* unused */
+#define RTCF_SNAT	0x00800000 /* unused */
 #define RTCF_DOREDIRECT 0x01000000
 #define RTCF_DIRECTSRC	0x04000000
 #define RTCF_DNAT	0x08000000
 #define RTCF_BROADCAST	0x10000000
 #define RTCF_MULTICAST	0x20000000
-#define RTCF_REJECT	0x40000000
+#define RTCF_REJECT	0x40000000 /* unused */
 #define RTCF_LOCAL	0x80000000
 
 #define RTCF_NAT	(RTCF_DNAT|RTCF_SNAT)

net/ipv4/route.c

@@ -1792,7 +1792,7 @@ static int __mkroute_input(struct sk_buff *skb,
 	if (err)
 		flags |= RTCF_DIRECTSRC;
 
-	if (out_dev == in_dev && err && !(flags & RTCF_MASQ) &&
+	if (out_dev == in_dev && err &&
 	    (IN_DEV_SHARED_MEDIA(out_dev) ||
 	     inet_addr_onlink(out_dev, saddr, FIB_RES_GW(*res))))
 		flags |= RTCF_DOREDIRECT;