net: annotate inet_timewait_sock bitfields

The use of bitfields here would lead to false positive warnings with
kmemcheck. Silence them.

(Additionally, one erroneous comment related to the bitfield was also
fixed.)

Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>

net/ipv4/inet_timewait_sock.c

@@ -9,6 +9,7 @@
  */
 
 #include <linux/kernel.h>
+#include <linux/kmemcheck.h>
 #include <net/inet_hashtables.h>
 #include <net/inet_timewait_sock.h>
 #include <net/ip.h>
@@ -117,6 +118,8 @@ struct inet_timewait_sock *inet_twsk_alloc(const struct sock *sk, const int stat
 	if (tw != NULL) {
 		const struct inet_sock *inet = inet_sk(sk);
 
+		kmemcheck_annotate_bitfield(tw, flags);
+
 		/* Give us an identity. */
 		tw->tw_daddr	    = inet->daddr;
 		tw->tw_rcv_saddr    = inet->rcv_saddr;