sctp: remove the typedef sctp_cwrhdr_t

This patch is to remove the typedef sctp_cwrhdr_t, and
replace with struct sctp_cwrhdr in the places where it's
using this typedef.

It is also to use sizeof(variable) instead of sizeof(type).
Signed-off-by: NXin Long <lucien.xin@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/linux/sctp.h

@@ -531,13 +531,13 @@ struct sctp_ecne_chunk {
 /* RFC 2960.  Appendix A.  Explicit Congestion Notification.
  *   Congestion Window Reduced (CWR) (13)
  */
-typedef struct sctp_cwrhdr {
+struct sctp_cwrhdr {
 	__be32 lowest_tsn;
-} sctp_cwrhdr_t;
+};
 
 typedef struct sctp_cwr_chunk {
 	struct sctp_chunkhdr chunk_hdr;
-	sctp_cwrhdr_t cwr_hdr;
+	struct sctp_cwrhdr cwr_hdr;
 } sctp_cwr_chunk_t;
 
 /* PR-SCTP

net/sctp/sm_make_chunk.c

@@ -663,11 +663,11 @@ struct sctp_chunk *sctp_make_cwr(const struct sctp_association *asoc,
 			    const struct sctp_chunk *chunk)
 {
 	struct sctp_chunk *retval;
-	sctp_cwrhdr_t cwr;
+	struct sctp_cwrhdr cwr;
 
 	cwr.lowest_tsn = htonl(lowest_tsn);
 	retval = sctp_make_control(asoc, SCTP_CID_ECN_CWR, 0,
-				   sizeof(sctp_cwrhdr_t), GFP_ATOMIC);
+				   sizeof(cwr), GFP_ATOMIC);
 
 	if (!retval)
 		goto nodata;

net/sctp/sm_statefuns.c

@@ -2862,8 +2862,8 @@ sctp_disposition_t sctp_sf_do_ecn_cwr(struct net *net,
 				      void *arg,
 				      sctp_cmd_seq_t *commands)
 {
-	sctp_cwrhdr_t *cwr;
 	struct sctp_chunk *chunk = arg;
+	struct sctp_cwrhdr *cwr;
 	u32 lowest_tsn;
 
 	if (!sctp_vtag_verify(chunk, asoc))
@@ -2873,8 +2873,8 @@ sctp_disposition_t sctp_sf_do_ecn_cwr(struct net *net,
 		return sctp_sf_violation_chunklen(net, ep, asoc, type, arg,
 						  commands);
 
-	cwr = (sctp_cwrhdr_t *) chunk->skb->data;
-	skb_pull(chunk->skb, sizeof(sctp_cwrhdr_t));
+	cwr = (struct sctp_cwrhdr *)chunk->skb->data;
+	skb_pull(chunk->skb, sizeof(*cwr));
 
 	lowest_tsn = ntohl(cwr->lowest_tsn);