[DCCP]: Miscellaneous code tidy-ups

This patch does not change code; it performs some trivial clean/tidy-ups:

  * removal of a `debug_prefix' string in favour of the
    already existing dccp_role(sk)

  * add documentation of structures and constants

  * separated out the cases for invalid packets (step 1
    of the packet validation)

  * removing duplicate statements

  * combining declaration & initialisation

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/net/dccp/output.c b/net/dccp/output.c
index ef22f3cc791a..c34eada7f025 100644
--- a/net/dccp/output.c
+++ b/net/dccp/output.c
@@ -333,6 +333,7 @@ struct sk_buff *dccp_make_response(struct sock *sk, struct dst_entry *dst,
                 return NULL;
         }
 
+        /* Build and checksum header */
         dh = dccp_zeroed_hdr(skb, dccp_header_size);
 
         dh->dccph_sport = inet_sk(sk)->sport;