dccp: Lockless integration of CCID congestion-control plugins

Based on Arnaldo's earlier patch, this patch integrates the standardised
CCID congestion control plugins (CCID-2 and CCID-3) of DCCP with dccp.ko:

 * enables a faster connection path by eliminating the need to always go 
   through the CCID registration lock;

 * updates the implementation to use only a single array whose size equals
   the number of configured CCIDs instead of the maximum (256);

 * since the CCIDs are now fixed array elements, synchronization is no
   longer needed, simplifying use and implementation.

CCID-2 is suggested as minimum for a basic DCCP implementation (RFC 4340, 10);
CCID-3 is a standards-track CCID supported by RFC 4342 and RFC 5348.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 4 deletions

diff --git a/net/dccp/Kconfig b/net/dccp/Kconfig
index 7aa2a7acc7ec..ad6dffd9070e 100644
--- a/net/dccp/Kconfig
+++ b/net/dccp/Kconfig
@@ -1,7 +1,6 @@
 menuconfig IP_DCCP
         tristate "The DCCP Protocol (EXPERIMENTAL)"
         depends on INET && EXPERIMENTAL
-        select IP_DCCP_CCID2
         ---help---
           Datagram Congestion Control Protocol (RFC 4340)
 
@@ -25,9 +24,6 @@ config INET_DCCP_DIAG
         def_tristate y if (IP_DCCP = y && INET_DIAG = y)
         def_tristate m
 
-config IP_DCCP_ACKVEC
-        bool
-
 source "net/dccp/ccids/Kconfig"
 
 menu "DCCP Kernel Hacking"