[DCCP]: enable debug messages also for static builds

This patch
  * makes debugging (when configured) work both for static / module build
  * provides generic debugging macros for use in other DCCP / CCID modules
  * adds missing information about debug parameters to Kconfig
  * performs some code tidy-up

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
diff --git a/net/dccp/ccids/Kconfig b/net/dccp/ccids/Kconfig
index 8533dab..ba826d9 100644
--- a/net/dccp/ccids/Kconfig
+++ b/net/dccp/ccids/Kconfig
@@ -28,13 +28,20 @@
 	  This text was extracted from RFC 4340 (sec. 10.1),
 	  http://www.ietf.org/rfc/rfc4340.txt
 
+	  To compile this CCID as a module, choose M here: the module will be
+	  called dccp_ccid2.
+
 	  If in doubt, say M.
 
 config IP_DCCP_CCID2_DEBUG
-	  bool "CCID2 debug"
+	  bool "CCID2 debugging messages"
 	  depends on IP_DCCP_CCID2
 	  ---help---
-	    Enable CCID2 debug messages.
+	    Enable CCID2-specific debugging messages.
+
+	    When compiling CCID2 as a module, this debugging output can
+	    additionally be toggled by setting the ccid2_debug module
+	    parameter to 0 or 1.
 
 	    If in doubt, say N.
 
@@ -62,6 +69,9 @@
 	  This text was extracted from RFC 4340 (sec. 10.2),
 	  http://www.ietf.org/rfc/rfc4340.txt
 	  
+	  To compile this CCID as a module, choose M here: the module will be
+	  called dccp_ccid3.
+
 	  If in doubt, say M.
 
 config IP_DCCP_TFRC_LIB
diff --git a/net/dccp/ccids/ccid2.c b/net/dccp/ccids/ccid2.c
index 6533cb2..0fb0d66 100644
--- a/net/dccp/ccids/ccid2.c
+++ b/net/dccp/ccids/ccid2.c
@@ -33,18 +33,11 @@
 #include "../dccp.h"
 #include "ccid2.h"
 
+
+#ifdef CONFIG_IP_DCCP_CCID2_DEBUG
 static int ccid2_debug;
+#define ccid2_pr_debug(format, a...)	DCCP_PR_DEBUG(ccid2_debug, format, ##a)
 
-#ifdef CONFIG_IP_DCCP_CCID2_DEBUG
-#define ccid2_pr_debug(format, a...) \
-        do { if (ccid2_debug) \
-                printk(KERN_DEBUG "%s: " format, __FUNCTION__, ##a); \
-        } while (0)
-#else
-#define ccid2_pr_debug(format, a...)
-#endif
-
-#ifdef CONFIG_IP_DCCP_CCID2_DEBUG
 static void ccid2_hc_tx_check_sanity(const struct ccid2_hc_tx_sock *hctx)
 {
 	int len = 0;
@@ -86,7 +79,8 @@
 	BUG_ON(len != hctx->ccid2hctx_seqbufc * CCID2_SEQBUF_LEN);
 }
 #else
-#define ccid2_hc_tx_check_sanity(hctx) do {} while (0)
+#define ccid2_pr_debug(format, a...)
+#define ccid2_hc_tx_check_sanity(hctx)
 #endif
 
 static int ccid2_hc_tx_alloc_seq(struct ccid2_hc_tx_sock *hctx, int num,
@@ -841,8 +835,10 @@
 	.ccid_hc_rx_packet_recv	= ccid2_hc_rx_packet_recv,
 };
 
+#ifdef CONFIG_IP_DCCP_CCID2_DEBUG
 module_param(ccid2_debug, int, 0444);
 MODULE_PARM_DESC(ccid2_debug, "Enable debug messages");
+#endif
 
 static __init int ccid2_module_init(void)
 {