net: convert BUG_TRAP to generic WARN_ON

Removes legacy reinvent-the-wheel type thing. The generic
machinery integrates much better to automated debugging aids
such as kerneloops.org (and others), and is unambiguous due to
better naming. Non-intuively BUG_TRAP() is actually equal to
WARN_ON() rather than BUG_ON() though some might actually be
promoted to BUG_ON() but I left that to future.

I could make at least one BUILD_BUG_ON conversion.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/datagram.c b/net/core/datagram.c
index 8a28fc9..dd61dca 100644
--- a/net/core/datagram.c
+++ b/net/core/datagram.c
@@ -285,7 +285,7 @@
 	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
 		int end;
 
-		BUG_TRAP(start <= offset + len);
+		WARN_ON(start > offset + len);
 
 		end = start + skb_shinfo(skb)->frags[i].size;
 		if ((copy = end - offset) > 0) {
@@ -315,7 +315,7 @@
 		for (; list; list = list->next) {
 			int end;
 
-			BUG_TRAP(start <= offset + len);
+			WARN_ON(start > offset + len);
 
 			end = start + list->len;
 			if ((copy = end - offset) > 0) {
@@ -366,7 +366,7 @@
 	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
 		int end;
 
-		BUG_TRAP(start <= offset + len);
+		WARN_ON(start > offset + len);
 
 		end = start + skb_shinfo(skb)->frags[i].size;
 		if ((copy = end - offset) > 0) {
@@ -402,7 +402,7 @@
 		for (; list; list=list->next) {
 			int end;
 
-			BUG_TRAP(start <= offset + len);
+			WARN_ON(start > offset + len);
 
 			end = start + list->len;
 			if ((copy = end - offset) > 0) {