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/skbuff.c b/net/core/skbuff.c
index e411567..4e0c922 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1200,7 +1200,7 @@
 	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) {
@@ -1229,7 +1229,7 @@
 		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) {
@@ -1475,7 +1475,7 @@
 		skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
 		int end;
 
-		BUG_TRAP(start <= offset + len);
+		WARN_ON(start > offset + len);
 
 		end = start + frag->size;
 		if ((copy = end - offset) > 0) {
@@ -1503,7 +1503,7 @@
 		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) {
@@ -1552,7 +1552,7 @@
 	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) {
@@ -1581,7 +1581,7 @@
 		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) {
@@ -1629,7 +1629,7 @@
 	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) {
@@ -1662,7 +1662,7 @@
 			__wsum csum2;
 			int end;
 
-			BUG_TRAP(start <= offset + len);
+			WARN_ON(start > offset + len);
 
 			end = start + list->len;
 			if ((copy = end - offset) > 0) {
@@ -2373,7 +2373,7 @@
 	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) {
@@ -2397,7 +2397,7 @@
 		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) {