[PATCH 2/2] netfilter: remove ELEMCOUNT

[lizf <lizf@cn.fujitsu.com>]

Hi,

Macro ELEMCOUNT is a duplicate of ARRAY_SIZE. What's worse is ELEMCOUNT
doesn't check the argument which ARRAY_SIZE does.

This patch should be applied after [PATCH 1/2], otherwise we'll get
compilation error due to the bug described in [PATCH 1/2].

Note this also fixes a bug in SCTP_CHUNKMAP_COPY(destmap, srcmap), in
which ELEMCOUNT(chunkmap) is called, and it should be ELEMCOUNT(srcmap).

diff --git a/include/linux/netfilter/xt_sctp.h b/include/linux/netfilter/xt_sctp.h
index b157897..dd5a4fd 100644
--- a/include/linux/netfilter/xt_sctp.h
+++ b/include/linux/netfilter/xt_sctp.h
@@ -7,9 +7,6 @@
 
 #define XT_SCTP_VALID_FLAGS		0x07
 
-#define ELEMCOUNT(x) (sizeof(x)/sizeof(x[0]))
-
-
 struct xt_sctp_flag_info {
 	u_int8_t chunktype;
 	u_int8_t flag;
@@ -59,21 +56,21 @@ struct xt_sctp_info {
 #define SCTP_CHUNKMAP_RESET(chunkmap) 				\
 	do {							\
 		int i; 						\
-		for (i = 0; i < ELEMCOUNT(chunkmap); i++)	\
+		for (i = 0; i < ARRAY_SIZE(chunkmap); i++)	\
 			chunkmap[i] = 0;			\
 	} while (0)
 
 #define SCTP_CHUNKMAP_SET_ALL(chunkmap) 			\
 	do {							\
 		int i; 						\
-		for (i = 0; i < ELEMCOUNT(chunkmap); i++) 	\
+		for (i = 0; i < ARRAY_SIZE(chunkmap); i++) 	\
 			chunkmap[i] = ~0;			\
 	} while (0)
 
 #define SCTP_CHUNKMAP_COPY(destmap, srcmap) 			\
 	do {							\
 		int i; 						\
-		for (i = 0; i < ELEMCOUNT(chunkmap); i++) 	\
+		for (i = 0; i < ARRAY_SIZE(srcmap); i++) 	\
 			destmap[i] = srcmap[i];			\
 	} while (0)
 
@@ -81,7 +78,7 @@ struct xt_sctp_info {
 ({							\
 	int i; 						\
 	int flag = 1;					\
-	for (i = 0; i < ELEMCOUNT(chunkmap); i++) {	\
+	for (i = 0; i < ARRAY_SIZE(chunkmap); i++) {	\
 		if (chunkmap[i]) {			\
 			flag = 0;			\
 			break;				\
@@ -94,7 +91,7 @@ struct xt_sctp_info {
 ({							\
 	int i; 						\
 	int flag = 1;					\
-	for (i = 0; i < ELEMCOUNT(chunkmap); i++) {	\
+	for (i = 0; i < ARRAY_SIZE(chunkmap); i++) {	\
 		if (chunkmap[i] != ~0) {		\
 			flag = 0;			\
 				break;			\