xfrm: Convert xfrm_addr_cmp() to boolean xfrm_addr_equal().

All users of xfrm_addr_cmp() use its result as boolean.
Introduce xfrm_addr_equal() (which is equal to !xfrm_addr_cmp())
and convert all users.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 07c5857..6c9aa64 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -2786,10 +2786,10 @@
 {
 	if (sel_cmp->proto == IPSEC_ULPROTO_ANY) {
 		if (sel_tgt->family == sel_cmp->family &&
-		    xfrm_addr_cmp(&sel_tgt->daddr, &sel_cmp->daddr,
-				  sel_cmp->family) == 0 &&
-		    xfrm_addr_cmp(&sel_tgt->saddr, &sel_cmp->saddr,
-				  sel_cmp->family) == 0 &&
+		    xfrm_addr_equal(&sel_tgt->daddr, &sel_cmp->daddr,
+				    sel_cmp->family) &&
+		    xfrm_addr_equal(&sel_tgt->saddr, &sel_cmp->saddr,
+				    sel_cmp->family) &&
 		    sel_tgt->prefixlen_d == sel_cmp->prefixlen_d &&
 		    sel_tgt->prefixlen_s == sel_cmp->prefixlen_s) {
 			return true;
@@ -2847,10 +2847,10 @@
 		switch (t->mode) {
 		case XFRM_MODE_TUNNEL:
 		case XFRM_MODE_BEET:
-			if (xfrm_addr_cmp(&t->id.daddr, &m->old_daddr,
-					  m->old_family) == 0 &&
-			    xfrm_addr_cmp(&t->saddr, &m->old_saddr,
-					  m->old_family) == 0) {
+			if (xfrm_addr_equal(&t->id.daddr, &m->old_daddr,
+					    m->old_family) &&
+			    xfrm_addr_equal(&t->saddr, &m->old_saddr,
+					    m->old_family)) {
 				match = 1;
 			}
 			break;
@@ -2916,10 +2916,10 @@
 		return -EINVAL;
 
 	for (i = 0; i < num_migrate; i++) {
-		if ((xfrm_addr_cmp(&m[i].old_daddr, &m[i].new_daddr,
-				   m[i].old_family) == 0) &&
-		    (xfrm_addr_cmp(&m[i].old_saddr, &m[i].new_saddr,
-				   m[i].old_family) == 0))
+		if (xfrm_addr_equal(&m[i].old_daddr, &m[i].new_daddr,
+				    m[i].old_family) &&
+		    xfrm_addr_equal(&m[i].old_saddr, &m[i].new_saddr,
+				    m[i].old_family))
 			return -EINVAL;
 		if (xfrm_addr_any(&m[i].new_daddr, m[i].new_family) ||
 		    xfrm_addr_any(&m[i].new_saddr, m[i].new_family))