5045 use atomic_{inc,dec}_* instead of atomic_add_*

@@ -11774,11 +11774,11 @@
 static void
 ipif_assign_seqid(ipif_t *ipif)
 {
         ip_stack_t      *ipst = ipif->ipif_ill->ill_ipst;
 
-        ipif->ipif_seqid = atomic_add_64_nv(&ipst->ips_ipif_g_seqid, 1);
+        ipif->ipif_seqid = atomic_inc_64_nv(&ipst->ips_ipif_g_seqid);
 }
 
 /*
  * Clone the contents of `sipif' to `dipif'.  Requires that both ipifs are
  * administratively down (i.e., no DAD), of the same type, and locked.  Note

@@ -12447,13 +12447,13 @@
  */
 void
 ip_update_source_selection(ip_stack_t *ipst)
 {
         /* We skip past SRC_GENERATION_VERIFY */
-        if (atomic_add_32_nv(&ipst->ips_src_generation, 1) ==
+        if (atomic_inc_32_nv(&ipst->ips_src_generation) ==
             SRC_GENERATION_VERIFY)
-                atomic_add_32(&ipst->ips_src_generation, 1);
+                atomic_inc_32(&ipst->ips_src_generation);
 }
 
 /*
  * Finish the group join started in ip_sioctl_groupname().
  */