=====================================================================
OpenSolaris compatibility headers
---------------------------------------------------------------------
--- /u/freebsd/head/src/sys/cddl/compat/opensolaris/kern/opensolaris_kmem.c	2008-05-24 14:05:11.000000000 +1000
+++ /u/p4/dtrace/src/sys/cddl/compat/opensolaris/kern/opensolaris_kmem.c	2008-04-19 16:58:58.000000000 +1000
@@ -40,6 +40,8 @@
 #include <vm/vm_kern.h>
 #include <vm/vm_map.h>
 
+#define KMEM_DEBUG
+
 #ifdef KMEM_DEBUG
 #include <sys/queue.h>
 #include <sys/stack.h>
@@ -93,6 +95,10 @@
 zfs_kmem_free(void *buf, size_t size __unused)
 {
 #ifdef KMEM_DEBUG
+	if (buf == NULL) {
+		printf("%s: attempt to free NULL\n",__func__);
+		return;
+	}
 	struct kmem_item *i;
 
 	buf = (u_char *)buf - sizeof(struct kmem_item);
@@ -236,7 +242,8 @@
 }
 
 #ifdef KMEM_DEBUG
-static void
+void kmem_show(void *);
+void
 kmem_show(void *dummy __unused)
 {
 	struct kmem_item *i;
@@ -248,12 +255,10 @@
 		printf("KMEM_DEBUG: Leaked elements:\n\n");
 		LIST_FOREACH(i, &kmem_items, next) {
 			printf("address=%p\n", i);
-			stack_print(&i->stack);
-			printf("\n");
 		}
 	}
 	mtx_unlock(&kmem_items_mtx);
 }
 
-SYSUNINIT(sol_kmem, SI_SUB_DRIVERS, SI_ORDER_FIRST, kmem_show, NULL);
+SYSUNINIT(sol_kmem, SI_SUB_CPU, SI_ORDER_FIRST, kmem_show, NULL);
 #endif	/* KMEM_DEBUG */