3 files changed, 4 insertions, 5 deletions
diff --git a/erts/emulator/beam/erl_ao_firstfit_alloc.c b/erts/emulator/beam/erl_ao_firstfit_alloc.c
index fbe4724047..7e239d1f5d 100644
--- a/erts/emulator/beam/erl_ao_firstfit_alloc.c
+++ b/erts/emulator/beam/erl_ao_firstfit_alloc.c
@@ -123,7 +123,7 @@ struct AOFF_Carrier_t_ {
     AOFF_RBTree_t rbt_node;     /* My node in the carrier tree */
     AOFF_RBTree_t* root;        /* Root of my block tree */
 };
-#define RBT_NODE_TO_MBC(PTR) ((AOFF_Carrier_t*)((char*)(PTR) - offsetof(AOFF_Carrier_t, rbt_node)))
+#define RBT_NODE_TO_MBC(PTR) ErtsContainerStruct((PTR), AOFF_Carrier_t, rbt_node)
 
 /* 
    To support carrier migration we keep two kinds of rb-trees:
diff --git a/erts/emulator/beam/export.c b/erts/emulator/beam/export.c
index 02c24557c1..2a19211987 100644
--- a/erts/emulator/beam/export.c
+++ b/erts/emulator/beam/export.c
@@ -31,7 +31,7 @@
 #define EXPORT_INITIAL_SIZE   4000
 #define EXPORT_LIMIT  (512*1024)
 
-#define EXPORT_HASH(m,f,a) ((m)*(f)+(a))
+#define EXPORT_HASH(m,f,a) ((atom_val(m) * atom_val(f)) ^ (a))
 
 #ifdef DEBUG
 #  define IF_DEBUG(x) x
@@ -79,8 +79,7 @@ struct export_templ
 
 static struct export_blob* entry_to_blob(struct export_entry* ee)
 {
-    return (struct export_blob*)
-        ((char*)ee->ep - offsetof(struct export_blob,exp));
+    return ErtsContainerStruct(ee->ep, struct export_blob, exp);
 }
 
 void
diff --git a/erts/emulator/beam/sys.h b/erts/emulator/beam/sys.h
index f303d4f167..9a205d50d3 100644
--- a/erts/emulator/beam/sys.h
+++ b/erts/emulator/beam/sys.h
@@ -97,7 +97,7 @@
     ((UWord)((char*)(ptr) - (char*)(start)) < (nbytes))
 
 #define ErtsContainerStruct(ptr, type, member) \
-  (type *)((char *)(1 ? (ptr) : &((type *)0)->member) - offsetof(type, member))
+    ((type *)((char *)(1 ? (ptr) : &((type *)0)->member) - offsetof(type, member)))
 
 #if defined (__WIN32__)
 #  include "erl_win_sys.h"