urcu-bp: don't copy old region upon mremap

[urcu.git] / urcu-bp.c

diff --git a/urcu-bp.c b/urcu-bp.c
index 203642cbede2b70c597875d3646f9a4e87027bf9..2973574436b7977e491df3a6634e5c99d2ea2a85 100644 (file)
--- a/urcu-bp.c
+++ b/urcu-bp.c
@@ -41,6 +41,10 @@
 /* Do not #define _LGPL_SOURCE to ensure we can emit the wrapper symbols */
 #include "urcu-bp.h"
 
+#ifndef MAP_ANONYMOUS
+#define MAP_ANONYMOUS MAP_ANON
+#endif
+
 /* Sleep delay in us */
 #define RCU_SLEEP_DELAY                1000
 #define ARENA_INIT_ALLOC       16
@@ -250,7 +254,6 @@ static void resize_arena(struct registry_arena *arena, size_t len)
        if (new_arena == arena->p)
                return;
 
-       memcpy(new_arena, arena->p, arena->len);
        bzero(new_arena + arena->len, len - arena->len);
        arena->p = new_arena;
 }