diff --git a/libitm/ChangeLog b/libitm/ChangeLog
index decdad3c68c..130c9efbd85 100644
--- a/libitm/ChangeLog
+++ b/libitm/ChangeLog
@@ -1,3 +1,8 @@
+2012-02-14  Torvald Riegel  <triegel@redhat.com>
+
+	* util.cc (GTM::xcalloc): New.
+	* common.h (GTM::xcalloc): Declare.
+
 2012-02-14  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* config/sparc/target.h (cpu_relax): Read from CC register.
diff --git a/libitm/common.h b/libitm/common.h
index 14d0efb40ba..b1ef2d4e63a 100644
--- a/libitm/common.h
+++ b/libitm/common.h
@@ -54,6 +54,8 @@ namespace GTM HIDDEN {
 // cache lines that are not shared with any object used by another thread.
 extern void * xmalloc (size_t s, bool separate_cl = false)
   __attribute__((malloc, nothrow));
+extern void * xcalloc (size_t s, bool separate_cl = false)
+  __attribute__((malloc, nothrow));
 extern void * xrealloc (void *p, size_t s, bool separate_cl = false)
   __attribute__((malloc, nothrow));
 
diff --git a/libitm/util.cc b/libitm/util.cc
index afd37e41731..48a1bf88d7c 100644
--- a/libitm/util.cc
+++ b/libitm/util.cc
@@ -70,6 +70,18 @@ xmalloc (size_t size, bool separate_cl)
   return r;
 }
 
+void *
+xcalloc (size_t size, bool separate_cl)
+{
+  // TODO Use posix_memalign if separate_cl is true, or some other allocation
+  // method that will avoid sharing cache lines with data used by other
+  // threads.
+  void *r = calloc (1, size);
+  if (r == 0)
+    GTM_fatal ("Out of memory allocating %lu bytes", (unsigned long) size);
+  return r;
+}
+
 void *
 xrealloc (void *old, size_t size, bool separate_cl)
 {