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-rw-r--r--sysdeps/microblaze/atomic-machine.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/sysdeps/microblaze/atomic-machine.h b/sysdeps/microblaze/atomic-machine.h
index dc5309c430..d73c69d46b 100644
--- a/sysdeps/microblaze/atomic-machine.h
+++ b/sysdeps/microblaze/atomic-machine.h
@@ -38,6 +38,9 @@ typedef uintmax_t uatomic_max_t;
 #define __HAVE_64B_ATOMICS 0
 #define USE_ATOMIC_COMPILER_BUILTINS 0
 
+/* XXX Is this actually correct?  */
+#define ATOMIC_EXCHANGE_USES_CAS 1
+
 
 /* Microblaze does not have byte and halfword forms of load and reserve and
    store conditional. So for microblaze we stub out the 8- and 16-bit forms.  */