runtime: Fix use of __atomic_compare_exchange_n: not weak, consistent.

From-SVN: r193581

diff --git a/libgo/runtime/runtime.h b/libgo/runtime/runtime.h
index 6edeae5f9d9d48bdf2541cda83e66a64d06e0189..fb89a829ad65a2e48445c1e2ce1792947755079f 100644 (file)
--- a/libgo/runtime/runtime.h
+++ b/libgo/runtime/runtime.h
@@ -518,7 +518,7 @@ MCache*     runtime_allocmcache(void);
 void   free(void *v);
 #define runtime_cas(pval, old, new) __sync_bool_compare_and_swap (pval, old, new)
 #define runtime_casp(pval, old, new) __sync_bool_compare_and_swap (pval, old, new)
-#define runtime_cas64(pval, pold, new) __atomic_compare_exchange_n (pval, pold, new, 1, __ATOMIC_SEQ_CST, __ATOMIC_RELAXED)
+#define runtime_cas64(pval, pold, new) __atomic_compare_exchange_n (pval, pold, new, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)
 #define runtime_xadd(p, v) __sync_add_and_fetch (p, v)
 #define runtime_xadd64(p, v) __sync_add_and_fetch (p, v)
 #define runtime_xchg(p, v) __atomic_exchange_n (p, v, __ATOMIC_SEQ_CST)