Add compatibility support for older intel cpus

[urcu.git] / urcu-pointer.c

diff --git a/urcu-pointer.c b/urcu-pointer.c
index da8b1ea7e76d0c702af5adb37f32361597525022..79ee72a08e7110ba67a44b80f834096543eaa379 100644 (file)
--- a/urcu-pointer.c
+++ b/urcu-pointer.c
@@ -50,5 +50,9 @@ void *rcu_xchg_pointer_sym(void **p, void *v)
 void *rcu_cmpxchg_pointer_sym(void **p, void *old, void *_new)
 {
        wmb();
-       return uatomic_cmpxchg(p, old, _new);
+       if (likely(URCU_CAS_AVAIL()))
+               return uatomic_cmpxchg(p, old, _new);
+
+       /* Compatibility for i386. Old-timer. */
+       return compat_uatomic_cmpxchg(p, old, _new);
 }