HVM-738 smb_wmb and smb_rmb in kvm_x86.h shouldn't be visible to userland

1 files changed, 2 insertions, 1 deletions

diff --git a/kvm_x86.h b/kvm_x86.h
index ddf7718..b90f506 100644
--- a/kvm_x86.h
+++ b/kvm_x86.h
@@ -300,8 +300,9 @@ typedef struct kvm_vcpu_events {
  * The following should provide an optimization barrier.
  * If the system does reorder loads and stores, this needs to be changed.
  */
-
+#ifdef _KERNEL
 #define	smp_wmb()   __asm__ __volatile__("" ::: "memory")
 #define	smp_rmb()   __asm__ __volatile__("" ::: "memory")
+#endif
 
 #endif /* __KVM_X86_H */