memory_ordering.patch

From ceb3966ac9758de157a726783af17aaa7d7a79dd Mon Sep 17 00:00:00 2001
From: Takuya ASADA <syuu@cloudius-systems.com>
Date: Mon, 9 Jun 2014 05:24:41 -0700
Subject: [PATCH 1/3] vmxnet3: change memory ordering on _check_empty_queues

---
 include/osv/percpu_xmit.hh | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/osv/percpu_xmit.hh b/include/osv/percpu_xmit.hh
index 3fed36b..f8b836a 100644
--- a/include/osv/percpu_xmit.hh
+++ b/include/osv/percpu_xmit.hh
@@ -425,14 +425,14 @@ private:
 
     // PENDING (packets) controling functions
     bool has_pending() const {
-        return _check_empty_queues.load(std::memory_order_acquire);
+        return _check_empty_queues.load(std::memory_order_seq_cst);
     }
 
     bool test_and_set_pending() {
-        return _check_empty_queues.exchange(true, std::memory_order_acq_rel);
+        return _check_empty_queues.exchange(true, std::memory_order_seq_cst);
     }
     void clear_pending() {
-        _check_empty_queues.store(false, std::memory_order_release);
+        _check_empty_queues.store(false, std::memory_order_seq_cst);
     }
 
 private:
-- 
1.9.3