[Qemu-devel] [PULL 37/74] rcu_queue: remove barrier from QLIST_EMPTY_RCU

[Paolo Bonzini]

From: "Emilio G. Cota" <address@hidden>

It's unnecessary because the pointer isn't dereferenced.

Signed-off-by: Emilio G. Cota <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Paolo Bonzini <address@hidden>
---
 include/qemu/rcu_queue.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/qemu/rcu_queue.h b/include/qemu/rcu_queue.h
index dd7b3be..6881ea5 100644
--- a/include/qemu/rcu_queue.h
+++ b/include/qemu/rcu_queue.h
@@ -36,7 +36,7 @@ extern "C" {
 /*
  * List access methods.
  */
-#define QLIST_EMPTY_RCU(head) (atomic_rcu_read(&(head)->lh_first) == NULL)
+#define QLIST_EMPTY_RCU(head) (atomic_read(&(head)->lh_first) == NULL)
 #define QLIST_FIRST_RCU(head) (atomic_rcu_read(&(head)->lh_first))
 #define QLIST_NEXT_RCU(elm, field) (atomic_rcu_read(&(elm)->field.le_next))
 
-- 
1.8.3.1