From 955047a7d14073bb2a42c807a06d4d368d3996e3 Mon Sep 17 00:00:00 2001
From: Samy Al Bahra <sbahra@repnop.org>
Date: Thu, 23 Aug 2012 13:48:08 -0400
Subject: [PATCH] ck_{ring,fifo}: Add store fences while we lack load_store
 fences.

---
 include/ck_fifo.h | 2 ++
 include/ck_ring.h | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/include/ck_fifo.h b/include/ck_fifo.h
index edb2059..707bc1e 100644
--- a/include/ck_fifo.h
+++ b/include/ck_fifo.h
@@ -144,6 +144,8 @@ ck_fifo_spsc_dequeue(struct ck_fifo_spsc *fifo, void *value)
 	/* If entry is visible, guarantee store to value is visible. */
 	ck_pr_fence_load();
 	ck_pr_store_ptr(value, entry->value);
+
+	ck_pr_fence_store();
 	ck_pr_store_ptr(&fifo->head, entry);
 	return (true);
 }
diff --git a/include/ck_ring.h b/include/ck_ring.h
index 14f6380..077d94a 100644
--- a/include/ck_ring.h
+++ b/include/ck_ring.h
@@ -108,6 +108,7 @@
 										\
 		ck_pr_fence_load();						\
 		*data = ring->ring[consumer];					\
+		ck_pr_fence_store();						\
 		ck_pr_store_uint(&ring->c_head, (consumer + 1) & ring->mask);	\
 										\
 		return (true);							\
@@ -213,6 +214,7 @@ ck_ring_dequeue_spsc(struct ck_ring *ring, void *data)
 	 * before this operation completes.
 	 */
 	ck_pr_store_ptr(data, ring->ring[consumer]);
+	ck_pr_fence_store();
 	ck_pr_store_uint(&ring->c_head, (consumer + 1) & ring->mask);
 	return (true);
 }