From 88d323f40d97568bfb754313e8b3dd2778af72bd Mon Sep 17 00:00:00 2001
From: Samy Al Bahra <sbahra@appnexus.com>
Date: Thu, 17 Apr 2014 16:17:07 -0400
Subject: [PATCH] Revert "ck_rwlock: Acquire semantics for ordering on  latch
 bits."

This reverts commit 2b567320de8c1b67c386a8b42165ca124a7bcca8.
---
 include/ck_rwlock.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/ck_rwlock.h b/include/ck_rwlock.h
index 25cb1be..e89db6f 100644
--- a/include/ck_rwlock.h
+++ b/include/ck_rwlock.h
@@ -223,7 +223,6 @@ ck_rwlock_read_lock(ck_rwlock_t *rw)
 			 * fence operation. If writer is observed to 0, then
 			 * it is guaranteed that the latch will be visible.
 			 */
-			ck_pr_fence_load();
 			snapshot = ck_pr_load_32(&rw->n_readers);
 			if (snapshot >> CK_RWLOCK_LATCH_SHIFT)
 				continue;
@@ -234,6 +233,8 @@ ck_rwlock_read_lock(ck_rwlock_t *rw)
 		ck_pr_dec_32(&rw->n_readers);
 	}
 
+	/* Acquire semantics are necessary. */
+	ck_pr_fence_load();
 	return;
 }