From: Joris Giovannangeli <joris@giovannangeli.fr>
Date: Sat, 22 Feb 2014 00:30:12 +0000 (+0100)
Subject: ttm: fix porting typo
X-Git-Tag: v3.9.0~495
X-Git-Url: https://gitweb.dragonflybsd.org/~tuxillo/dragonfly.git/commitdiff_plain/ea6f52c4fb2da1957cbee60ff4daf8be83de1f8e

ttm: fix porting typo

Bug: 2635
Submitted-by: vadaszi
---

diff --git a/sys/dev/drm/ttm/ttm_bo.c b/sys/dev/drm/ttm/ttm_bo.c
index 0d38876e4a..7a3c6af300 100644
--- a/sys/dev/drm/ttm/ttm_bo.c
+++ b/sys/dev/drm/ttm/ttm_bo.c
@@ -203,7 +203,7 @@ int ttm_bo_reserve_nolru(struct ttm_buffer_object *bo,
 {
 	int ret;
 
-	while (unlikely(atomic_read(&bo->reserved) != 0)) {
+	while (unlikely(atomic_xchg(&bo->reserved, 1) != 0)) {
 		/**
 		 * Deadlock avoidance for multi-bo reserving.
 		 */