Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

[net-next-2.6.git] / include / drm / ttm / ttm_bo_api.h

diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
index 267a86c74e2e5cc089dfb5c72a1f1da3dbdae721..2040e6c4f1729a7de3001d5077277b8521427fb9 100644 (file)
--- a/include/drm/ttm/ttm_bo_api.h
+++ b/include/drm/ttm/ttm_bo_api.h
@@ -246,9 +246,11 @@ struct ttm_buffer_object {
 
        atomic_t reserved;
 
-
        /**
         * Members protected by the bo::lock
+        * In addition, setting sync_obj to anything else
+        * than NULL requires bo::reserved to be held. This allows for
+        * checking NULL while reserved but not holding bo::lock.
         */
 
        void *sync_obj_arg;