commit 7ef9c62fcd62d843bc23e4f7073bf3e22599638c
Author: Pierre Willenbrock <pierre@pirsoft.de>
Date:   Sat Oct 18 20:16:38 2008 +0200

    Make GEM backing shmem storage allocate pages below 4G boundary
    
    Signed-off-by: Pierre Willenbrock <pierre@pirsoft.de>

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index ccd1afd..45a3d48 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -101,6 +101,9 @@ drm_gem_object_alloc(struct drm_device *dev, size_t size)
 		return NULL;
 	}
 
+	obj->filp->f_path.dentry->d_inode->i_mapping->flags &= ~__GFP_HIGHMEM;
+	obj->filp->f_path.dentry->d_inode->i_mapping->flags |= __GFP_DMA32;
+
 	kref_init(&obj->refcount);
 	kref_init(&obj->handlecount);
 	obj->size = size;