[PATCH] drm/radeon: Include swiotlb.h if SWIOTLB configured.

[Huacai Chen]

When SWIOTLB is configured, if without this patch kernel compilation
fails.

Signed-off-by: Huacai Chen <chenhc at lemote.com>
Signed-off-by: Hongliang Tao <taohl at lemote.com>
Signed-off-by: Hua Yan <yanh at lemote.com>
Cc: dri-devel at lists.freedesktop.org
---
 drivers/gpu/drm/radeon/radeon_ttm.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
index 5b71c71..fc3ac22 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -41,6 +41,10 @@
 #include "radeon_reg.h"
 #include "radeon.h"
 
+#ifdef CONFIG_SWIOTLB
+#include <linux/swiotlb.h>
+#endif
+
 #define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
 
 static int radeon_ttm_debugfs_init(struct radeon_device *rdev);
-- 
1.7.7.3