When SWIOTLB is configured, if without this patch kernel compilation fails with such error messages:

drivers/gpu/drm/radeon/radeon_ttm.c: In function 'radeon_ttm_tt_populate': drivers/gpu/drm/radeon/radeon_ttm.c:606:2: error: implicit declaration of function 'swiotlb_nr_tbl' drivers/gpu/drm/radeon/radeon_ttm.c:607:3: warning: passing argument 2 of 'ttm_dma_populate' from incompatible pointer type include/drm/ttm/ttm_page_alloc.h:81:12: note: expected 'struct device *' but argument is of type 'struct device *' drivers/gpu/drm/radeon/radeon_ttm.c: In function 'radeon_ttm_tt_unpopulate': drivers/gpu/drm/radeon/radeon_ttm.c:653:3: warning: passing argument 2 of 'ttm_dma_unpopulate' from incompatible pointer type include/drm/ttm/ttm_page_alloc.h:82:13: note: expected 'struct device *' but argument is of type 'struct device *'

V2: 1, Add compilation error messages; 2, Make the From: address the same as Signed-off-by address.

V3: 1, Send to Alex Deucher since this is radeon specific; 2, Add Reviewed-by email addresses.

Signed-off-by: Huacai Chen chenhc@lemote.com Signed-off-by: Hongliang Tao taohl@lemote.com Signed-off-by: Hua Yan yanh@lemote.com Reviewed-by: Michel Dänzer michel.daenzer@amd.com Reviewed-by: Konrad Rzeszutek Wilk konrad.wilk@oracle.com Cc: dri-devel@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);