ttm_bo_kmap
ttm_bo_kmap(&abo->tbo, 0, PFN_UP(abo->tbo.base.size), &abo->kmap)) {
r = ttm_bo_kmap(&bo->tbo, 0, PFN_UP(bo->tbo.base.size), &bo->kmap);
int ttm_bo_kmap(struct ttm_buffer_object *bo, unsigned long start_page,
r = ttm_bo_kmap(&bo->tbo, 0, PFN_UP(bo->tbo.base.size), &bo->kmap);
EXPORT_SYMBOL(ttm_bo_kmap);
ret = ttm_bo_kmap(bo, page, 1, &map);