[PATCH 12/12] drm/ttm: unexport ttm_bo_default_io_mem_pfn and make it static

[Tan Xiaojun <tanxiaojun@huawei.com>]

No one will use this function except in ttm_bo_vm.c now. So unexport it
and make it static.

Signed-off-by: Tan Xiaojun <tanxiaojun@huawei.com>
---
 drivers/gpu/drm/ttm/ttm_bo_vm.c | 23 +++++++++++++++--------
 include/drm/ttm/ttm_bo_api.h    | 11 -----------
 2 files changed, 15 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
index e25a99b..ff70fc96 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
@@ -92,6 +92,21 @@ static int ttm_bo_vm_fault_idle(struct ttm_buffer_object *bo,
 	return ret;
 }
 
+/**
+ * ttm_bo_default_iomem_pfn - get a pfn for a page offset
+ *
+ * @bo: the BO we need to look up the pfn for
+ * @page_offset: offset inside the BO to look up.
+ *
+ * Calculate the PFN for iomem based mappings during page fault
+ */
+static unsigned long ttm_bo_default_io_mem_pfn(struct ttm_buffer_object *bo,
+					       unsigned long page_offset)
+{
+	return ((bo->mem.bus.base + bo->mem.bus.offset) >> PAGE_SHIFT)
+		+ page_offset;
+}
+
 static int ttm_bo_vm_fault(struct vm_fault *vmf)
 {
 	struct vm_area_struct *vma = vmf->vma;
@@ -407,14 +422,6 @@ static struct ttm_buffer_object *ttm_bo_vm_lookup(struct ttm_bo_device *bdev,
 	return bo;
 }
 
-unsigned long ttm_bo_default_io_mem_pfn(struct ttm_buffer_object *bo,
-					unsigned long page_offset)
-{
-	return ((bo->mem.bus.base + bo->mem.bus.offset) >> PAGE_SHIFT)
-		+ page_offset;
-}
-EXPORT_SYMBOL(ttm_bo_default_io_mem_pfn);
-
 int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
 		struct ttm_bo_device *bdev)
 {
diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
index fa07be1..0b1ce05 100644
--- a/include/drm/ttm/ttm_bo_api.h
+++ b/include/drm/ttm/ttm_bo_api.h
@@ -711,17 +711,6 @@ extern int ttm_fbdev_mmap(struct vm_area_struct *vma,
 			  struct ttm_buffer_object *bo);
 
 /**
- * ttm_bo_default_iomem_pfn - get a pfn for a page offset
- *
- * @bo: the BO we need to look up the pfn for
- * @page_offset: offset inside the BO to look up.
- *
- * Calculate the PFN for iomem based mappings during page fault
- */
-unsigned long ttm_bo_default_io_mem_pfn(struct ttm_buffer_object *bo,
-				        unsigned long page_offset);
-
-/**
  * ttm_bo_mmap - mmap out of the ttm device address space.
  *
  * @filp:      filp as input from the mmap method.
-- 
2.7.4