staging: android: ion: Drop ion_map_kernel interface

Nobody uses this interface externally. Drop it.
Signed-off-by: NLaura Abbott <labbott@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/android/ion/ion.c

@@ -424,22 +424,6 @@ static void *ion_buffer_kmap_get(struct ion_buffer *buffer)
 	return vaddr;
 }
 
-static void *ion_handle_kmap_get(struct ion_handle *handle)
-{
-	struct ion_buffer *buffer = handle->buffer;
-	void *vaddr;
-
-	if (handle->kmap_cnt) {
-		handle->kmap_cnt++;
-		return buffer->vaddr;
-	}
-	vaddr = ion_buffer_kmap_get(buffer);
-	if (IS_ERR(vaddr))
-		return vaddr;
-	handle->kmap_cnt++;
-	return vaddr;
-}
-
 static void ion_buffer_kmap_put(struct ion_buffer *buffer)
 {
 	buffer->kmap_cnt--;
@@ -462,49 +446,6 @@ static void ion_handle_kmap_put(struct ion_handle *handle)
 		ion_buffer_kmap_put(buffer);
 }
 
-void *ion_map_kernel(struct ion_client *client, struct ion_handle *handle)
-{
-	struct ion_buffer *buffer;
-	void *vaddr;
-
-	mutex_lock(&client->lock);
-	if (!ion_handle_validate(client, handle)) {
-		pr_err("%s: invalid handle passed to map_kernel.\n",
-		       __func__);
-		mutex_unlock(&client->lock);
-		return ERR_PTR(-EINVAL);
-	}
-
-	buffer = handle->buffer;
-
-	if (!handle->buffer->heap->ops->map_kernel) {
-		pr_err("%s: map_kernel is not implemented by this heap.\n",
-		       __func__);
-		mutex_unlock(&client->lock);
-		return ERR_PTR(-ENODEV);
-	}
-
-	mutex_lock(&buffer->lock);
-	vaddr = ion_handle_kmap_get(handle);
-	mutex_unlock(&buffer->lock);
-	mutex_unlock(&client->lock);
-	return vaddr;
-}
-EXPORT_SYMBOL(ion_map_kernel);
-
-void ion_unmap_kernel(struct ion_client *client, struct ion_handle *handle)
-{
-	struct ion_buffer *buffer;
-
-	mutex_lock(&client->lock);
-	buffer = handle->buffer;
-	mutex_lock(&buffer->lock);
-	ion_handle_kmap_put(handle);
-	mutex_unlock(&buffer->lock);
-	mutex_unlock(&client->lock);
-}
-EXPORT_SYMBOL(ion_unmap_kernel);
-
 static struct mutex debugfs_mutex;
 static struct rb_root *ion_root_client;
 static int is_client_alive(struct ion_client *client)