drm: Mark constant arrays of drm_display_mode const
... and fixup some methods to accept the constant argument.
Now that constant module arrays are loaded into read-only memory, using
const appropriately has some benefits beyond warning the programmer
about likely mistakes.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index 58e65f9..25bf873 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -593,7 +593,7 @@
*
* Return @modes's hsync rate in kHz, rounded to the nearest int.
*/
-int drm_mode_hsync(struct drm_display_mode *mode)
+int drm_mode_hsync(const struct drm_display_mode *mode)
{
unsigned int calc_val;
@@ -627,7 +627,7 @@
* If it is 70.288, it will return 70Hz.
* If it is 59.6, it will return 60Hz.
*/
-int drm_mode_vrefresh(struct drm_display_mode *mode)
+int drm_mode_vrefresh(const struct drm_display_mode *mode)
{
int refresh = 0;
unsigned int calc_val;
@@ -725,7 +725,7 @@
* a pointer to it. Used to create new instances of established modes.
*/
struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
- struct drm_display_mode *mode)
+ const struct drm_display_mode *mode)
{
struct drm_display_mode *nmode;
int new_id;