drm: Kill user_modes list and the associated ioctls

There is no way to use modes added to the user_modes list. We never
look at the contents of said list in the kernel, and the only operations
userspace can do are attach and detach. So the only "benefit" of this
interface is wasting kernel memory.

Fortunately it seems no real user space application ever used these
ioctls. So just kill them.

Also remove the prototypes for the non-existing drm_mode_addmode_ioctl()
and drm_mode_rmmode_ioctl() functions.

v2: Use drm_noop instead of completely removing the ioctls

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

2 files changed, 2 insertions, 17 deletions

diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index cf474498cee0..adb3f9b625f6 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -554,7 +554,6 @@ enum drm_connector_force {
  * @probed_modes: list of modes derived directly from the display
  * @display_info: information about attached display (e.g. from EDID)
  * @funcs: connector control functions
- * @user_modes: user added mode list
  * @edid_blob_ptr: DRM property containing EDID if present
  * @properties: property tracking for this connector
  * @polled: a %DRM_CONNECTOR_POLL_<foo> value for core driven polling
@@ -598,7 +597,6 @@ struct drm_connector {
 	struct drm_display_info display_info;
 	const struct drm_connector_funcs *funcs;
 
-	struct list_head user_modes;
 	struct drm_property_blob *edid_blob_ptr;
 	struct drm_object_properties properties;
 
@@ -927,11 +925,6 @@ extern int drm_mode_width(const struct drm_display_mode *mode);
 extern int drm_mode_height(const struct drm_display_mode *mode);
 
 /* for us by fb module */
-extern int drm_mode_attachmode_crtc(struct drm_device *dev,
-				    struct drm_crtc *crtc,
-				    const struct drm_display_mode *mode);
-extern int drm_mode_detachmode_crtc(struct drm_device *dev, struct drm_display_mode *mode);
-
 extern struct drm_display_mode *drm_mode_create(struct drm_device *dev);
 extern void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode);
 extern void drm_mode_list_concat(struct list_head *head,
@@ -1040,14 +1033,6 @@ extern int drm_mode_getfb(struct drm_device *dev,
 			  void *data, struct drm_file *file_priv);
 extern int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
 				  void *data, struct drm_file *file_priv);
-extern int drm_mode_addmode_ioctl(struct drm_device *dev,
-				  void *data, struct drm_file *file_priv);
-extern int drm_mode_rmmode_ioctl(struct drm_device *dev,
-				 void *data, struct drm_file *file_priv);
-extern int drm_mode_attachmode_ioctl(struct drm_device *dev,
-				     void *data, struct drm_file *file_priv);
-extern int drm_mode_detachmode_ioctl(struct drm_device *dev,
-				     void *data, struct drm_file *file_priv);
 
 extern int drm_mode_getproperty_ioctl(struct drm_device *dev,
 				      void *data, struct drm_file *file_priv);
diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
index 73a99e4664be..5a57be68bab7 100644
--- a/include/uapi/drm/drm.h
+++ b/include/uapi/drm/drm.h
@@ -711,8 +711,8 @@ struct drm_prime_handle {
 #define DRM_IOCTL_MODE_SETGAMMA		DRM_IOWR(0xA5, struct drm_mode_crtc_lut)
 #define DRM_IOCTL_MODE_GETENCODER	DRM_IOWR(0xA6, struct drm_mode_get_encoder)
 #define DRM_IOCTL_MODE_GETCONNECTOR	DRM_IOWR(0xA7, struct drm_mode_get_connector)
-#define DRM_IOCTL_MODE_ATTACHMODE	DRM_IOWR(0xA8, struct drm_mode_mode_cmd)
-#define DRM_IOCTL_MODE_DETACHMODE	DRM_IOWR(0xA9, struct drm_mode_mode_cmd)
+#define DRM_IOCTL_MODE_ATTACHMODE	DRM_IOWR(0xA8, struct drm_mode_mode_cmd) /* deprecated (never worked) */
+#define DRM_IOCTL_MODE_DETACHMODE	DRM_IOWR(0xA9, struct drm_mode_mode_cmd) /* deprecated (never worked) */
 
 #define DRM_IOCTL_MODE_GETPROPERTY	DRM_IOWR(0xAA, struct drm_mode_get_property)
 #define DRM_IOCTL_MODE_SETPROPERTY	DRM_IOWR(0xAB, struct drm_mode_connector_set_property)