drm: drop unused drm_master->unique_size

This field is unused and there is really no reason to optimize
unique-allocations. Drop it.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/drm_ioctl.c

@@ -189,7 +189,6 @@ drm_unset_busid(struct drm_device *dev,
 	kfree(master->unique);
 	master->unique = NULL;
 	master->unique_len = 0;
-	master->unique_size = 0;
 }
 
 /**

drivers/gpu/drm/drm_pci.c

@@ -138,7 +138,6 @@ static int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
 		return -ENOMEM;
 
 	master->unique_len = strlen(master->unique);
-	master->unique_size = master->unique_len + 1;
 	return 0;
 }
 
@@ -149,8 +148,7 @@ int drm_pci_set_unique(struct drm_device *dev,
 	int domain, bus, slot, func, ret;
 
 	master->unique_len = u->unique_len;
-	master->unique_size = u->unique_len + 1;
-	master->unique = kmalloc(master->unique_size, GFP_KERNEL);
+	master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL);
 	if (!master->unique) {
 		ret = -ENOMEM;
 		goto err;

drivers/gpu/drm/drm_platform.c

@@ -82,7 +82,6 @@ static int drm_platform_set_busid(struct drm_device *dev, struct drm_master *mas
 		return -ENOMEM;
 
 	master->unique_len = strlen(master->unique);
-	master->unique_size = master->unique_len;
 	return 0;
 }
 

include/drm/drmP.h

@@ -574,7 +574,6 @@ struct drm_gem_object {
  * @minor: Link back to minor char device we are master for. Immutable.
  * @unique: Unique identifier: e.g. busid. Protected by drm_global_mutex.
  * @unique_len: Length of unique field. Protected by drm_global_mutex.
- * @unique_size: Amount allocated. Protected by drm_global_mutex.
  * @magiclist: Hash of used authentication tokens. Protected by struct_mutex.
  * @magicfree: List of used authentication tokens. Protected by struct_mutex.
  * @lock: DRI lock information.
@@ -585,7 +584,6 @@ struct drm_master {
 	struct drm_minor *minor;
 	char *unique;
 	int unique_len;
-	int unique_size;
 	struct drm_open_hash magiclist;
 	struct list_head magicfree;
 	struct drm_lock_data lock;