drm/i915: Remove dead i915_gem_evict_everything()

With UMS gone, we no longer use it during suspend. And with the last
user removed from the shrinker, we can remove the dead code.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_drv.h

@@ -3177,7 +3177,6 @@ int __must_check i915_gem_evict_something(struct drm_device *dev,
 					  unsigned long end,
 					  unsigned flags);
 int i915_gem_evict_vm(struct i915_address_space *vm, bool do_idle);
-int i915_gem_evict_everything(struct drm_device *dev);
 
 /* belongs in i915_gem_gtt.h */
 static inline void i915_gem_chipset_flush(struct drm_device *dev)

drivers/gpu/drm/i915/i915_gem_evict.c

@@ -237,48 +237,3 @@ int i915_gem_evict_vm(struct i915_address_space *vm, bool do_idle)
 
 	return 0;
 }
-
-/**
- * i915_gem_evict_everything - Try to evict all objects
- * @dev: Device to evict objects for
- *
- * This functions tries to evict all gem objects from all address spaces. Used
- * by the shrinker as a last-ditch effort and for suspend, before releasing the
- * backing storage of all unbound objects.
- */
-int
-i915_gem_evict_everything(struct drm_device *dev)
-{
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct i915_address_space *vm, *v;
-	bool lists_empty = true;
-	int ret;
-
-	list_for_each_entry(vm, &dev_priv->vm_list, global_link) {
-		lists_empty = (list_empty(&vm->inactive_list) &&
-			       list_empty(&vm->active_list));
-		if (!lists_empty)
-			lists_empty = false;
-	}
-
-	if (lists_empty)
-		return -ENOSPC;
-
-	trace_i915_gem_evict_everything(dev);
-
-	/* The gpu_idle will flush everything in the write domain to the
-	 * active list. Then we must move everything off the active list
-	 * with retire requests.
-	 */
-	ret = i915_gpu_idle(dev);
-	if (ret)
-		return ret;
-
-	i915_gem_retire_requests(dev);
-
-	/* Having flushed everything, unbind() should never raise an error */
-	list_for_each_entry_safe(vm, v, &dev_priv->vm_list, global_link)
-		WARN_ON(i915_gem_evict_vm(vm, false));
-
-	return 0;
-}