v4.19.13 snapshot.
diff --git a/include/drm/drm_auth.h b/include/drm/drm_auth.h
new file mode 100644
index 0000000..86bff98
--- /dev/null
+++ b/include/drm/drm_auth.h
@@ -0,0 +1,106 @@
+/*
+ * Internal Header for the Direct Rendering Manager
+ *
+ * Copyright 2016 Intel Corporation
+ *
+ * Author: Daniel Vetter <daniel.vetter@ffwll.ch>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _DRM_AUTH_H_
+#define _DRM_AUTH_H_
+
+/*
+ * Legacy DRI1 locking data structure. Only here instead of in drm_legacy.h for
+ * include ordering reasons.
+ *
+ * DO NOT USE.
+ */
+struct drm_lock_data {
+ struct drm_hw_lock *hw_lock;
+ struct drm_file *file_priv;
+ wait_queue_head_t lock_queue;
+ unsigned long lock_time;
+ spinlock_t spinlock;
+ uint32_t kernel_waiters;
+ uint32_t user_waiters;
+ int idle_has_lock;
+};
+
+/**
+ * struct drm_master - drm master structure
+ *
+ * @refcount: Refcount for this master object.
+ * @dev: Link back to the DRM device
+ * @lock: DRI1 lock information.
+ * @driver_priv: Pointer to driver-private information.
+ * @lessor: Lease holder
+ * @lessee_id: id for lessees. Owners always have id 0
+ * @lessee_list: other lessees of the same master
+ * @lessees: drm_masters leasing from this one
+ * @leases: Objects leased to this drm_master.
+ * @lessee_idr: All lessees under this owner (only used where lessor == NULL)
+ *
+ * Note that master structures are only relevant for the legacy/primary device
+ * nodes, hence there can only be one per device, not one per drm_minor.
+ */
+struct drm_master {
+ struct kref refcount;
+ struct drm_device *dev;
+ /**
+ * @unique: Unique identifier: e.g. busid. Protected by
+ * &drm_device.master_mutex.
+ */
+ char *unique;
+ /**
+ * @unique_len: Length of unique field. Protected by
+ * &drm_device.master_mutex.
+ */
+ int unique_len;
+ /**
+ * @magic_map: Map of used authentication tokens. Protected by
+ * &drm_device.master_mutex.
+ */
+ struct idr magic_map;
+ struct drm_lock_data lock;
+ void *driver_priv;
+
+ /* Tree of display resource leases, each of which is a drm_master struct
+ * All of these get activated simultaneously, so drm_device master points
+ * at the top of the tree (for which lessor is NULL). Protected by
+ * &drm_device.mode_config.idr_mutex.
+ */
+
+ struct drm_master *lessor;
+ int lessee_id;
+ struct list_head lessee_list;
+ struct list_head lessees;
+ struct idr leases;
+ struct idr lessee_idr;
+};
+
+struct drm_master *drm_master_get(struct drm_master *master);
+void drm_master_put(struct drm_master **master);
+bool drm_is_current_master(struct drm_file *fpriv);
+
+struct drm_master *drm_master_create(struct drm_device *dev);
+
+#endif