v4.19.13 snapshot.
diff --git a/include/uapi/linux/coda_psdev.h b/include/uapi/linux/coda_psdev.h
new file mode 100644
index 0000000..aa6623e
--- /dev/null
+++ b/include/uapi/linux/coda_psdev.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI__CODA_PSDEV_H
+#define _UAPI__CODA_PSDEV_H
+
+#include <linux/magic.h>
+
+#define CODA_PSDEV_MAJOR 67
+#define MAX_CODADEVS 5 /* how many do we allow */
+
+
+/* messages between coda filesystem in kernel and Venus */
+struct upc_req {
+ struct list_head uc_chain;
+ caddr_t uc_data;
+ u_short uc_flags;
+ u_short uc_inSize; /* Size is at most 5000 bytes */
+ u_short uc_outSize;
+ u_short uc_opcode; /* copied from data to save lookup */
+ int uc_unique;
+ wait_queue_head_t uc_sleep; /* process' wait queue */
+};
+
+#define CODA_REQ_ASYNC 0x1
+#define CODA_REQ_READ 0x2
+#define CODA_REQ_WRITE 0x4
+#define CODA_REQ_ABORT 0x8
+
+#endif /* _UAPI__CODA_PSDEV_H */