v4.19.13 snapshot.
diff --git a/include/acpi/acnames.h b/include/acpi/acnames.h
new file mode 100644
index 0000000..6f69a4f
--- /dev/null
+++ b/include/acpi/acnames.h
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
+/******************************************************************************
+ *
+ * Name: acnames.h - Global names and strings
+ *
+ * Copyright (C) 2000 - 2018, Intel Corp.
+ *
+ *****************************************************************************/
+
+#ifndef __ACNAMES_H__
+#define __ACNAMES_H__
+
+/* Method names - these methods can appear anywhere in the namespace */
+
+#define METHOD_NAME__ADR "_ADR"
+#define METHOD_NAME__AEI "_AEI"
+#define METHOD_NAME__BBN "_BBN"
+#define METHOD_NAME__CBA "_CBA"
+#define METHOD_NAME__CID "_CID"
+#define METHOD_NAME__CLS "_CLS"
+#define METHOD_NAME__CRS "_CRS"
+#define METHOD_NAME__DDN "_DDN"
+#define METHOD_NAME__DMA "_DMA"
+#define METHOD_NAME__HID "_HID"
+#define METHOD_NAME__INI "_INI"
+#define METHOD_NAME__PLD "_PLD"
+#define METHOD_NAME__DSD "_DSD"
+#define METHOD_NAME__PRS "_PRS"
+#define METHOD_NAME__PRT "_PRT"
+#define METHOD_NAME__PRW "_PRW"
+#define METHOD_NAME__PS0 "_PS0"
+#define METHOD_NAME__PS1 "_PS1"
+#define METHOD_NAME__PS2 "_PS2"
+#define METHOD_NAME__PS3 "_PS3"
+#define METHOD_NAME__REG "_REG"
+#define METHOD_NAME__SB_ "_SB_"
+#define METHOD_NAME__SEG "_SEG"
+#define METHOD_NAME__SRS "_SRS"
+#define METHOD_NAME__STA "_STA"
+#define METHOD_NAME__SUB "_SUB"
+#define METHOD_NAME__UID "_UID"
+
+/* Method names - these methods must appear at the namespace root */
+
+#define METHOD_PATHNAME__PTS "\\_PTS"
+#define METHOD_PATHNAME__SST "\\_SI._SST"
+#define METHOD_PATHNAME__WAK "\\_WAK"
+
+/* Definitions of the predefined namespace names */
+
+#define ACPI_UNKNOWN_NAME (u32) 0x3F3F3F3F /* Unknown name is "????" */
+#define ACPI_PREFIX_MIXED (u32) 0x69706341 /* "Acpi" */
+#define ACPI_PREFIX_LOWER (u32) 0x69706361 /* "acpi" */
+
+/* Root name stuff */
+
+#define ACPI_ROOT_NAME (u32) 0x5F5F5F5C /* Root name is "\___" */
+#define ACPI_ROOT_PATHNAME "\\___"
+#define ACPI_NAMESPACE_ROOT "Namespace Root"
+#define ACPI_NS_ROOT_PATH "\\"
+
+#endif /* __ACNAMES_H__ */