diff --git a/drivers/acpi/acpica/utglobal.c b/drivers/acpi/acpica/utglobal.c
index 5e8df9177da44781ac07942d146e47b97e954cda..a72685c1e819660768933e84abe9d1076c953bff 100644
--- a/drivers/acpi/acpica/utglobal.c
+++ b/drivers/acpi/acpica/utglobal.c
@@ -102,12 +102,19 @@ const struct acpi_predefined_names acpi_gbl_pre_defined_names[] = {
 	{"_SB_", ACPI_TYPE_DEVICE, NULL},
 	{"_SI_", ACPI_TYPE_LOCAL_SCOPE, NULL},
 	{"_TZ_", ACPI_TYPE_DEVICE, NULL},
-	{"_REV", ACPI_TYPE_INTEGER, (char *)ACPI_CA_SUPPORT_LEVEL},
+	/*
+	 * March, 2015:
+	 * The _REV object is in the process of being deprecated, because
+	 * other ACPI implementations permanently return 2. Thus, it
+	 * has little or no value. Return 2 for compatibility with
+	 * other ACPI implementations.
+	 */
+	{"_REV", ACPI_TYPE_INTEGER, ACPI_CAST_PTR(char, 2)},
 	{"_OS_", ACPI_TYPE_STRING, ACPI_OS_NAME},
-	{"_GL_", ACPI_TYPE_MUTEX, (char *)1},
+	{"_GL_", ACPI_TYPE_MUTEX, ACPI_CAST_PTR(char, 1)},
 
 #if !defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY)
-	{"_OSI", ACPI_TYPE_METHOD, (char *)1},
+	{"_OSI", ACPI_TYPE_METHOD, ACPI_CAST_PTR(char, 1)},
 #endif
 
 	/* Table terminator */