From 2ccf2d7e314398fe4680c164bf972e59633e2a6e Mon Sep 17 00:00:00 2001
From: Peter Wu <peter@lekensteyn.nl>
Date: Mon, 6 Jun 2016 02:20:29 +0200
Subject: [PATCH] Define ACPI_HANDLE macro for older versions

ACPI_HANDLE was added in Linux 3.8,
DEVICE_ACPI_HANDLE is gone in Linux 3.13. Move the definition a bit
higher, maybe we can reuse it later.
---
 bbswitch.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/bbswitch.c b/bbswitch.c
index 341608f..15ab30c 100644
--- a/bbswitch.c
+++ b/bbswitch.c
@@ -35,6 +35,11 @@
 #include <linux/suspend.h>
 #include <linux/seq_file.h>
 #include <linux/pm_runtime.h>
+#include <linux/version.h>
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,8,0)
+#   define ACPI_HANDLE DEVICE_ACPI_HANDLE
+#endif
 
 #define BBSWITCH_VERSION "0.8"
 
@@ -403,13 +408,7 @@ static int __init bbswitch_init(void) {
             pci_class != PCI_CLASS_DISPLAY_3D)
             continue;
 
-#ifdef ACPI_HANDLE
-        /* since Linux 3.8 */
         handle = ACPI_HANDLE(&pdev->dev);
-#else
-        /* removed since Linux 3.13 */
-        handle = DEVICE_ACPI_HANDLE(&pdev->dev);
-#endif
         if (!handle) {
             pr_warn("cannot find ACPI handle for VGA device %s\n",
                 dev_name(&pdev->dev));