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Subject[PATCH] iommu/intel: Fix build failure with intel-gtt and !intel-iommu
Not sure if this is fixed already. I stumbled over it while
compile-testing merges in the IOMMU tree.

From 7d8438f41b3cfbb1094030d7cf5d06da0fd16308 Mon Sep 17 00:00:00 2001
From: Joerg Roedel <joerg.roedel@amd.com>
Date: Fri, 11 Nov 2011 14:42:53 +0100
Subject: [PATCH] iommu/intel: Fix build failure with intel-gtt and !intel-iommu

With v3.2-rc1 the following build error occurs when Intel
IOMMU is off and Intel-GTT is on:

ERROR: "intel_iommu_gfx_mapped" [drivers/char/agp/intel-gtt.ko] undefined!

This patch fixes that.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
drivers/char/agp/intel-gtt.c | 2 +-
include/linux/intel-iommu.h | 6 ++++++
2 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index 66cd0b8..bfe5133 100644
--- a/drivers/char/agp/intel-gtt.c
+++ b/drivers/char/agp/intel-gtt.c
@@ -22,6 +22,7 @@
#include <linux/pagemap.h>
#include <linux/agp_backend.h>
#include <linux/delay.h>
+#include <linux/intel-iommu.h>
#include <asm/smp.h>
#include "agp.h"
#include "intel-agp.h"
@@ -1186,7 +1187,6 @@ static void gen6_cleanup(void)
/* Certain Gen5 chipsets require require idling the GPU before
* unmapping anything from the GTT when VT-d is enabled.
*/
-extern int intel_iommu_gfx_mapped;
static inline int needs_idle_maps(void)
{
const unsigned short gpu_devid = intel_private.pcidev->device;
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index e6ca56d..651cc08 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -363,4 +363,10 @@ extern int qi_submit_sync(struct qi_desc *desc, struct intel_iommu *iommu);

extern int dmar_ir_support(void);

+#ifdef CONFIG_INTEL_IOMMU
+extern int intel_iommu_gfx_mapped;
+#else
+#define intel_iommu_gfx_mapped 1
+#endif /* CONFIG_INTEL_IOMMU */
+
#endif
--
1.7.5.4

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