[Xen-devel] [PATCH 5/9] ARM: Xen: fix initial build problems:

[Arnd Bergmann <arnd@xxxxxxxx>]

* The XEN_BALLOON code requires the balloon infrastructure that is not
  getting built on ARM.

* The tmem hypercall is not available on ARM

* ARMv6 does not support cmpxchg on 16-bit words that are used in the

* sys-hypervisor.c needs to include linux/err.h in order to use the
  IS_ERR/PTR_ERR/ERR_PTR family of functions.

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
---
 arch/arm/Kconfig             |    1 +
 drivers/xen/Kconfig          |    2 ++
 drivers/xen/sys-hypervisor.c |    1 +
 3 files changed, 4 insertions(+)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 6d2f7f5..85eaac3 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1846,6 +1846,7 @@ config XEN_DOM0
 config XEN
        bool "Xen guest support on ARM (EXPERIMENTAL)"
        depends on EXPERIMENTAL && ARM && OF
+       depends on !CPU_V6
        help
          Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
 
diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
index d4dffcd..126d8ce 100644
--- a/drivers/xen/Kconfig
+++ b/drivers/xen/Kconfig
@@ -3,6 +3,7 @@ menu "Xen driver support"
 
 config XEN_BALLOON
        bool "Xen memory balloon driver"
+       depends on !ARM
        default y
        help
          The balloon driver allows the Xen domain to request more memory from
@@ -145,6 +146,7 @@ config SWIOTLB_XEN
 
 config XEN_TMEM
        bool
+       depends on !ARM
        default y if (CLEANCACHE || FRONTSWAP)
        help
          Shim to interface in-kernel Transcendent Memory hooks
diff --git a/drivers/xen/sys-hypervisor.c b/drivers/xen/sys-hypervisor.c
index 5e5ad7e..66a0a14 100644
--- a/drivers/xen/sys-hypervisor.c
+++ b/drivers/xen/sys-hypervisor.c
@@ -11,6 +11,7 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/kobject.h>
+#include <linux/err.h>
 
 #include <asm/xen/hypervisor.h>
 #include <asm/xen/hypercall.h>
-- 
1.7.10


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