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

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Date:	Tue,  9 Oct 2012 17:22:59 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Russell King <rmk+kernel@....linux.org.uk>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Arnd Bergmann <arnd@...db.de>,
	Stefano Stabellini <stefano.stabellini@...citrix.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	xen-devel@...ts.xensource.com
Subject: [PATCH 5/9] ARM: Xen: fix initial build problems:

* 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@...db.de>
Cc: Stefano Stabellini <stefano.stabellini@...citrix.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc: Jeremy Fitzhardinge <jeremy@...p.org>
Cc: xen-devel@...ts.xensource.com
---
 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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