[PATCH] build: convert CONFIG_COMPAT to Kconfig

[Doug Goldstein <cardoe@cardoe.com>]

Use the Kconfig generated CONFIG_COMPAT defines in the code base.

CC: Keir Fraser <keir@xen.org>
CC: Jan Beulich <jbeulich@suse.com>
CC: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Doug Goldstein <cardoe@cardoe.com>
---
 config/x86_64.mk     | 1 -
 xen/arch/x86/Kconfig | 1 +
 xen/common/Kconfig   | 7 +++++++
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/config/x86_64.mk b/config/x86_64.mk
index f12d549..85fa27c 100644
--- a/config/x86_64.mk
+++ b/config/x86_64.mk
@@ -2,7 +2,6 @@ CONFIG_X86 := y
 CONFIG_X86_64 := y
 CONFIG_X86_$(XEN_OS) := y
 
-CONFIG_COMPAT := y
 CONFIG_MIGRATE := y
 CONFIG_XCUTILS := y
 
diff --git a/xen/arch/x86/Kconfig b/xen/arch/x86/Kconfig
index 07e366d..7d2ed96 100644
--- a/xen/arch/x86/Kconfig
+++ b/xen/arch/x86/Kconfig
@@ -3,6 +3,7 @@ config X86_64
 
 config X86
 	def_bool y
+	select COMPAT
 	select HAS_ACPI
 	select HAS_CPUFREQ
 	select HAS_EHCI
diff --git a/xen/common/Kconfig b/xen/common/Kconfig
index 7d0e9a9..62e5519 100644
--- a/xen/common/Kconfig
+++ b/xen/common/Kconfig
@@ -1,6 +1,13 @@
 
 menu "Common Features"
 
+config COMPAT
+	def_bool y
+	help
+	  32-bit interface support on 64-bit Xen which is used for both
+	  HVM and PV guests. HVMLoader makes 32-bit hypercalls irrespective
+	  of the destination runmode of the guest.
+
 # Select HAS_DEVICE_TREE if device tree is supported
 config HAS_DEVICE_TREE
 	bool
-- 
2.4.10