ARM: make arch_ret_to_user macro optional

Only 3 platforms need arch_ret_to_user macro, so add ARCH_HAS_RET_TO_USER
kconfig option and make iop13xx, iop32x and iop33x select it.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Nicolas Pitre <nico@linaro.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index a48aecc17eac..7d809b7e0504 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -186,6 +186,9 @@ config GENERIC_ISA_DMA
 config FIQ
         bool
 
+config NEED_RET_TO_USER
+        bool
+
 config ARCH_MTD_XIP
         bool
 
@@ -479,6 +482,7 @@ config ARCH_IOP13XX
         select ARCH_SUPPORTS_MSI
         select VMSPLIT_1G
         select NEED_MACH_MEMORY_H
+        select NEED_RET_TO_USER
         help
           Support for Intel's IOP13XX (XScale) family of processors.
 
@@ -486,6 +490,7 @@ config ARCH_IOP32X
         bool "IOP32x-based"
         depends on MMU
         select CPU_XSCALE
+        select NEED_RET_TO_USER
         select PLAT_IOP
         select PCI
         select ARCH_REQUIRE_GPIOLIB
@@ -497,6 +502,7 @@ config ARCH_IOP33X
         bool "IOP33x-based"
         depends on MMU
         select CPU_XSCALE
+        select NEED_RET_TO_USER
         select PLAT_IOP
         select PCI
         select ARCH_REQUIRE_GPIOLIB