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>

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index a48aecc17eacc2e3d3f5cf4b0ff4183f29b33440..7d809b7e0504eb345f1dfe355bc589db6cfd3ae3 100644 (file)
--- 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

diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index 9fd0ba90c1d29ff78ed04ca80580e1c8be89cd0a..54ee265dd81923a4ec85d3c309d56c4dc9235c32 100644 (file)
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -10,9 +10,15 @@
 
 #include <asm/unistd.h>
 #include <asm/ftrace.h>
-#include <mach/entry-macro.S>
 #include <asm/unwind.h>
 
+#ifdef CONFIG_NEED_RET_TO_USER
+#include <mach/entry-macro.S>
+#else
+       .macro  arch_ret_to_user, tmp1, tmp2
+       .endm
+#endif
+
 #include "entry-header.S"