[PATCH v3] ARM: VExpress: Makefile: add armv7 flags for inline assmembly code compiling

[Chen Gang]

When 'vexpress' kernel is compiled for both v6 and v7, it can support
armv7 instructions in lower level modules, so need let compiler know
about it for related inline assembly code, or can not pass compiling.

The related failure command:

  arm-linux-gnueabi-gcc -Wp,-MD,arch/arm/mach-vexpress/.dcscb.o.d  -nostdinc -isystem /usr/lib/gcc/arm-linux-gnueabi/4.7/include -I/root/linux-next/arch/arm/include -Iarch/arm/include/generated  -Iinclude -I/root/linux-next/arch/arm/include/uapi -Iarch/arm/include/generated/uapi -I/root/linux-next/include/uapi -Iinclude/generated/uapi -include /root/linux-next/include/linux/kconfig.h -D__KERNEL__ -mlittle-endian -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -Wno-format-security -fno-delete-null-pointer-checks -Werror=implicit-int -Werror=strict-prototypes -Os -Wno-maybe-uninitialized -fno-dwarf2-cfi-asm -fno-omit-frame-pointer -mapcs -mno-sched-prolog -fstack-protector -mabi=aapcs-linux -mno-thumb-interwork -funwind-tables -marm -D__LINUX_ARM_ARCH__=6 -march=armv6k -mtune=arm1136j-s -msoft-float -Uarm -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining -Wframe-larger-than=1024 -Wno-unused-but-se
 t-variabl

e -fno-omit-frame-pointer -fno-optimize-sibling-calls -g -femit-struct-debug-baseonly -fno-var-tracking -pg -fno-inline-functions-called-once -Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow -fconserve-stack -DCC_HAVE_ASM_GOTO -I/root/linux-next/arch/arm/mach-vexpress/include -I/root/linux-next/arch/arm/plat-versatile/include -W     -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(dcscb)"  -D"KBUILD_MODNAME=KBUILD_STR(dcscb)" -c -o arch/arm/mach-vexpress/.tmp_dcscb.o arch/arm/mach-vexpress/dcscb.c

The related error:

  /tmp/ccOMIprI.s: Assembler messages:
  /tmp/ccOMIprI.s:507: Error: selected processor does not support ARM mode `isb '
  /tmp/ccOMIprI.s:513: Error: selected processor does not support ARM mode `isb '
  /tmp/ccOMIprI.s:514: Error: selected processor does not support ARM mode `dsb '
  /tmp/ccOMIprI.s:584: Error: selected processor does not support ARM mode `isb '
  /tmp/ccOMIprI.s:590: Error: selected processor does not support ARM mode `isb '
  /tmp/ccOMIprI.s:591: Error: selected processor does not support ARM mode `dsb '
  make[1]: *** [arch/arm/mach-vexpress/dcscb.o] Error 1
  make: *** [arch/arm/mach-vexpress] Error 2


Signed-off-by: Chen Gang <gang.chen at asianux.com>
---
 arch/arm/mach-vexpress/Makefile |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-vexpress/Makefile b/arch/arm/mach-vexpress/Makefile
index 36ea824..f224577 100644
--- a/arch/arm/mach-vexpress/Makefile
+++ b/arch/arm/mach-vexpress/Makefile
@@ -10,3 +10,6 @@ obj-$(CONFIG_ARCH_VEXPRESS_DCSCB)	+= dcscb.o	dcscb_setup.o
 obj-$(CONFIG_ARCH_VEXPRESS_TC2_PM)	+= tc2_pm.o spc.o
 obj-$(CONFIG_SMP)			+= platsmp.o
 obj-$(CONFIG_HOTPLUG_CPU)		+= hotplug.o
+
+CFLAGS_dcscb.o				+=-march=armv7-a
+CFLAGS_tc2_pm.o				+=-march=armv7-a
-- 
1.7.7.6