[U-Boot] [PATCH 1/2] x86: Use default stack boundary alignment

[Bin Meng]

At present U-Boot x86 build is using -mpreferred-stack-boundary=2
which is 4 bytes stack boundary alignment. With 64-bit U-Boot, the
minimal required stack boundary alignment is 16 bytes.

If -mpreferred-stack-boundary is not specified, the default is 4
(16 bytes). Switch to use the default one.

Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
---

 arch/x86/config.mk | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/x86/config.mk b/arch/x86/config.mk
index 74b87ce..043425e 100644
--- a/arch/x86/config.mk
+++ b/arch/x86/config.mk
@@ -10,8 +10,7 @@ CONFIG_STANDALONE_LOAD_ADDR ?= 0x40000
 PLATFORM_CPPFLAGS += -fno-strict-aliasing
 PLATFORM_CPPFLAGS += -fomit-frame-pointer
 PF_CPPFLAGS_X86   := $(call cc-option, -fno-toplevel-reorder, \
-		       $(call cc-option, -fno-unit-at-a-time)) \
-		     $(call cc-option, -mpreferred-stack-boundary=2)
+		     $(call cc-option, -fno-unit-at-a-time))
 
 PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_X86)
 PLATFORM_CPPFLAGS += -fno-dwarf2-cfi-asm
-- 
2.9.2