x86: Use default stack boundary alignment
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@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
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 @@
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