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 74b87ceac54b646fa17bfd34b50b5cf3defb67a6..043425e5e38eac9c79bfad10081d73b538e362cf 100644 (file)
--- 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