[PATCH] Disable -fconserve-stack on ARM
From: Andi Kleen <hidden>
Date: 2011-05-28 15:34:21
Also in:
lkml
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
Here's a untested but straight forward patch to disable it. -Andi --- Disable -fconserve-stack on ARM There are reports that -fconserve-stack misaligns variables on the stack. Disable it for ARM to work around this gcc bug. Signed-off-by: Andi Kleen <redacted>
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 25750bc..0883cff 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile@@ -41,6 +41,10 @@ ifeq ($(CONFIG_CC_STACKPROTECTOR),y) KBUILD_CFLAGS +=-fstack-protector endif +# ARM gcc developers unfortunately broke -fconserve-stack. It misaligns +# variables on the stack +KBUILD_CFLAGS += $(call cc-option,-fno-conserve-stack) + ifeq ($(CONFIG_CPU_BIG_ENDIAN),y) KBUILD_CPPFLAGS += -mbig-endian AS += -EB