linux-kernel - [ 105/120] efi: Build EFI stub with EFI-appropriate options

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Message-Id: <20121011005846.445969841@linuxfoundation.org>
Date:	Thu, 11 Oct 2012 10:00:57 +0900
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	alan@...rguk.ukuu.org.uk, Matthew Garrett <mjg@...hat.com>,
	Matt Fleming <matt.fleming@...el.com>,
	Josh Boyer <jwboyer@...hat.com>
Subject: [ 105/120] efi: Build EFI stub with EFI-appropriate options

3.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Matthew Garrett <mjg@...hat.com>

commit 9dead5bbb825d7c25c0400e61de83075046322d0 upstream.

We can't assume the presence of the red zone while we're still in a boot
services environment, so we should build with -fno-red-zone to avoid
problems. Change the size of wchar at the same time to make string handling
simpler.

Signed-off-by: Matthew Garrett <mjg@...hat.com>
Signed-off-by: Matt Fleming <matt.fleming@...el.com>
Acked-by: Josh Boyer <jwboyer@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/x86/boot/compressed/Makefile |    3 +++
 1 file changed, 3 insertions(+)

--- a/arch/x86/boot/compressed/Makefile
+++ b/arch/x86/boot/compressed/Makefile
@@ -28,6 +28,9 @@ VMLINUX_OBJS = $(obj)/vmlinux.lds $(obj)
 	$(obj)/string.o $(obj)/cmdline.o $(obj)/early_serial_console.o \
 	$(obj)/piggy.o
 
+$(obj)/eboot.o: KBUILD_CFLAGS += -fshort-wchar -mno-red-zone
+$(obj)/efi_stub_$(BITS).o: KBUILD_CLFAGS += -fshort-wchar -mno-red-zone
+
 ifeq ($(CONFIG_EFI_STUB), y)
 	VMLINUX_OBJS += $(obj)/eboot.o $(obj)/efi_stub_$(BITS).o
 endif


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