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[5.10,20/41] x86/build: Turn off -fcf-protection for realmode targets

Message ID 20210409095305.483201173@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman April 9, 2021, 9:53 a.m. UTC 
From: Arnd Bergmann <arnd@arndb.de>


[ Upstream commit 9fcb51c14da2953de585c5c6e50697b8a6e91a7b ]

The new Ubuntu GCC packages turn on -fcf-protection globally,
which causes a build failure in the x86 realmode code:

  cc1: error: ‘-fcf-protection’ is not compatible with this target

Turn it off explicitly on compilers that understand this option.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Link: https://lore.kernel.org/r/20210323124846.1584944-1-arnd@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

---
 arch/x86/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.30.2
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Patch

diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 0a6d497221e4..9c86f2dc16b1 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -34,7 +34,7 @@  M16_CFLAGS	 := $(call cc-option, -m16, $(CODE16GCC_CFLAGS))
 REALMODE_CFLAGS	:= $(M16_CFLAGS) -g -Os -DDISABLE_BRANCH_PROFILING \
 		   -Wall -Wstrict-prototypes -march=i386 -mregparm=3 \
 		   -fno-strict-aliasing -fomit-frame-pointer -fno-pic \
-		   -mno-mmx -mno-sse
+		   -mno-mmx -mno-sse $(call cc-option,-fcf-protection=none)
 
 REALMODE_CFLAGS += -ffreestanding
 REALMODE_CFLAGS += -fno-stack-protector