From: Borislav Petkov <bp@suse.de>
To: Stuart Little <achirvasub@gmail.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>,
Alexander Potapenko <glider@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
Marco Elver <elver@google.com>, Arnd Bergmann <arnd@arndb.de>,
linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
kasan-dev@googlegroups.com, jpoimboe@redhat.com,
nborisov@suse.com, seth.forshee@canonical.com,
yamada.masahiro@socionext.com
Subject: Re: PROBLEM: 5.11.0-rc7 fails to compile with error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible
Date: Mon, 8 Feb 2021 13:12:27 +0100 [thread overview]
Message-ID: <20210208121227.GD17908@zn.tnic> (raw)
In-Reply-To: <YCCIgMHkzh/xT4ex@arch-chirva.localdomain>
On Sun, Feb 07, 2021 at 07:40:32PM -0500, Stuart Little wrote:
> > On Sun, Feb 07, 2021 at 06:31:22PM -0500, Stuart Little wrote:
> > > I am trying to compile on an x86_64 host for a 32-bit system; my config is at
> > >
> > > https://termbin.com/v8jl
> > >
> > > I am getting numerous errors of the form
> > >
> > > ./include/linux/kasan-checks.h:17:1: error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible
Does this fix it?
---
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 5857917f83ee..30920d70b48b 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -50,6 +50,9 @@ export BITS
KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow
KBUILD_CFLAGS += $(call cc-option,-mno-avx,)
+# Intel CET isn't enabled in the kernel
+KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none)
+
ifeq ($(CONFIG_X86_32),y)
BITS := 32
UTS_MACHINE := i386
@@ -120,9 +123,6 @@ else
KBUILD_CFLAGS += -mno-red-zone
KBUILD_CFLAGS += -mcmodel=kernel
-
- # Intel CET isn't enabled in the kernel
- KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none)
endif
ifdef CONFIG_X86_X32
--
Regards/Gruss,
Boris.
SUSE Software Solutions Germany GmbH, GF: Felix Imendörffer, HRB 36809, AG Nürnberg
next prev parent reply other threads:[~2021-02-08 12:13 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-07 23:31 PROBLEM: 5.11.0-rc7 fails to compile with error: ‘-mindirect-branch’ and ‘-fcf-protection’ are not compatible Stuart Little
2021-02-08 0:26 ` Stuart Little
2021-02-08 0:40 ` Stuart Little
2021-02-08 9:51 ` Marco Elver
2021-02-08 12:12 ` Borislav Petkov [this message]
2021-02-08 15:19 ` AC
2021-02-08 16:25 ` [PATCH] x86/build: Disable CET instrumentation in the kernel for 32-bit too Borislav Petkov
2021-02-08 18:12 ` Josh Poimboeuf
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