From: Nathan Chancellor <nathan@kernel.org>
To: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org
Cc: Peter Zijlstra <peterz@infradead.org>,
Nick Desaulniers <ndesaulniers@google.com>,
linux-kernel@vger.kernel.org, llvm@lists.linux.dev,
Nathan Chancellor <nathan@kernel.org>
Subject: [PATCH] x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block
Date: Wed, 17 Aug 2022 11:54:11 -0700 [thread overview]
Message-ID: <20220817185410.1174782-1-nathan@kernel.org> (raw)
LLVM 16 will have support for this flag so move it out of the GCC-only
block to allow LLVM builds to take advantage of it.
Link: https://github.com/ClangBuiltLinux/linux/issues/1665
Link: https://github.com/llvm/llvm-project/commit/6f867f9102838ebe314c1f3661fdf95700386e5a
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
---
I was not sure if this information is relevant for the commit message
but I can boot without any issues on my test machines (two Intel and one
AMD).
arch/x86/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 7854685c5f25..987da87c7778 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -14,13 +14,13 @@ endif
ifdef CONFIG_CC_IS_GCC
RETPOLINE_CFLAGS := $(call cc-option,-mindirect-branch=thunk-extern -mindirect-branch-register)
-RETPOLINE_CFLAGS += $(call cc-option,-mindirect-branch-cs-prefix)
RETPOLINE_VDSO_CFLAGS := $(call cc-option,-mindirect-branch=thunk-inline -mindirect-branch-register)
endif
ifdef CONFIG_CC_IS_CLANG
RETPOLINE_CFLAGS := -mretpoline-external-thunk
RETPOLINE_VDSO_CFLAGS := -mretpoline
endif
+RETPOLINE_CFLAGS += $(call cc-option,-mindirect-branch-cs-prefix)
ifdef CONFIG_RETHUNK
RETHUNK_CFLAGS := -mfunction-return=thunk-extern
base-commit: 568035b01cfb107af8d2e4bd2fb9aea22cf5b868
--
2.37.2
next reply other threads:[~2022-08-17 18:56 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-17 18:54 Nathan Chancellor [this message]
2022-08-17 22:08 ` [PATCH] x86/build: Move '-mindirect-branch-cs-prefix' out of GCC-only block Nick Desaulniers
2022-08-18 7:45 ` Peter Zijlstra
2022-08-18 8:00 ` Peter Zijlstra
2022-09-30 18:10 ` Nick Desaulniers
2022-10-04 21:27 ` Nick Desaulniers
2022-10-06 17:56 ` Nick Desaulniers
2022-08-18 7:49 ` Peter Zijlstra
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