linux-kernel - [PATCH 5/6] x86/build: Remove cc-option from -mskip-rax-setup

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Message-Id: <20250814-x86-min-ver-cleanups-v1-5-ff7f19457523@kernel.org>
Date: Thu, 14 Aug 2025 18:31:41 -0700
From: Nathan Chancellor <nathan@...nel.org>
To: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, 
 Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>, 
 x86@...nel.org
Cc: linux-kernel@...r.kernel.org, llvm@...ts.linux.dev, 
 patches@...ts.linux.dev, Nathan Chancellor <nathan@...nel.org>
Subject: [PATCH 5/6] x86/build: Remove cc-option from -mskip-rax-setup

This has been supported in GCC since 5.1 and clang since 14.0. Now that
x86 requires LLVM 15 or newer since commit 7861640aac52 ("x86/build:
Raise the minimum LLVM version to 15.0.0"), this flag can be
unconditionally added, saving a compiler invocation.

Link: https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=fbe575b652f5bdcc459f447a0e6f0e059996d4ef
Link: https://github.com/llvm/llvm-project/commit/a9fba2be35db674971382e38b99a31403444d9bf
Signed-off-by: Nathan Chancellor <nathan@...nel.org>
---
 arch/x86/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 1bbf943fe9e1..4b4e2a3ac6df 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -160,7 +160,7 @@ else
         KBUILD_CFLAGS += $(cc_stack_align8)
 
 	# Use -mskip-rax-setup if supported.
-	KBUILD_CFLAGS += $(call cc-option,-mskip-rax-setup)
+	KBUILD_CFLAGS += -mskip-rax-setup
 
 ifdef CONFIG_X86_NATIVE_CPU
         KBUILD_CFLAGS += -march=native

-- 
2.50.1