linux-kernel - [tip: x86/build] x86/build: Remove cc-option from -mno-fp-ret-in-387

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Message-ID: <175542429414.1420.18313894506338628845.tip-bot2@tip-bot2>
Date: Sun, 17 Aug 2025 09:51:33 -0000
From: "tip-bot2 for Nathan Chancellor" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Nathan Chancellor <nathan@...nel.org>,
 "Borislav Petkov (AMD)" <bp@...en8.de>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: x86/build] x86/build: Remove cc-option from -mno-fp-ret-in-387

The following commit has been merged into the x86/build branch of tip:

Commit-ID:     0a42d732c136d3466cd19fafa7317d3004430318
Gitweb:        https://git.kernel.org/tip/0a42d732c136d3466cd19fafa7317d3004430318
Author:        Nathan Chancellor <nathan@...nel.org>
AuthorDate:    Thu, 14 Aug 2025 18:31:40 -07:00
Committer:     Borislav Petkov (AMD) <bp@...en8.de>
CommitterDate: Sun, 17 Aug 2025 11:36:47 +02:00

x86/build: Remove cc-option from -mno-fp-ret-in-387

This has been supported in GCC for forever and clang gained support for it as
an alias of '-mno-x87' in LLVM 14. Now that x86 requires LLVM 15 or newer
since

  7861640aac52 ("x86/build: Raise the minimum LLVM version to 15.0.0"),

this flag can be unconditionally added, saving a compiler invocation.

Signed-off-by: Nathan Chancellor <nathan@...nel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
Link: https://github.com/llvm/llvm-project/commit/a9fba2be35db674971382e38b99a31403444d9bf
Link: https://lore.kernel.org/20250814-x86-min-ver-cleanups-v1-4-ff7f19457523@kernel.org
---
 arch/x86/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 0c82a61..1bbf943 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -148,7 +148,7 @@ else
 
         # Don't autogenerate traditional x87 instructions
         KBUILD_CFLAGS += -mno-80387
-        KBUILD_CFLAGS += $(call cc-option,-mno-fp-ret-in-387)
+        KBUILD_CFLAGS += -mno-fp-ret-in-387
 
         # By default gcc and clang use a stack alignment of 16 bytes for x86.
         # However the standard kernel entry on x86-64 leaves the stack on an