Building the Linux kernel with Clang and LLVM
 help / color / mirror / Atom feed
From: Nathan Chancellor <nathan@kernel.org>
To: Nathan Chancellor <nathan@kernel.org>,
	Nicolas Schier <nsc@kernel.org>,
	 Bill Wendling <morbo@google.com>,
	Justin Stitt <justinstitt@google.com>,
	 Nick Desaulniers <nick.desaulniers+lkml@gmail.com>
Cc: linux-kernel@vger.kernel.org, llvm@lists.linux.dev,
	 linux-kbuild@vger.kernel.org, Thomas Gleixner <tglx@kernel.org>,
	 Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	 Dave Hansen <dave.hansen@linux.intel.com>,
	x86@kernel.org,  "H. Peter Anvin" <hpa@zytor.com>
Subject: [PATCH 11/14] x86/build: Drop unused '-ffreestanding' addition to KBUILD_CFLAGS
Date: Tue, 28 Apr 2026 22:59:17 -0400	[thread overview]
Message-ID: <20260428-bump-minimum-supported-llvm-version-to-17-v1-11-81d9b2e8ee75@kernel.org> (raw)
In-Reply-To: <20260428-bump-minimum-supported-llvm-version-to-17-v1-0-81d9b2e8ee75@kernel.org>

Now that the minimum supported version of LLVM for building the kernel
has been raised to 17.0.1, the condition to add '-ffreestanding' to
KBUILD_CFLAGS for 32-bit x86 is always false, so the if block can be
removed.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
---
Cc: Thomas Gleixner <tglx@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: x86@kernel.org
Cc: H. Peter Anvin <hpa@zytor.com>
---
 arch/x86/Makefile | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 46fec0b08487..5720f2470cfc 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -124,11 +124,6 @@ ifeq ($(CONFIG_X86_32),y)
         include $(srctree)/arch/x86/Makefile_32.cpu
         KBUILD_CFLAGS += $(cflags-y)
 
-    ifneq ($(call clang-min-version, 160000),y)
-        # https://github.com/llvm/llvm-project/issues/53645
-        KBUILD_CFLAGS += -ffreestanding
-    endif
-
         percpu_seg := fs
 else
         BITS := 64

-- 
2.54.0


  parent reply	other threads:[~2026-04-29  3:00 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-04-29  2:59 [PATCH 00/14] Bump minimum version of LLVM for building the kernel to 17.0.1 Nathan Chancellor
2026-04-29  2:59 ` [PATCH 01/14] kbuild: " Nathan Chancellor
2026-05-05 15:27   ` Nicolas Schier
2026-05-05 18:26     ` Daniel Pereira
2026-05-06  6:21       ` Nathan Chancellor
2026-05-06 12:33         ` Daniel Pereira
2026-04-29  2:59 ` [PATCH 02/14] security/Kconfig.hardening: Remove tautological condition from CC_HAS_ZERO_CALL_USED_REGS Nathan Chancellor
2026-05-05 15:28   ` Nicolas Schier
2026-04-29  2:59 ` [PATCH 03/14] security/Kconfig.hardening: Remove tautological condition from FORTIFY_SOURCE Nathan Chancellor
2026-05-05 15:28   ` Nicolas Schier
2026-04-29  2:59 ` [PATCH 04/14] security/Kconfig.hardening: Remove tautological condition from CC_HAS_RANDSTRUCT Nathan Chancellor
2026-05-05 15:28   ` Nicolas Schier
2026-04-29  2:59 ` [PATCH 05/14] arch/Kconfig: Remove tautological conditions from HAS_LTO_CLANG Nathan Chancellor
2026-05-05 15:30   ` Nicolas Schier
2026-04-29  2:59 ` [PATCH 06/14] arch/Kconfig: Remove tautological condition from AUTOFDO_CLANG Nathan Chancellor
2026-04-29 16:43   ` Rong Xu
2026-04-29  2:59 ` [PATCH 07/14] ARM: Drop tautological ld.lld conditions from ARCH_MULTI_V4{,T} Nathan Chancellor
2026-04-29  2:59 ` [PATCH 08/14] riscv: Remove tautological condition from selection of ARCH_SUPPORTS_CFI Nathan Chancellor
2026-04-29  2:59 ` [PATCH 09/14] riscv: Drop tautological condition from TOOLCHAIN_NEEDS_OLD_ISA_SPEC Nathan Chancellor
2026-04-29  2:59 ` [PATCH 10/14] scripts/Makefile.warn: Drop -Wformat handling for clang < 16 Nathan Chancellor
2026-05-05 15:31   ` Nicolas Schier
2026-04-29  2:59 ` Nathan Chancellor [this message]
2026-04-29 17:24   ` [PATCH 11/14] x86/build: Drop unused '-ffreestanding' addition to KBUILD_CFLAGS Nathan Chancellor
2026-04-29  2:59 ` [PATCH 12/14] x86/module: Revert "Deal with GOT based stack cookie load on Clang < 17" Nathan Chancellor
2026-04-29  7:10   ` Ard Biesheuvel
2026-04-29  2:59 ` [PATCH 13/14] x86/entry/vdso32: Remove conditional omission of '.cfi_offset eflags' Nathan Chancellor
2026-04-29  3:15   ` H. Peter Anvin
2026-04-29  2:59 ` [PATCH 14/14] kbuild: Remove check for broken scoping with clang < 17 in CC_HAS_ASM_GOTO_OUTPUT Nathan Chancellor
2026-05-05 15:32   ` Nicolas Schier

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20260428-bump-minimum-supported-llvm-version-to-17-v1-11-81d9b2e8ee75@kernel.org \
    --to=nathan@kernel.org \
    --cc=bp@alien8.de \
    --cc=dave.hansen@linux.intel.com \
    --cc=hpa@zytor.com \
    --cc=justinstitt@google.com \
    --cc=linux-kbuild@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=llvm@lists.linux.dev \
    --cc=mingo@redhat.com \
    --cc=morbo@google.com \
    --cc=nick.desaulniers+lkml@gmail.com \
    --cc=nsc@kernel.org \
    --cc=tglx@kernel.org \
    --cc=x86@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox