Building the Linux kernel with Clang and LLVM
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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, Kees Cook <kees@kernel.org>,
	 "Gustavo A. R. Silva" <gustavoars@kernel.org>,
	 linux-hardening@vger.kernel.org,
	linux-security-module@vger.kernel.org
Subject: [PATCH 04/14] security/Kconfig.hardening: Remove tautological condition from CC_HAS_RANDSTRUCT
Date: Tue, 28 Apr 2026 22:59:10 -0400	[thread overview]
Message-ID: <20260428-bump-minimum-supported-llvm-version-to-17-v1-4-81d9b2e8ee75@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 '!Clang || Clang >= 16' dependency for
CONFIG_CC_HAS_RANDSTRUCT is always true, so it can be removed.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>
---
Cc: Kees Cook <kees@kernel.org>
Cc: Gustavo A. R. Silva <gustavoars@kernel.org>
Cc: linux-hardening@vger.kernel.org
Cc: linux-security-module@vger.kernel.org
---
 security/Kconfig.hardening | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/security/Kconfig.hardening b/security/Kconfig.hardening
index e4f23c08a17a..b90cf9ed4642 100644
--- a/security/Kconfig.hardening
+++ b/security/Kconfig.hardening
@@ -274,9 +274,6 @@ endmenu
 
 config CC_HAS_RANDSTRUCT
 	def_bool $(cc-option,-frandomize-layout-seed-file=/dev/null)
-	# Randstruct was first added in Clang 15, but it isn't safe to use until
-	# Clang 16 due to https://github.com/llvm/llvm-project/issues/60349
-	depends on !CC_IS_CLANG || CLANG_VERSION >= 160000
 
 choice
 	prompt "Randomize layout of sensitive kernel structures"

-- 
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 ` Nathan Chancellor [this message]
2026-05-05 15:28   ` [PATCH 04/14] security/Kconfig.hardening: Remove tautological condition from CC_HAS_RANDSTRUCT 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 ` [PATCH 11/14] x86/build: Drop unused '-ffreestanding' addition to KBUILD_CFLAGS Nathan Chancellor
2026-04-29 17:24   ` 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

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