The patch titled
Subject: x86: drop stack-alignment plugin opt
has been added to the -mm mm-nonmm-unstable branch. Its filename is
x86-drop-stack-alignment-plugin-opt.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/x86-drop-stack-alignment-plugin-opt.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Nathan Chancellor <nathan@xxxxxxxxxx>
Subject: x86: drop stack-alignment plugin opt
Date: Thu, 25 Jan 2024 15:55:09 -0700
Now that the minimum supported version of LLVM for building the kernel has
been bumped to 13.0.1, the inner ifeq statement is always false, as the
build will fail during the configuration stage for older LLVM versions.
This effectively reverts part of commit b33fff07e3e3 ("x86, build: allow
LTO to be selected") and its follow up fix, commit 2398ce80152a ("x86,
lto: Pass -stack-alignment only on LLD < 13.0.0").
Link: https://lkml.kernel.org/r/20240125-bump-min-llvm-ver-to-13-0-1-v1-3-f5ff9bda41c5@xxxxxxxxxx
Signed-off-by: Nathan Chancellor <nathan@xxxxxxxxxx>
Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Albert Ou <aou@xxxxxxxxxxxxxxxxx>
Cc: "Aneesh Kumar K.V (IBM)" <aneesh.kumar@xxxxxxxxxx>
Cc: Ard Biesheuvel <ardb@xxxxxxxxxx>
Cc: Borislav Petkov (AMD) <bp@xxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Conor Dooley <conor@xxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: "Naveen N. Rao" <naveen.n.rao@xxxxxxxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Cc: Nicolas Schier <nicolas@xxxxxxxxx>
Cc: Palmer Dabbelt <palmer@xxxxxxxxxxx>
Cc: Paul Walmsley <paul.walmsley@xxxxxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/Makefile | 6 ------
1 file changed, 6 deletions(-)
--- a/arch/x86/Makefile~x86-drop-stack-alignment-plugin-opt
+++ a/arch/x86/Makefile
@@ -217,12 +217,6 @@ endif
KBUILD_LDFLAGS += -m elf_$(UTS_MACHINE)
-ifdef CONFIG_LTO_CLANG
-ifeq ($(call test-lt, $(CONFIG_LLD_VERSION), 130000),y)
-KBUILD_LDFLAGS += -plugin-opt=-stack-alignment=$(if $(CONFIG_X86_32),4,8)
-endif
-endif
-
ifdef CONFIG_X86_NEED_RELOCS
LDFLAGS_vmlinux := --emit-relocs --discard-none
else
_
Patches currently in -mm which might be from nathan@xxxxxxxxxx are
selftests-bpf-update-llvm-phabricator-links.patch
arch-and-include-update-llvm-phabricator-links.patch
treewide-update-llvm-bugzilla-links.patch
kbuild-raise-the-minimum-supported-version-of-llvm-to-1301.patch
makefile-drop-warn-stack-size-plugin-opt.patch
x86-drop-stack-alignment-plugin-opt.patch
arm-remove-thumb2-__builtin_thread_pointer-workaround-for-clang.patch
arm64-kconfig-clean-up-tautological-llvm-version-checks.patch
powerpc-kconfig-remove-tautology-in-config_compat.patch
riscv-remove-mcount_name-workaround.patch
riscv-kconfig-remove-version-dependency-from-config_clang_supports_dynamic_ftrace.patch
fortify-drop-clang-version-check-for-1201-or-newer.patch
lib-kconfigdebug-update-clang-version-check-in-config_kcov.patch
compiler-clangh-update-__diag_clang-macros-for-minimum-version-bump.patch
