s390 and x86 have required LLVM 15 since
30d17fac6aae ("scripts/min-tool-version.sh: raise minimum clang version to
15.0.0 for s390")
7861640aac52 ("x86/build: Raise the minimum LLVM version to 15.0.0")
respectively. This series bumps the rest of the kernel to 15.0.0 to
match, which allows for a decent number of clean ups.
On the distros front, we will only leave behind Debian Bookworm and
Ubuntu Jammy. In both of those cases, builders / developers can either
use the kernel.org toolchains or https://apt.llvm.org to get newer
versions that will run on those distributions, if they cannot upgrade.
archlinux:latest clang version 20.1.8
debian:oldoldstable-slim Debian clang version 11.0.1-2
debian:oldstable-slim Debian clang version 14.0.6
debian:stable-slim Debian clang version 19.1.7 (3+b1)
debian:testing-slim Debian clang version 19.1.7 (3+b1)
debian:unstable-slim Debian clang version 19.1.7 (3+b2)
fedora:41 clang version 19.1.7 (Fedora 19.1.7-4.fc41)
fedora:latest clang version 20.1.8 (Fedora 20.1.8-3.fc42)
fedora:rawhide clang version 20.1.8 (Fedora 20.1.8-3.fc43)
opensuse/leap:latest clang version 17.0.6
opensuse/tumbleweed:latest clang version 20.1.8
ubuntu:focal clang version 10.0.0-4ubuntu1
ubuntu:jammy Ubuntu clang version 14.0.0-1ubuntu1.1
ubuntu:noble Ubuntu clang version 18.1.3 (1ubuntu1)
ubuntu:latest Ubuntu clang version 18.1.3 (1ubuntu1)
ubuntu:rolling Ubuntu clang version 20.1.2 (0ubuntu1)
ubuntu:devel Ubuntu clang version 20.1.8 (0ubuntu1)
I think it makes sense for either Andrew to carry this via -mm on a
nonmm branch or me to carry this via the Kbuild tree, with the
appropriate acks.
---
Nathan Chancellor (10):
kbuild: Bump minimum version of LLVM for building the kernel to 15.0.0
arch/Kconfig: Drop always true condition from RANDOMIZE_KSTACK_OFFSET
ARM: Clean up definition of ARM_HAS_GROUP_RELOCS
arm64: Remove tautological LLVM Kconfig conditions
mips: Unconditionally select ARCH_HAS_CURRENT_STACK_POINTER
powerpc: Drop unnecessary initializations in
__copy_inst_from_kernel_nofault()
riscv: Remove version check for LTO_CLANG selects
lib/Kconfig.debug: Drop CLANG_VERSION check from
DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT
objtool: Drop noinstr hack for KCSAN_WEAK_MEMORY
KMSAN: Remove tautological checks
Documentation/process/changes.rst | 2 +-
arch/Kconfig | 1 -
arch/arm/Kconfig | 11 ++++-------
arch/arm64/Kconfig | 5 +----
arch/mips/Kconfig | 2 +-
arch/powerpc/include/asm/inst.h | 4 ----
arch/riscv/Kconfig | 5 ++---
lib/Kconfig.debug | 2 +-
lib/Kconfig.kcsan | 6 ------
lib/Kconfig.kmsan | 11 +----------
scripts/min-tool-version.sh | 6 ++----
tools/objtool/check.c | 10 ----------
12 files changed, 13 insertions(+), 52 deletions(-)
---
base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585
change-id: 20250710-bump-min-llvm-ver-15-95231f1eb655
Best regards,
--
Nathan Chancellor <nat...@kernel.org>
