The patch titled
Subject: arm64: Kconfig: clean up tautological LLVM version checks
has been added to the -mm mm-nonmm-unstable branch. Its filename is
arm64-kconfig-clean-up-tautological-llvm-version-checks.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/arm64-kconfig-clean-up-tautological-llvm-version-checks.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: arm64: Kconfig: clean up tautological LLVM version checks
Date: Thu, 25 Jan 2024 15:55:11 -0700
Now that the minimum supported version of LLVM for building the kernel has
been bumped to 13.0.1, several conditions become tautologies, as they will
always be true because the build will fail during the configuration stage
for older LLVM versions. Drop them, as they are unnecessary.
Link: https://lkml.kernel.org/r/20240125-bump-min-llvm-ver-to-13-0-1-v1-5-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/arm64/Kconfig | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
--- a/arch/arm64/Kconfig~arm64-kconfig-clean-up-tautological-llvm-version-checks
+++ a/arch/arm64/Kconfig
@@ -384,7 +384,7 @@ config BUILTIN_RETURN_ADDRESS_STRIPS_PAC
bool
# Clang's __builtin_return_adddress() strips the PAC since 12.0.0
# https://github.com/llvm/llvm-project/commit/2a96f47c5ffca84cd774ad402cacd137f4bf45e2
- default y if CC_IS_CLANG && (CLANG_VERSION >= 120000)
+ default y if CC_IS_CLANG
# GCC's __builtin_return_address() strips the PAC since 11.1.0,
# and this was backported to 10.2.0, 9.4.0, 8.5.0, but not earlier
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94891
@@ -1388,7 +1388,6 @@ choice
config CPU_BIG_ENDIAN
bool "Build big-endian kernel"
- depends on !LD_IS_LLD || LLD_VERSION >= 130000
# https://github.com/llvm/llvm-project/commit/1379b150991f70a5782e9a143c2ba5308da1161c
depends on AS_IS_GNU || AS_VERSION >= 150000
help
@@ -2019,8 +2018,6 @@ config ARM64_BTI_KERNEL
depends on !CC_IS_GCC || GCC_VERSION >= 100100
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106671
depends on !CC_IS_GCC
- # https://github.com/llvm/llvm-project/commit/a88c722e687e6780dcd6a58718350dc76fcc4cc9
- depends on !CC_IS_CLANG || CLANG_VERSION >= 120000
depends on (!FUNCTION_GRAPH_TRACER || DYNAMIC_FTRACE_WITH_ARGS)
help
Build the kernel with Branch Target Identification annotations
_
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
