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riscv: Drop tautological condition from TOOLCHAIN_NEEDS_OLD_ISA_SPEC

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Now that the minimum supported version of LLVM for building the kernel
has been raised to 17.0.1, the Clang dependency part of
CONFIG_TOOLCHAIN_NEEDS_OLD_ISA_SPEC is always false, so it can be
removed. Adjust the help text to remove mention of Clang < 17, as it is
irrelevant for the kernel after the minimum supported bump.

Acked-by: Paul Walmsley <pjw@kernel.org>  # arch/riscv
Link: https://patch.msgid.link/20260517-bump-minimum-supported-llvm-version-to-17-v2-9-b3b8cda46bdd@kernel.org
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
This commit is contained in:
Nathan Chancellor 2026-05-17 13:05:12 -10:00
parent 62c4af8689
commit 7e279976cf
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1 changed files with 6 additions and 7 deletions
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arch/riscv/Kconfig
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@ -873,19 +873,18 @@ config TOOLCHAIN_NEEDS_EXPLICIT_ZICSR_ZIFENCEI
and Zifencei are supported in binutils from version 2.36 onwards.
To make life easier, and avoid forcing toolchains that default to a
newer ISA spec to version 2.2, relax the check to binutils >= 2.36.
For clang < 17 or GCC < 11.3.0, for which this is not possible or need
special treatment, this is dealt with in TOOLCHAIN_NEEDS_OLD_ISA_SPEC.
For GCC < 11.3.0, for which this is not possible or need special
treatment, this is dealt with in TOOLCHAIN_NEEDS_OLD_ISA_SPEC.
config TOOLCHAIN_NEEDS_OLD_ISA_SPEC
def_bool y
depends on TOOLCHAIN_NEEDS_EXPLICIT_ZICSR_ZIFENCEI
# https://github.com/llvm/llvm-project/commit/22e199e6afb1263c943c0c0d4498694e15bf8a16
# https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=d29f5d6ab513c52fd872f532c492e35ae9fd6671
depends on (CC_IS_CLANG && CLANG_VERSION < 170000) || (CC_IS_GCC && GCC_VERSION < 110300)
depends on CC_IS_GCC && GCC_VERSION < 110300
help
Certain versions of clang and GCC do not support zicsr and zifencei via
-march. This option causes an older ISA spec compatible with these older
versions of clang and GCC to be passed to GAS, which has the same result
Certain versions of GCC do not support zicsr and zifencei via -march.
This option causes an older ISA spec compatible with these older
versions of GCC to be passed to GAS, which has the same result
as passing zicsr and zifencei to -march.
config FPU