Hi Nathan, On Sat, Oct 25, 2025 at 1:53 PM Nathan Chancellor <[email protected]> wrote: > > Prior to clang 22.0.0 [1], ARM did not have an architecture specific > kCFI bundle lowering in the backend, which may cause issues. Select > CONFIG_ARCH_USES_CFI_GENERIC_LLVM_PASS to enable use of __nocfi_generic. > > Link: > https://github.com/llvm/llvm-project/commit/d130f402642fba3d065aacb506cb061c899558de > [1] > Link: https://github.com/ClangBuiltLinux/linux/issues/2124 > Signed-off-by: Nathan Chancellor <[email protected]> > --- > arch/arm/Kconfig | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig > index 2e3f93b690f4..4fb985b76e97 100644 > --- a/arch/arm/Kconfig > +++ b/arch/arm/Kconfig > @@ -44,6 +44,8 @@ config ARM > select ARCH_USE_BUILTIN_BSWAP > select ARCH_USE_CMPXCHG_LOCKREF > select ARCH_USE_MEMTEST > + # > https://github.com/llvm/llvm-project/commit/d130f402642fba3d065aacb506cb061c899558de > + select ARCH_USES_CFI_GENERIC_LLVM_PASS if CLANG_VERSION < 220000
Instead of working around issues with the generic pass, would it make more sense to just disable arm32 CFI with older Clang versions entirely? Linus, any thoughts? Sami
