From: Tiezhu Yang Date: Tue, 17 Sep 2024 14:23:09 +0000 (+0800) Subject: LoongArch: Set AS_HAS_THIN_ADD_SUB as y if AS_IS_LLVM X-Git-Tag: v6.12-rc1~27^2~11 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=a7e0837724562ea8c1d869dd1a5cb1119ef651c3;p=thirdparty%2Fkernel%2Flinux.git LoongArch: Set AS_HAS_THIN_ADD_SUB as y if AS_IS_LLVM When building kernel with "make CC=clang defconfig", LLVM Assembler is used due to LLVM_IAS=0 is not specified, then AS_HAS_THIN_ADD_SUB is not set, thus objtool can not be built after enable it for Clang. config AS_HAS_THIN_ADD_SUB is to check whether -mthin-add-sub option is available to know R_LARCH_{32,64}_PCREL are supported for GNU Assembler, there is no such an option for LLVM Assembler. The minimal version of Clang is 18 for building LoongArch kernel, and Clang >= 17 has already supported R_LARCH_{32,64}_PCREL, that is to say, there is no need to depend on AS_HAS_THIN_ADD_SUB for Clang, so just set AS_HAS_THIN_ADD_SUB as y if AS_IS_LLVM. Fixes: 120dd4118e58 ("LoongArch: Only allow OBJTOOL & ORC unwinder if toolchain supports -mthin-add-sub") Signed-off-by: Tiezhu Yang Signed-off-by: Huacai Chen --- diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index 8dff6ddaf9c56..34531dc8a61f2 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -266,7 +266,7 @@ config AS_HAS_FCSR_CLASS def_bool $(as-instr,movfcsr2gr \$t0$(comma)\$fcsr0) config AS_HAS_THIN_ADD_SUB - def_bool $(cc-option,-Wa$(comma)-mthin-add-sub) + def_bool $(cc-option,-Wa$(comma)-mthin-add-sub) || AS_IS_LLVM config AS_HAS_LSX_EXTENSION def_bool $(as-instr,vld \$vr0$(comma)\$a0$(comma)0)