From: Tiezhu Yang Date: Tue, 17 Dec 2024 01:09:03 +0000 (+0800) Subject: LoongArch: Enable jump table for objtool X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=e20ab7d454ee8d1e0e8b9ff73a7c87e84c666b2f;p=users%2Fjedix%2Flinux-maple.git LoongArch: Enable jump table for objtool For now, it is time to remove -fno-jump-tables to enable jump table for objtool if the compiler has -mannotate-tablejump, otherwise it is better to remain -fno-jump-tables to keep compatibility with older compilers. Signed-off-by: Tiezhu Yang Link: https://lore.kernel.org/r/20241217010905.13054-8-yangtiezhu@loongson.cn Acked-by: Huacai Chen Signed-off-by: Josh Poimboeuf --- diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index 2b8bd27a852f..15aaa2e6757e 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -291,6 +291,9 @@ config AS_HAS_LBT_EXTENSION config AS_HAS_LVZ_EXTENSION def_bool $(as-instr,hvcl 0) +config CC_HAS_ANNOTATE_TABLEJUMP + def_bool $(cc-option,-mannotate-tablejump) + menu "Kernel type and options" source "kernel/Kconfig.hz" diff --git a/arch/loongarch/Makefile b/arch/loongarch/Makefile index 567bd122a9ee..0304eabbe606 100644 --- a/arch/loongarch/Makefile +++ b/arch/loongarch/Makefile @@ -101,7 +101,11 @@ KBUILD_AFLAGS += $(call cc-option,-mthin-add-sub) $(call cc-option,-Wa$(comma) KBUILD_CFLAGS += $(call cc-option,-mthin-add-sub) $(call cc-option,-Wa$(comma)-mthin-add-sub) ifdef CONFIG_OBJTOOL -KBUILD_CFLAGS += -fno-jump-tables +ifdef CONFIG_CC_HAS_ANNOTATE_TABLEJUMP +KBUILD_CFLAGS += -mannotate-tablejump +else +KBUILD_CFLAGS += -fno-jump-tables # keep compatibility with older compilers +endif endif KBUILD_RUSTFLAGS += --target=loongarch64-unknown-none-softfloat -Ccode-model=small