The newer GNU assembler may not generate a symbol table for the empty object file. Since objtool doesn't like empty object files without symbol table and thunk_$(BITS).o doesn't have a symbol table when CONFIG_PREEMPTION isn't enabled, include thunk_$(BITS).o only if CONFIG_PREEMPTION is enabled.
Signed-off-by: H.J. Lu <hjl.to...@gmail.com> --- arch/x86/entry/Makefile | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/entry/Makefile b/arch/x86/entry/Makefile index 08bf95dbc911..83c98dae74a6 100644 --- a/arch/x86/entry/Makefile +++ b/arch/x86/entry/Makefile @@ -21,12 +21,13 @@ CFLAGS_syscall_64.o += $(call cc-option,-Wno-override-init,) CFLAGS_syscall_32.o += $(call cc-option,-Wno-override-init,) CFLAGS_syscall_x32.o += $(call cc-option,-Wno-override-init,) -obj-y := entry_$(BITS).o thunk_$(BITS).o syscall_$(BITS).o +obj-y := entry_$(BITS).o syscall_$(BITS).o obj-y += common.o obj-y += vdso/ obj-y += vsyscall/ +obj-$(CONFIG_PREEMPTION) += thunk_$(BITS).o obj-$(CONFIG_IA32_EMULATION) += entry_64_compat.o syscall_32.o obj-$(CONFIG_X86_X32_ABI) += syscall_x32.o -- 2.29.2
