x86_64: prepare shared kernel/entry.S

Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86_64/kernel/Makefile

@@ -4,7 +4,7 @@
 
 extra-y 	:= head.o head64.o init_task_64.o vmlinux.lds
 EXTRA_AFLAGS	:= -traditional
-obj-y	:= process_64.o signal_64.o entry.o traps_64.o irq_64.o \
+obj-y	:= process_64.o signal_64.o entry_64.o traps_64.o irq_64.o \
 		ptrace_64.o time_64.o ioport_64.o ldt_64.o setup_64.o i8259_64.o sys_x86_64.o \
 		x8664_ksyms_64.o i387_64.o syscall.o vsyscall_64.o \
 		setup64.o bootflag.o e820_64.o reboot_64.o quirks.o i8237.o \