x86_64: prepare shared lib/rwlock.S

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

arch/x86_64/lib/Makefile

@@ -10,4 +10,4 @@ obj-$(CONFIG_SMP)	+= msr-on-cpu.o
 lib-y := csum-partial.o csum-copy_64.o csum-wrappers.o delay.o \
 	usercopy.o getuser.o putuser.o  \
 	thunk_64.o clear_page_64.o copy_page_64.o bitstr_64.o bitops.o
-lib-y += memcpy.o memmove.o memset.o copy_user.o rwlock.o copy_user_nocache.o
+lib-y += memcpy.o memmove.o memset.o copy_user.o rwlock_64.o copy_user_nocache.o