[SPARC]: Build problem in ksyms.

arch/sparc/kernel/sparc_ksyms.c

@@ -103,7 +103,8 @@ __attribute__((section("__ksymtab"))) =				\
 /* used by various drivers */
 EXPORT_SYMBOL(sparc_cpu_model);
 EXPORT_SYMBOL(kernel_thread);
-#ifdef SPIN_LOCK_DEBUG
+#ifdef CONFIG_DEBUG_SPINLOCK
+#ifdef CONFIG_SMP
 EXPORT_SYMBOL(_do_spin_lock);
 EXPORT_SYMBOL(_do_spin_unlock);
 EXPORT_SYMBOL(_spin_trylock);
@@ -111,10 +112,12 @@ EXPORT_SYMBOL(_do_read_lock);
 EXPORT_SYMBOL(_do_read_unlock);
 EXPORT_SYMBOL(_do_write_lock);
 EXPORT_SYMBOL(_do_write_unlock);
+#endif
 #else
-EXPORT_SYMBOL_PRIVATE(_rw_read_enter);
-EXPORT_SYMBOL_PRIVATE(_rw_read_exit);
-EXPORT_SYMBOL_PRIVATE(_rw_write_enter);
+// XXX find what uses (or used) these.
+// EXPORT_SYMBOL_PRIVATE(_rw_read_enter);
+// EXPORT_SYMBOL_PRIVATE(_rw_read_exit);
+// EXPORT_SYMBOL_PRIVATE(_rw_write_enter);
 #endif
 /* semaphores */
 EXPORT_SYMBOL(__up);