[SPARC]: Add rtc_lock.

arch/sparc/kernel/sparc_ksyms.c

@@ -55,6 +55,8 @@
 #include <asm/a.out.h>
 #include <asm/io-unit.h>
 
+extern spinlock_t rtc_lock;
+
 struct poll {
 	int fd;
 	short events;
@@ -152,6 +154,7 @@ EXPORT_SYMBOL(__cpu_logical_map);
 
 EXPORT_SYMBOL(udelay);
 EXPORT_SYMBOL(ndelay);
+EXPORT_SYMBOL(rtc_lock);
 EXPORT_SYMBOL(mostek_lock);
 EXPORT_SYMBOL(mstk48t02_regs);
 #if CONFIG_SUN_AUXIO

arch/sparc/kernel/time.c

@@ -47,6 +47,7 @@ extern unsigned long wall_jiffies;
 
 u64 jiffies_64;
 
+spinlock_t rtc_lock = SPIN_LOCK_UNLOCKED;
 enum sparc_clock_type sp_clock_typ;
 spinlock_t mostek_lock = SPIN_LOCK_UNLOCKED;
 unsigned long mstk48t02_regs = 0UL;