* This read-write spinlock protects us from races in SMP while
* playing with xtime and avenrun.
*/
-#ifndef ARCH_HAVE_XTIME_LOCK
-__cacheline_aligned_in_smp DEFINE_SEQLOCK(xtime_lock);
+__attribute__((weak)) __cacheline_aligned_in_smp DEFINE_SEQLOCK(xtime_lock);
EXPORT_SYMBOL(xtime_lock);
-#endif
/*
* This function runs timers and the timer-tq in bottom half context.