[PATCH] ia32 sched_clock() deadlock fix
From: Ingo Molnar <mingo@elte.hu>, Voyager is getting odd deadlocks due to the taking of xtime_lock() in sched_clock()->get_jiffies_64(). I had this patch queued up to fix a different deadlock, which occurs when we relax the requirement that TSC's be synchronised across CPUs. But it will fix James' deadlock too.
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