On Wed, Nov 17, 2010 at 6:40 PM, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote: > On Wed, 2010-11-17 at 10:18 +0800, Huang Ying wrote: >> >> cmpxchg has been used in that way by ftrace and perf for a long time. So >> I agree to make it a requirement on future architecture ports. > > Neither mandate an architecture do this though, only that when an > architecture wants to support either feature and has NMIs (not all archs > have NMI equivalents) it has to be safe. So we can make sure cmpxchg can be used in lock-less code on architectures with perf, irq_work or ftrace enabled? Best Regards, Huang Ying -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
