On 05/09/2012 01:07 PM, Michael S. Tsirkin wrote: > > In practice ATM any of the above will work. We probably don't even need > to add barrier() calls since what we do afterwards is apic access which > has an optimization barrier anyway. But I'm fine with adding them in > there just in case if that's what people want. > If you have the optimization barrier anyway, then I'd be fine with you just using __test_and_clear_bit() and add to a comment in arch/x86/include/asm/bitops.h that KVM needs it to be locally atomic. -hpa -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
