Is it worth considering a move towards using C11 atomics and barriers and compiler intrinsics inside the kernel? The compiler _ought_ to be able to do these. One thing I'm not sure of, though, is how well gcc's atomics will cope with interrupt handlers touching atomics on CPUs without suitable atomic instructions - that said, userspace does have to deal with signals getting underfoot. but then userspace can't normally disable interrupts. David -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html