If you are redoing it then please get the comments a bit cleared up. The heaviness of the fallback version of this_cpu_read/write can usually easily be remedied by arch specific definitions. The per cpu offset is somewhere in a register and one needs to define a macro that creates an instruction that does a fetch from that register plus the current offset into the area that is needed. This is similarly easy for the write path. But then its often easier to just use the __this_cpu instructions since preemption is often off in these code paths.
I have had code for IA64 in the past that does this. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
