The code that Fabio proposes looks like this:
sx_slock(&data->lock);
if (data->buffer)
a = *data->buffer;
sx_sunlock(&data->lock);This point is that without a memory barrier on the unlock, the CPU is free to reorder the instructions into the order is his message. _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
