> > This is a long term plan, of course, but I'd like to see sysfs functions go > > away > > in a year or so. What do you think? > > hoo boy. Creating a /dev node and doing ioctls on it is really old > school. So old school that I've forgotten why we don't do it any more. > > Hopefully Alan can recall the thinking?
Gee.. pass me the walking stick and the pipe ! The problem we used to have with it was re-use of /dev nodes and permissions. For example if I create a ZRAM instance and then we crash and my /dev is persistent then next boot I can potentially be opening that left over node (or it may even be forgotten), which has old and stale permissions on it. With devtmpfs it's a bit easier and saner. The old abuser of this was the old PCMCIA layer which has more exciting versions of the problem as it used /tmp for some nodes. Switching to sysfs probably fits better but the problem is the generic one of revoking access rights to an object. Alan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
