On Wed, 23 Feb 2005, Benjamin Herrenschmidt wrote: > > Isn't Olof scheme racy ? Can't the stuff get swapped out between the > first get_user() and the "real" one ?
Yes. But see my suggested modification (which I still think is "the thing that Olof does", except it's more efficient and avoids the race). If rwsems acted like rwlocks, we wouldn't have this issue at all. Linus - 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/