> > I wonder if there's some way you can cache the last caller and reload > > the key lazily (only when it changes). > > yes something that allows crypto drivers to detect if the key has > changed would be good.
It seems trivial to keep the last key you were given and do a quick memcmp in your setkey method to see if it's different from the last key you pushed to hardware, and set a flag if it is. Then only do your set_key() if you have a new key to pass to hardware. I'm assuming the expense is in the aes_write() calls, and you could avoid them if you know you're not writing something new. - R. - 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/
