On Mon, 16 Nov 2015, Dave Hansen wrote: > During a page fault, we look up the VMA to ensure that the fault > is in a region with a valid mapping. But, in the top-level page > fault code we don't need the VMA for much else. Once we have > decided that an access is bad, we are going to send a signal no > matter what and do not need the VMA any more. So we do not pass > it down in to the signal generation code. > > But, for protection keys, we need the VMA. It tells us *which* > protection key we violated if we get a PF_PK. So, we need to > pass the VMA down and fill in siginfo->si_pkey. > > Signed-off-by: Dave Hansen <[email protected]>
Reviewed-by: Thomas Gleixner <[email protected]> -- 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/
