On Thu, Apr 23, 2020 at 07:52:15AM -0700, Minchan Kim wrote: > +SYSCALL_DEFINE6(process_madvise, int, which, pid_t, upid, > + const struct iovec __user *, vec, unsigned long, vlen, > + int, behavior, unsigned long, flags) > +{ Don't we now need a compat version of this that calls compat_import_iovec()?