Make some comments slightly more comprehensible.
return -EFAULT;
/* argbuf.pgt_update_arr had better be direct mapped... */
+ /* Actually, we only *really* need to make sure that all of it's
+ pages are in memory and aren't going to get swapped out in the
+ mean time, but this is slightly easier than checking all of
+ that and is sufficient for the current userspace tools. */
entry = find_direct(¤t->mm->context.direct_list,
argbuf.pgt_update_arr);
if (entry == ¤t->mm->context.direct_list)