Merge branch 'work.misc-set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull misc user access cleanups from Al Viro:
 "The first pile is assorted getting rid of cargo-culted access_ok(),
  cargo-culted set_fs() and field-by-field copyouts.

  The same description applies to a lot of stuff in other branches -
  this is just the stuff that didn't fit into a more specific topical
  branch"

* 'work.misc-set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  Switch flock copyin/copyout primitives to copy_{from,to}_user()
  fs/fcntl: return -ESRCH in f_setown when pid/pgid can't be found
  fs/fcntl: f_setown, avoid undefined behaviour
  fs/fcntl: f_setown, allow returning error
  lpfc debugfs: get rid of pointless access_ok()
  adb: get rid of pointless access_ok()
  isdn: get rid of pointless access_ok()
  compat statfs: switch to copy_to_user()
  fs/locks: don't mess with the address limit in compat_fcntl64
  nfsd_readlink(): switch to vfs_get_link()
  drbd: ->sendpage() never needed set_fs()
  fs/locks: pass kernel struct flock to fcntl_getlk/setlk
  fs: locks: Fix some troubles at kernel-doc comments

drivers/isdn/i4l/isdn_ppp.c

@@ -795,9 +795,6 @@ isdn_ppp_read(int min, struct file *file, char __user *buf, int count)
 	if (!(is->state & IPPP_OPEN))
 		return 0;
 
-	if (!access_ok(VERIFY_WRITE, buf, count))
-		return -EFAULT;
-
 	spin_lock_irqsave(&is->buflock, flags);
 	b = is->first->next;
 	save_buf = b->buf;
@@ -2014,9 +2011,6 @@ isdn_ppp_dev_ioctl_stats(int slot, struct ifreq *ifr, struct net_device *dev)
 	struct ppp_stats t;
 	isdn_net_local *lp = netdev_priv(dev);
 
-	if (!access_ok(VERIFY_WRITE, res, sizeof(struct ppp_stats)))
-		return -EFAULT;
-
 	/* build a temporary stat struct and copy it to user space */
 
 	memset(&t, 0, sizeof(struct ppp_stats));