Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull vfs updates from Al Viro:
 "This the bunch that sat in -next + lock_parent() fix.  This is the
  minimal set; there's more pending stuff.

  In particular, I really hope to get acct.c fixes merged this cycle -
  we need that to deal sanely with delayed-mntput stuff.  In the next
  pile, hopefully - that series is fairly short and localized
  (kernel/acct.c, fs/super.c and fs/namespace.c).  In this pile: more
  iov_iter work.  Most of prereqs for ->splice_write with sane locking
  order are there and Kent's dio rewrite would also fit nicely on top of
  this pile"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (70 commits)
  lock_parent: don't step on stale ->d_parent of all-but-freed one
  kill generic_file_splice_write()
  ceph: switch to iter_file_splice_write()
  shmem: switch to iter_file_splice_write()
  nfs: switch to iter_splice_write_file()
  fs/splice.c: remove unneeded exports
  ocfs2: switch to iter_file_splice_write()
  ->splice_write() via ->write_iter()
  bio_vec-backed iov_iter
  optimize copy_page_{to,from}_iter()
  bury generic_file_aio_{read,write}
  lustre: get rid of messing with iovecs
  ceph: switch to ->write_iter()
  ceph_sync_direct_write: stop poking into iov_iter guts
  ceph_sync_read: stop poking into iov_iter guts
  new helper: copy_page_from_iter()
  fuse: switch to ->write_iter()
  btrfs: switch to ->write_iter()
  ocfs2: switch to ->write_iter()
  xfs: switch to ->write_iter()
  ...

fs/ntfs/file.c

@@ -2090,10 +2090,7 @@ static ssize_t ntfs_file_aio_write_nolock(struct kiocb *iocb,
 	size_t count;		/* after file limit checks */
 	ssize_t written, err;
 
-	count = 0;
-	err = generic_segment_checks(iov, &nr_segs, &count, VERIFY_READ);
-	if (err)
-		return err;
+	count = iov_length(iov, nr_segs);
 	pos = *ppos;
 	/* We can write back this queue in page reclaim. */
 	current->backing_dev_info = mapping->backing_dev_info;
@@ -2202,8 +2199,8 @@ static int ntfs_file_fsync(struct file *filp, loff_t start, loff_t end,
 
 const struct file_operations ntfs_file_ops = {
 	.llseek		= generic_file_llseek,	 /* Seek inside file. */
-	.read		= do_sync_read,		 /* Read from file. */
-	.aio_read	= generic_file_aio_read, /* Async read from file. */
+	.read		= new_sync_read,	 /* Read from file. */
+	.read_iter	= generic_file_read_iter, /* Async read from file. */
 #ifdef NTFS_RW
 	.write		= do_sync_write,	 /* Write to file. */
 	.aio_write	= ntfs_file_aio_write,	 /* Async write to file. */