[git pull] gadgetfs fixes

[Al Viro <viro@ZenIV.linux.org.uk>]

	Assorted fixes around AIO on gadgetfs: leaks, use-after-free,
troubles caused by ->f_op flipping.  Please, pull from
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git gadget

Shortlog:
Al Viro (8):
      new helper: dup_iter()
      move iov_iter.c from mm/ to lib/
      gadget/function/f_fs.c: close leaks
      gadget/function/f_fs.c: use put iov_iter into io_data
      gadget/function/f_fs.c: switch to ->{read,write}_iter()
      gadgetfs: use-after-free in ->aio_read()
      gadget: switch ep_io_operations to ->read_iter/->write_iter
      gadgetfs: get rid of flipping ->f_op in ep_config()

Alan Stern (1):
      gadgetfs: really get rid of switching ->f_op

Diffstat:
 drivers/usb/gadget/function/f_fs.c | 204 +++++++---------
 drivers/usb/gadget/legacy/inode.c  | 466 +++++++++++++++----------------------
 include/linux/uio.h                |   2 +
 lib/Makefile                       |   2 +-
 {mm => lib}/iov_iter.c             |  15 ++
 mm/Makefile                        |   2 +-
 6 files changed, 291 insertions(+), 400 deletions(-)
 rename {mm => lib}/iov_iter.c (97%)