Let ubiformat umount / detach users

[Sascha Hauer]

This is a rebase of the series Markus sent earlier on the recent
ubiformat changes.

Sascha

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Markus Pargmann (3):
      fs: umount based on device path and mount path
      fs: Add for_each_fs_device_safe()
      ubiformat: Cleanly umount and detach the ubi before formating

Sascha Hauer (5):
      mtd: ubi: rename cdev.c to barebox.c
      mtd: ubi: make ubi_detach_mtd_dev ubi internal
      mtd: ubi: umount mounted volumes before detaching a ubi device
      mtd: ubi: Add function to get ubi number from mtd device
      commands: ubidetach: Allow mtd devices as argument

 commands/ubi.c                        | 30 +++++++++++++++---
 commands/ubiformat.c                  | 24 +++++++++++++--
 commands/umount.c                     |  2 +-
 drivers/mtd/ubi/Makefile              |  2 +-
 drivers/mtd/ubi/{cdev.c => barebox.c} | 57 +++++++++++++++++++++++++++++++++++
 drivers/mtd/ubi/ubi.h                 |  1 +
 fs/fs.c                               | 48 +++++++++++++++++++++++++++--
 include/fs.h                          |  2 ++
 include/mtd/ubi-user.h                |  3 +-
 9 files changed, 157 insertions(+), 12 deletions(-)
 rename drivers/mtd/ubi/{cdev.c => barebox.c} (83%)