ext4: Bug fixes for EXT4_IOC_MOVE_EXT ioctl

Hi,

This patch series is related to EXT4_IOC_MOVE_EXT ioctl. The first one is a patch I sent before but not be included in the ext4 patch queue yet, so I resend it.

1/4 [RESEND] Fix block count in EXT4_IOC_MOVE_EXT failure 2/4 Fix lock order problem in ext4_move_extents()
3/4 Fix possible recursive locking warning in EXT4_IOC_MOVE_EXT 4/4 Fix comment typo in move_extents.c

These patches are applies to 2.6.31-git17 with the latest ext4 patch queue (4504d7f7fff06501c517a3e2eb87a1381ecbc539).

Regards,
Akira Fujita