[GIT PULL] ext4 bug fixes for 4.1-rc4

[Theodore Ts'o]

The following changes since commit 5ebe6afaf0057ac3eaeb98defd5456894b446d22:

  Linux 4.1-rc2 (2015-05-03 19:22:23 -0700)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git tags/for_linus_stable

for you to fetch changes up to b9576fc3624eb9fc88bec0d0ae883fd78be86239:

  ext4: fix an ext3 collapse range regression in xfstests (2015-05-15 00:24:10 -0400)

----------------------------------------------------------------
Fix a number of ext4 bugs; the most serious of which is a bug in the
lazytime mount optimization code where we could end up updating the
timestamps to the wrong inode.

----------------------------------------------------------------
Darrick J. Wong (1):
      jbd2: fix r_count overflows leading to buffer overflow in journal recovery

Eryu Guan (1):
      ext4: check for zero length extent explicitly

Lukas Czerner (1):
      ext4: fix NULL pointer dereference when journal restart fails

Theodore Ts'o (4):
      ext4: fix lazytime optimization
      ext4: don't save the error information if the block device is read-only
      ext4: remove unused function prototype from ext4.h
      ext4: fix an ext3 collapse range regression in xfstests

 fs/ext4/ext4.h        |  1 -
 fs/ext4/ext4_jbd2.c   |  6 ++++++
 fs/ext4/extents.c     | 10 +++++++++-
 fs/ext4/inode.c       |  2 +-
 fs/ext4/super.c       |  2 ++
 fs/jbd2/recovery.c    | 10 +++++++++-
 fs/jbd2/revoke.c      | 18 ++++++++++--------
 fs/jbd2/transaction.c | 25 ++++++++++++++++---------
 8 files changed, 53 insertions(+), 21 deletions(-)
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