Pull ext4 updates from Ted Ts'o:
 "A lot of cleanups and bug fixes, especially dealing with corrupted
  file systems"

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (23 commits)
  ext4: fix fencepost error in check for inode count overflow during resize
  ext4: correctly handle a zero-length xattr with a non-zero e_value_offs
  ext4: bubble errors from ext4_find_inline_data_nolock() up to ext4_iget()
  ext4: do not allow external inodes for inline data
  ext4: report delalloc reserve as non-free in statfs for project quota
  ext4: remove NULL check before calling kmem_cache_destroy()
  jbd2: remove NULL check before calling kmem_cache_destroy()
  jbd2: remove bunch of empty lines with jbd2 debug
  ext4: handle errors on ext4_commit_super
  ext4: do not update s_last_mounted of a frozen fs
  ext4: factor out helper ext4_sample_last_mounted()
  vfs: add the sb_start_intwrite_trylock() helper
  ext4: update mtime in ext4_punch_hole even if no blocks are released
  ext4: add verifier check for symlink with append/immutable flags
  fs: ext4: add new return type vm_fault_t
  ext4: fix hole length detection in ext4_ind_map_blocks()
  ext4: mark block bitmap corrupted when found
  ext4: mark inode bitmap corrupted when found
  ext4: add new ext4_mark_group_bitmap_corrupted() helper
  ext4: fix wrong return value in ext4_read_inode_bitmap()
  ...