Btrfs progs release 4.2.1

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Hi,

here's a bugfix release of btrfs-progs.

* fix an off-by-one error in cross-stripe boundary check
  * if nodesize was 64k, any metadata block was reported as crossing, this leads
    to mkfs failure for example due to "no free blocks found"
  * for other nodesizes, if the end of the metadata block was 64k aligned, it
    was incorrectly reported by fsck

* convert:
  * don't write uninitialized data to image

* image:
  * don't loop with option -t0
  * don't create threads if compression is not requested

* other: minor cleanups

The pending patches in the mailinglist are scheduled for next minor
release.

Tarballs: https://www.kernel.org/pub/linux/kernel/people/kdave/btrfs-progs/
Git: git://git.kernel.org/pub/scm/linux/kernel/git/kdave/btrfs-progs.git


Shortlog:

Arnd Hannemann (1):
      btrfs-progs: makefile: drop u option from ar invocation

David Sterba (9):
      btrfs-progs: autogen: add check for pkg-config
      btrfs-progs: INSTALL: enhance build instructions
      btrfs-progs: tests: add crafted and fuzzed images
      btrfs-progs: fix cross stripe boundary check
      btrfs-progs: cleanup, make usage strings static
      btrfs-progs: cleanup, mark more functions static
      btrfs-progs: cleanup, update function definitions to be ANSI conformant
      btrfs-progs: docs: add option variants, defaults and versions to mount options
      Btrfs progs v4.2.1

Omar Sandoval (1):
      btrfs-progs: use calloc instead of malloc+memset for tree roots

Zhao Lei (7):
      btrfs-progs: fix typo in set/get of btrfs_inode_item::sequence
      btrfs-progs: Avoid uninitialized data in output of btrfs-convert
      btrfs-progs: close inode scan in copy_inodes
      btrfs-progs: image: fix infinite looping with -t 0
      btrfs-progs: image: don't create unused threads
      btrfs-progs: image: close all_devices at the end
      btrfs-progs: tests: Add '-o loop' to mount command line in convert-tests.sh

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