[GIT PULL] XArray for 4.20-rc7

[Matthew Wilcox]

(hope I did the git tag correctly this time)

The following changes since commit cf76c364a1e1e5224af80edf70a1e3023e1fcf8c:

  Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi (2018-12-05 17:06:31 -0800)

are available in the Git repository at:

  git://git.infradead.org/users/willy/linux-dax.git tags/xarray-4.20-rc7

for you to fetch changes up to 48483614de97c4f5219abeda630e62b2bebdce62:

  XArray: Fix xa_alloc when id exceeds max (2018-12-13 14:07:33 -0500)

----------------------------------------------------------------
XArray updates for 4.20-rc7

Two bugfixes, each with test-suite updates, two improvements to the
test-suite without associated bugs, and one patch adding a missing API.

----------------------------------------------------------------
Matthew Wilcox (5):
      radix tree: Don't return retry entries from lookup
      XArray: Add xa_cmpxchg_irq and xa_cmpxchg_bh
      XArray tests: Handle larger indices more elegantly
      XArray tests: Check iterating over multiorder entries
      XArray: Fix xa_alloc when id exceeds max

 Documentation/core-api/xarray.rst      |   5 +-
 include/linux/xarray.h                 |  54 ++++++++++++
 lib/radix-tree.c                       |   4 +-
 lib/test_xarray.c                      | 155 ++++++++++++++++++++++++---------
 lib/xarray.c                           |   8 +-
 mm/shmem.c                             |   4 +-
 tools/testing/radix-tree/Makefile      |   1 +
 tools/testing/radix-tree/main.c        |   1 +
 tools/testing/radix-tree/regression.h  |   1 +
 tools/testing/radix-tree/regression4.c |  79 +++++++++++++++++
 10 files changed, 258 insertions(+), 54 deletions(-)
 create mode 100644 tools/testing/radix-tree/regression4.c