# git rev-parse -q --verify dad4f140edaa3f6bb452b6913d41af1ffd672e45^{commit}
dad4f140edaa3f6bb452b6913d41af1ffd672e45
already have revision, skipping fetch
# git checkout -q -f -B kisskb dad4f140edaa3f6bb452b6913d41af1ffd672e45
# git clean -qxdf
# < git log -1
# commit dad4f140edaa3f6bb452b6913d41af1ffd672e45
# Merge: 69d5b97c5973 3a08cd52c37c
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sun Oct 28 11:35:40 2018 -0700
# 
#     Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax
#     
#     Pull XArray conversion from Matthew Wilcox:
#      "The XArray provides an improved interface to the radix tree data
#       structure, providing locking as part of the API, specifying GFP flags
#       at allocation time, eliminating preloading, less re-walking the tree,
#       more efficient iterations and not exposing RCU-protected pointers to
#       its users.
#     
#       This patch set
#     
#        1. Introduces the XArray implementation
#     
#        2. Converts the pagecache to use it
#     
#        3. Converts memremap to use it
#     
#       The page cache is the most complex and important user of the radix
#       tree, so converting it was most important. Converting the memremap
#       code removes the only other user of the multiorder code, which allows
#       us to remove the radix tree code that supported it.
#     
#       I have 40+ followup patches to convert many other users of the radix
#       tree over to the XArray, but I'd like to get this part in first. The
#       other conversions haven't been in linux-next and aren't suitable for
#       applying yet, but you can see them in the xarray-conv branch if you're
#       interested"
#     
#     * 'xarray' of git://git.infradead.org/users/willy/linux-dax: (90 commits)
#       radix tree: Remove multiorder support
#       radix tree test: Convert multiorder tests to XArray
#       radix tree tests: Convert item_delete_rcu to XArray
#       radix tree tests: Convert item_kill_tree to XArray
#       radix tree tests: Move item_insert_order
#       radix tree test suite: Remove multiorder benchmarking
#       radix tree test suite: Remove __item_insert
#       memremap: Convert to XArray
#       xarray: Add range store functionality
#       xarray: Move multiorder_check to in-kernel tests
#       xarray: Move multiorder_shrink to kernel tests
#       xarray: Move multiorder account test in-kernel
#       radix tree test suite: Convert iteration test to XArray
#       radix tree test suite: Convert tag_tagged_items to XArray
#       radix tree: Remove radix_tree_clear_tags
#       radix tree: Remove radix_tree_maybe_preload_order
#       radix tree: Remove split/join code
#       radix tree: Remove radix_tree_update_node_t
#       page cache: Finish XArray conversion
#       dax: Convert page fault handlers to XArray
#       ...
# < /opt/cross/kisskb/or1k-linux-5.4.0-20170218/or1k-linux/bin/or1k-linux-gcc --version
# < git log --format=%s --max-count=1 dad4f140edaa3f6bb452b6913d41af1ffd672e45
# < make -s -j 10 ARCH=openrisc O=/kisskb/build/linus_or1ksim_defconfig_or32 CROSS_COMPILE=/opt/cross/kisskb/or1k-linux-5.4.0-20170218/or1k-linux/bin/or1k-linux-  or1ksim_defconfig
# make -s -j 10 ARCH=openrisc O=/kisskb/build/linus_or1ksim_defconfig_or32 CROSS_COMPILE=/opt/cross/kisskb/or1k-linux-5.4.0-20170218/or1k-linux/bin/or1k-linux-  
Completed OK
# rm -rf /kisskb/build/linus_or1ksim_defconfig_or32
# Build took: 0:00:48.256503