# git rev-parse -q --verify 972a278fe60c361eb8f37619f562f092e8786d7c^{commit}
972a278fe60c361eb8f37619f562f092e8786d7c
already have revision, skipping fetch
# git checkout -q -f -B kisskb 972a278fe60c361eb8f37619f562f092e8786d7c
# git clean -qxdf
# < git log -1
# commit 972a278fe60c361eb8f37619f562f092e8786d7c
# Merge: c5fe7a97f20c 088aea3b97e0
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sat Jul 16 13:48:55 2022 -0700
# 
#     Merge tag 'for-5.19-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
#     
#     Pull btrfs reverts from David Sterba:
#      "Due to a recent report [1] we need to revert the radix tree to xarray
#       conversion patches.
#     
#       There's a problem with sleeping under spinlock, when xa_insert could
#       allocate memory under pressure. We use GFP_NOFS so this is a real
#       problem that we unfortunately did not discover during review.
#     
#       I'm sorry to do such change at rc6 time but the revert is IMO the
#       safer option, there are patches to use mutex instead of the spin locks
#       but that would need more testing. The revert branch has been tested on
#       a few setups, all seem ok.
#     
#       The conversion to xarray will be revisited in the future"
#     
#     Link: https://lore.kernel.org/linux-btrfs/cover.1657097693.git.fdmanana@suse.com/ [1]
#     
#     * tag 'for-5.19-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
#       Revert "btrfs: turn delayed_nodes_tree into an XArray"
#       Revert "btrfs: turn name_cache radix tree into XArray in send_ctx"
#       Revert "btrfs: turn fs_info member buffer_radix into XArray"
#       Revert "btrfs: turn fs_roots_radix in btrfs_fs_info into an XArray"
# < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 972a278fe60c361eb8f37619f562f092e8786d7c
# < make -s -j 32 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 defconfig
# < make -s -j 32 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 help
# make -s -j 32 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 olddefconfig
# make -s -j 32 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 
arch/x86/um/../kernel/module.o: In function `module_finalize':
module.c:(.text+0x434): undefined reference to `apply_returns'
collect2: error: ld returned 1 exit status
make[1]: *** [/kisskb/src/Makefile:1164: vmlinux] Error 1
make: *** [Makefile:219: __sub-make] Error 2
Command 'make -s -j 32 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus_um-defconfig_um-x86_64
# Build took: 0:00:27.248058