# git rev-parse -q --verify aa32f1169148beb90d71494e2f2a1999ba7b5366^{commit}
aa32f1169148beb90d71494e2f2a1999ba7b5366
already have revision, skipping fetch
# git checkout -q -f -B kisskb aa32f1169148beb90d71494e2f2a1999ba7b5366
# git clean -qxdf
# < git log -1
# commit aa32f1169148beb90d71494e2f2a1999ba7b5366
# Merge: d5bb349dbbe2 93f4e735b6d9
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sat Nov 30 10:33:14 2019 -0800
# 
#     Merge tag 'for-linus-hmm' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
#     
#     Pull hmm updates from Jason Gunthorpe:
#      "This is another round of bug fixing and cleanup. This time the focus
#       is on the driver pattern to use mmu notifiers to monitor a VA range.
#       This code is lifted out of many drivers and hmm_mirror directly into
#       the mmu_notifier core and written using the best ideas from all the
#       driver implementations.
#     
#       This removes many bugs from the drivers and has a very pleasing
#       diffstat. More drivers can still be converted, but that is for another
#       cycle.
#     
#        - A shared branch with RDMA reworking the RDMA ODP implementation
#     
#        - New mmu_interval_notifier API. This is focused on the use case of
#          monitoring a VA and simplifies the process for drivers
#     
#        - A common seq-count locking scheme built into the
#          mmu_interval_notifier API usable by drivers that call
#          get_user_pages() or hmm_range_fault() with the VA range
#     
#        - Conversion of mlx5 ODP, hfi1, radeon, nouveau, AMD GPU, and Xen
#          GntDev drivers to the new API. This deletes a lot of wonky driver
#          code.
#     
#        - Two improvements for hmm_range_fault(), from testing done by Ralph"
#     
#     * tag 'for-linus-hmm' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
#       mm/hmm: remove hmm_range_dma_map and hmm_range_dma_unmap
#       mm/hmm: make full use of walk_page_range()
#       xen/gntdev: use mmu_interval_notifier_insert
#       mm/hmm: remove hmm_mirror and related
#       drm/amdgpu: Use mmu_interval_notifier instead of hmm_mirror
#       drm/amdgpu: Use mmu_interval_insert instead of hmm_mirror
#       drm/amdgpu: Call find_vma under mmap_sem
#       nouveau: use mmu_interval_notifier instead of hmm_mirror
#       nouveau: use mmu_notifier directly for invalidate_range_start
#       drm/radeon: use mmu_interval_notifier_insert
#       RDMA/hfi1: Use mmu_interval_notifier_insert for user_exp_rcv
#       RDMA/odp: Use mmu_interval_notifier_insert()
#       mm/hmm: define the pre-processor related parts of hmm.h even if disabled
#       mm/hmm: allow hmm_range to be used with a mmu_interval_notifier or hmm_mirror
#       mm/mmu_notifier: add an interval tree notifier
#       mm/mmu_notifier: define the header pre-processor parts even if disabled
#       mm/hmm: allow snapshot of the special zero page
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-ld --version
# < git log --format=%s --max-count=1 aa32f1169148beb90d71494e2f2a1999ba7b5366
# < make -s -j 48 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  randconfig
KCONFIG_SEED=0x4865ACAC
# Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y
# yes \n | make -s -j 48 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 48 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  
/kisskb/src/kernel/bpf/btf.c:3466:1: error: empty enum is invalid
 };
 ^
make[3]: *** [/kisskb/src/scripts/Makefile.build:265: kernel/bpf/btf.o] Error 1
make[2]: *** [/kisskb/src/scripts/Makefile.build:509: kernel/bpf] Error 2
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/kisskb/src/Makefile:1652: kernel] Error 2
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:179: sub-make] Error 2
Command 'make -s -j 48 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8
# Build took: 0:03:04.307185