# git rev-parse -q --verify 3bb61aa61828499a7d0f5e560051625fd02ae7e4^{commit}
3bb61aa61828499a7d0f5e560051625fd02ae7e4
already have revision, skipping fetch
# git checkout -q -f -B kisskb 3bb61aa61828499a7d0f5e560051625fd02ae7e4
# git clean -qxdf
# < git log -1
# commit 3bb61aa61828499a7d0f5e560051625fd02ae7e4
# Merge: 2c6ffa9e9b11 9e5344e0ffc3
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Wed Dec 2 12:27:37 2020 -0800
# 
#     Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
#     
#     Pull arm64 fixes from Will Deacon:
#      "I'm sad to say that we've got an unusually large arm64 fixes pull for
#       rc7 which addresses numerous significant instrumentation issues with
#       our entry code.
#     
#       Without these patches, lockdep is hopelessly unreliable in some
#       configurations [1,2] and syzkaller is therefore not a lot of use
#       because it's so noisy.
#     
#       Although much of this has always been broken, it appears to have been
#       exposed more readily by other changes such as 044d0d6de9f5 ("lockdep:
#       Only trace IRQ edges") and general lockdep improvements around IRQ
#       tracing and NMIs.
#     
#       Fixing this properly required moving much of the instrumentation hooks
#       from our entry assembly into C, which Mark has been working on for the
#       last few weeks. We're not quite ready to move to the recently added
#       generic functions yet, but the code here has been deliberately written
#       to mimic that closely so we can look at cleaning things up once we
#       have a bit more breathing room.
#     
#       Having said all that, the second version of these patches was posted
#       last week and I pushed it into our CI (kernelci and cki) along with a
#       commit which forced on PROVE_LOCKING, NOHZ_FULL and
#       CONTEXT_TRACKING_FORCE. The result? We found a real bug in the
#       md/raid10 code [3].
#     
#       Oh, and there's also a really silly typo patch that's unrelated.
#     
#       Summary:
#     
#        - Fix numerous issues with instrumentation and exception entry
#     
#        - Fix hideous typo in unused register field definition"
#     
#     [1] https://lore.kernel.org/r/CACT4Y+aAzoJ48Mh1wNYD17pJqyEcDnrxGfApir=-j171TnQXhw@mail.gmail.com
#     [2] https://lore.kernel.org/r/20201119193819.GA2601289@elver.google.com
#     [3] https://lore.kernel.org/r/94c76d5e-466a-bc5f-e6c2-a11b65c39f83@redhat.com
#     
#     * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
#       arm64: mte: Fix typo in macro definition
#       arm64: entry: fix EL1 debug transitions
#       arm64: entry: fix NMI {user, kernel}->kernel transitions
#       arm64: entry: fix non-NMI kernel<->kernel transitions
#       arm64: ptrace: prepare for EL1 irq/rcu tracking
#       arm64: entry: fix non-NMI user<->kernel transitions
#       arm64: entry: move el1 irq/nmi logic to C
#       arm64: entry: prepare ret_to_user for function call
#       arm64: entry: move enter_from_user_mode to entry-common.c
#       arm64: entry: mark entry code as noinstr
#       arm64: mark idle code as noinstr
#       arm64: syscall: exit userspace before unmasking exceptions
# < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-gcc --version
# < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-ld --version
# < git log --format=%s --max-count=1 3bb61aa61828499a7d0f5e560051625fd02ae7e4
# < make -s -j 8 ARCH=arm64 O=/kisskb/build/linus_arm64-allmodconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  allmodconfig
# < make -s -j 8 ARCH=arm64 O=/kisskb/build/linus_arm64-allmodconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  help
# make -s -j 8 ARCH=arm64 O=/kisskb/build/linus_arm64-allmodconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  olddefconfig
# make -s -j 8 ARCH=arm64 O=/kisskb/build/linus_arm64-allmodconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  
arch/arm64/Makefile:25: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum
arch/arm64/Makefile:37: LSE atomics not supported by binutils
/kisskb/src/samples/seccomp/user-trap.c: In function 'send_fd':
/kisskb/src/samples/seccomp/user-trap.c:50:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
  *((int *)CMSG_DATA(cmsg)) = fd;
  ^
/kisskb/src/samples/seccomp/user-trap.c: In function 'recv_fd':
/kisskb/src/samples/seccomp/user-trap.c:83:2: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
  return *((int *)CMSG_DATA(cmsg));
  ^
Completed OK
# rm -rf /kisskb/build/linus_arm64-allmodconfig_arm64-gcc5.4
# Build took: 0:37:50.401946