# git rev-parse -q --verify 1609d7604b847a9820e63393d1a3b6cac7286d40^{commit}
1609d7604b847a9820e63393d1a3b6cac7286d40
already have revision, skipping fetch
# git checkout -q -f -B kisskb 1609d7604b847a9820e63393d1a3b6cac7286d40
# git clean -qxdf
# < git log -1
# commit 1609d7604b847a9820e63393d1a3b6cac7286d40
# Merge: 1f9c632cde0c a9c20bb0206a
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sat Sep 14 16:07:40 2019 -0700
# 
#     Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
#     
#     Pull kvm fixes from Paolo Bonzini:
#      "The main change here is a revert of reverts. We recently simplified
#       some code that was thought unnecessary; however, since then KVM has
#       grown quite a few cond_resched()s and for that reason the simplified
#       code is prone to livelocks---one CPUs tries to empty a list of guest
#       page tables while the others keep adding to them. This adds back the
#       generation-based zapping of guest page tables, which was not
#       unnecessary after all.
#     
#       On top of this, there is a fix for a kernel memory leak and a couple
#       of s390 fixlets as well"
#     
#     * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
#       KVM: x86/mmu: Reintroduce fast invalidate/zap for flushing memslot
#       KVM: x86: work around leak of uninitialized stack contents
#       KVM: nVMX: handle page fault in vmread
#       KVM: s390: Do not leak kernel stack data in the KVM_S390_INTERRUPT ioctl
#       KVM: s390: kvm_s390_vm_start_migration: check dirty_bitmap before using it as target for memset()
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-ld --version
# < git log --format=%s --max-count=1 1609d7604b847a9820e63393d1a3b6cac7286d40
# < make -s -j 80 ARCH=s390 O=/kisskb/build/linus_s390-allnoconfig_s390x CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-  allnoconfig
# make -s -j 80 ARCH=s390 O=/kisskb/build/linus_s390-allnoconfig_s390x CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-  
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:194:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
Completed OK
# rm -rf /kisskb/build/linus_s390-allnoconfig_s390x
# Build took: 0:00:16.220788