# git rev-parse -q --verify 9f159ae07f07fc540290f21937231034f554bdd7^{commit}
9f159ae07f07fc540290f21937231034f554bdd7
already have revision, skipping fetch
# git checkout -q -f -B kisskb 9f159ae07f07fc540290f21937231034f554bdd7
# git clean -qxdf
# < git log -1
# commit 9f159ae07f07fc540290f21937231034f554bdd7
# Merge: 5fb181cba010 7af0145067bc
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sun Sep 1 11:21:57 2019 -0700
# 
#     Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
#     
#     Pull x86 fixes from Thomas Gleixner:
#      "A set of fixes for x86:
#     
#        - Fix the bogus detection of 32bit user mode for uretprobes which
#          caused corruption of the user return address resulting in
#          application crashes. In the uprobes handler in_ia32_syscall() is
#          obviously always returning false on a 64bit kernel. Use
#          user_64bit_mode() instead which works correctly.
#     
#        - Prevent large page splitting when ftrace flips RW/RO on the kernel
#          text which caused iTLB performance issues. Ftrace wants to be
#          converted to text_poke() which avoids the problem, but for now
#          allow large page preservation in the static protections check when
#          the change request spawns a full large page.
#     
#        - Prevent arch_dynirq_lower_bound() from returning 0 when the IOAPIC
#          is configured via device tree. In the device tree case the GSI 1:1
#          mapping is meaningless therefore the lower bound which protects the
#          GSI range on ACPI machines is irrelevant. Return the lower bound
#          which the core hands to the function instead of blindly returning 0
#          which causes the core to allocate the invalid virtual interupt
#          number 0 which in turn prevents all drivers from allocating and
#          requesting an interrupt.
#     
#        - Remove the bogus initialization of LDR and DFR in the 32bit bigsmp
#          APIC driver. That uses physical destination mode where LDR/DFR are
#          ignored, but the initialization and the missing clear of LDR caused
#          the APIC to be left in a inconsistent state on kexec/reboot.
#     
#        - Clear LDR when clearing the APIC registers so the APIC is in a well
#          defined state.
#     
#        - Initialize variables proper in the find_trampoline_placement()
#          code.
#     
#        - Silence GCC( build warning for the real mode part of the build"
#     
#     * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
#       x86/mm/cpa: Prevent large page split when ftrace flips RW on kernel text
#       x86/build: Add -Wnoaddress-of-packed-member to REALMODE_CFLAGS, to silence GCC9 build warning
#       x86/boot/compressed/64: Fix missing initialization in find_trampoline_placement()
#       x86/apic: Include the LDR when clearing out APIC registers
#       x86/apic: Do not initialize LDR and DFR for bigsmp
#       uprobes/x86: Fix detection of 32-bit user mode
#       x86/apic: Fix arch_dynirq_lower_bound() bug for DT enabled machines
# < /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 9f159ae07f07fc540290f21937231034f554bdd7
# < make -s -j 48 ARCH=s390 O=/kisskb/build/linus_s390-defconfig_s390x CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-  defconfig
# make -s -j 48 ARCH=s390 O=/kisskb/build/linus_s390-defconfig_s390x CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-  
cc1: error: unrecognized command line option '-mtune=zEC12'cc1: error: unrecognized command line option '-mtune=zEC12'

make[2]: *** [/kisskb/src/scripts/Makefile.build:114: scripts/mod/devicetable-offsets.s] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: *** [/kisskb/src/scripts/Makefile.build:281: scripts/mod/empty.o] Error 1
make[1]: *** [/kisskb/src/Makefile:1126: prepare0] Error 2
make: *** [Makefile:179: sub-make] Error 2
Command 'make -s -j 48 ARCH=s390 O=/kisskb/build/linus_s390-defconfig_s390x CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus_s390-defconfig_s390x
# Build took: 0:00:02.934040