# git rev-parse -q --verify 555ec1553b73a97562e5a4867c49535679d2e387^{commit}
555ec1553b73a97562e5a4867c49535679d2e387
already have revision, skipping fetch
# git checkout -q -f -B kisskb 555ec1553b73a97562e5a4867c49535679d2e387
# git clean -qxdf
# git log -1
commit 555ec1553b73a97562e5a4867c49535679d2e387
Author: Nicholas Piggin <npiggin@gmail.com>
Date:   Tue Aug 1 23:59:28 2017 +1000

    powerpc/64: Fix __check_irq_replay missing decrementer interrupt
    
    If the decrementer wraps again and de-asserts the decrementer
    exception while hard-disabled, __check_irq_replay() has a test to
    notice the wrap when interrupts are re-enabled.
    
    The decrementer check must be done when clearing the PACA_IRQ_HARD_DIS
    flag, not when the PACA_IRQ_DEC flag is tested. Previously this worked
    because the decrementer interrupt was always the first one checked
    after clearing the hard disable flag, but HMI check was moved ahead of
    that, which introduced this bug.
    
    This can cause a missed decrementer interrupt if we soft-disable
    interrupts then take an HMI which is recorded in irq_happened, then
    hard-disable interrupts for > 4s to wrap the decrementer.
    
    Fixes: e0e0d6b7390b ("powerpc/64: Replay hypervisor maintenance interrupt first")
    Cc: stable@vger.kernel.org # v4.9+
    Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
    Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version
# < git log --format=%s --max-count=1 555ec1553b73a97562e5a4867c49535679d2e387
# < make -j 10 ARCH=powerpc O=/home/kisskb/slave/build/powerpc-fixes_powerpc-randconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  randconfig
KCONFIG_SEED=0x61DB6332
# Added to kconfig CONFIG_STANDALONE=y
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_MODULE_SIG=n
# Added to kconfig CONFIG_CPU_BIG_ENDIAN=y
# Added to kconfig CONFIG_PPC64=y
# Added to kconfig CONFIG_PPC_DISABLE_WERROR=y
# Added to kconfig CONFIG_SECTION_MISMATCH_WARN_ONLY=y
# Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y
# Added to kconfig CONFIG_CC_STACKPROTECTOR_STRONG=n
# Added to kconfig CONFIG_GCC_PLUGINS=n
# Added to kconfig CONFIG_LD_HEAD_STUB_CATCH=y
# Added to kconfig 
# yes \n | make -j 10 ARCH=powerpc O=/home/kisskb/slave/build/powerpc-fixes_powerpc-randconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  oldconfig
yes: standard output: Broken pipe
yes: write error
# make -j 10 ARCH=powerpc O=/home/kisskb/slave/build/powerpc-fixes_powerpc-randconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  
make[1]: Entering directory '/home/kisskb/slave/build/powerpc-fixes_powerpc-randconfig_powerpc'
  GEN     ./Makefile
scripts/kconfig/conf  --silentoldconfig Kconfig
  CHK     include/config/kernel.release
  GEN     ./Makefile
  WRAP    arch/powerpc/include/generated/uapi/asm/param.h
  WRAP    arch/powerpc/include/generated/uapi/asm/poll.h
  WRAP    arch/powerpc/include/generated/uapi/asm/resource.h
  WRAP    arch/powerpc/include/generated/uapi/asm/sockios.h
  WRAP    arch/powerpc/include/generated/uapi/asm/statfs.h
  CHK     include/generated/uapi/linux/version.h
  UPD     include/generated/uapi/linux/version.h
  UPD     include/config/kernel.release
  HOSTCC  scripts/basic/bin2c
  Using /home/kisskb/slave/src as source for kernel
  WRAP    arch/powerpc/include/generated/asm/clkdev.h
  WRAP    arch/powerpc/include/generated/asm/div64.h
  WRAP    arch/powerpc/include/generated/asm/export.h
  WRAP    arch/powerpc/include/generated/asm/irq_regs.h
  WRAP    arch/powerpc/include/generated/asm/irq_work.h
  WRAP    arch/powerpc/include/generated/asm/local64.h
  WRAP    arch/powerpc/include/generated/asm/mcs_spinlock.h
  WRAP    arch/powerpc/include/generated/asm/preempt.h
  WRAP    arch/powerpc/include/generated/asm/rwsem.h
  WRAP    arch/powerpc/include/generated/asm/vtime.h
  CHK     include/generated/utsrelease.h
  UPD     include/generated/utsrelease.h
  HOSTCC  scripts/dtc/dtc.o
  CC      scripts/mod/empty.o
  HOSTCC  scripts/mod/mk_elfconfig
  CC      scripts/mod/devicetable-offsets.s
  HOSTCC  scripts/kallsyms
  HOSTCC  scripts/pnmtologo
  HOSTCC  scripts/conmakehash
  HOSTCC  scripts/sortextable
  HOSTCC  scripts/dtc/flattree.o
  HOSTCC  scripts/dtc/fstree.o
  HOSTCC  scripts/dtc/data.o
  CHK     scripts/mod/devicetable-offsets.h
  UPD     scripts/mod/devicetable-offsets.h
  MKELF   scripts/mod/elfconfig.h
  HOSTCC  scripts/mod/modpost.o
  HOSTCC  scripts/mod/file2alias.o
  HOSTCC  scripts/dtc/livetree.o
  HOSTCC  scripts/dtc/treesource.o
  HOSTCC  scripts/dtc/srcpos.o
  HOSTCC  scripts/mod/sumversion.o
  HOSTCC  scripts/dtc/checks.o
  HOSTCC  scripts/dtc/util.o
  SHIPPED scripts/dtc/dtc-lexer.lex.c
  SHIPPED scripts/dtc/dtc-parser.tab.h
  SHIPPED scripts/dtc/dtc-parser.tab.c
  HOSTCC  scripts/dtc/dtc-lexer.lex.o
  HOSTCC  scripts/dtc/dtc-parser.tab.o
  CHK     include/generated/timeconst.h
  CC      kernel/bounds.s
  UPD     include/generated/timeconst.h
  CHK     include/generated/bounds.h
  UPD     include/generated/bounds.h
  CC      arch/powerpc/kernel/asm-offsets.s
  HOSTLD  scripts/dtc/dtc
  CHK     include/generated/asm-offsets.h
  UPD     include/generated/asm-offsets.h
  CALL    /home/kisskb/slave/src/scripts/checksyscalls.sh
  HOSTLD  scripts/mod/modpost
  CC      init/main.o
  CHK     include/generated/compile.h
  AR      usr/built-in.o
  CC      init/do_mounts.o
  CC      init/noinitramfs.o
  CC      init/init_task.o
  UPD     include/generated/compile.h
  CC      init/version.o
  CC      arch/powerpc/mm/fault.o
  AS      arch/powerpc/lib/string.o
  CC      arch/powerpc/sysdev/mpic.o
  CC      arch/powerpc/platforms/85xx/smp.o
  CC      arch/powerpc/kernel/cputable.o
  CC      arch/powerpc/lib/alloc.o
  CC      arch/powerpc/kernel/ptrace.o
  CC      arch/powerpc/mm/mem.o
  CC      arch/powerpc/lib/code-patching.o
  CC      arch/powerpc/lib/feature-fixups.o
  AS      arch/powerpc/lib/checksum_64.o
  AR      arch/powerpc/math-emu/built-in.o
  CC      arch/powerpc/mm/pgtable.o
  AS      arch/powerpc/crypto/md5-asm.o
  CC      arch/powerpc/platforms/85xx/common.o
  CC      arch/powerpc/crypto/md5-glue.o
  AS [M]  arch/powerpc/crypto/sha1-powerpc-asm.o
  CC      arch/powerpc/mm/mmap.o
  CC      arch/powerpc/lib/checksum_wrappers.o
  AS      arch/powerpc/lib/copypage_64.o
  AR      arch/powerpc/platforms/85xx/built-in.o
  AR      arch/powerpc/platforms/built-in.o
  CC      arch/powerpc/mm/init_64.o
  CC      arch/powerpc/sysdev/mpic_msi.o
  CC      arch/powerpc/sysdev/mpic_u3msi.o
  AR      init/mounts.o
  AR      init/built-in.o
  CC      arch/powerpc/mm/pgtable_64.o
  CC      arch/powerpc/kernel/syscalls.o
  CC [M]  arch/powerpc/crypto/sha1.o
  AS      arch/powerpc/lib/copyuser_64.o
  AS      arch/powerpc/lib/mem_64.o
  CC      arch/powerpc/kernel/irq.o
  CC      arch/powerpc/kernel/align.o
  AS      arch/powerpc/lib/hweight_64.o
  AS      arch/powerpc/lib/copyuser_power7.o
  AS      arch/powerpc/lib/string_64.o
  AS      arch/powerpc/lib/copypage_power7.o
  AS      arch/powerpc/lib/memcpy_power7.o
/home/kisskb/slave/src/arch/powerpc/mm/pgtable_64.c: In function '__alloc_for_cache':
/home/kisskb/slave/src/arch/powerpc/mm/pgtable_64.c:358:10: error: 'PGALLOC_GFP' undeclared (first use in this function)
/home/kisskb/slave/src/arch/powerpc/mm/pgtable_64.c:358:10: note: each undeclared identifier is reported only once for each function it appears in
  CC      arch/powerpc/kernel/signal_32.o
/home/kisskb/slave/src/scripts/Makefile.build:302: recipe for target 'arch/powerpc/mm/pgtable_64.o' failed
make[2]: *** [arch/powerpc/mm/pgtable_64.o] Error 1
make[2]: *** Waiting for unfinished jobs....
  CC      arch/powerpc/kernel/pmc.o
  AS      arch/powerpc/lib/memcpy_64.o
/home/kisskb/slave/src/Makefile:1019: recipe for target 'arch/powerpc/mm' failed
make[1]: *** [arch/powerpc/mm] Error 2
make[1]: *** Waiting for unfinished jobs....
  AS      arch/powerpc/lib/memcmp_64.o
  AR      arch/powerpc/crypto/md5-ppc.o
  CC      arch/powerpc/lib/locks.o
  CC      arch/powerpc/sysdev/msi_bitmap.o
  CC      arch/powerpc/kernel/vdso.o
  AS      arch/powerpc/lib/crtsavres.o
  AR      arch/powerpc/crypto/built-in.o
  CC      arch/powerpc/sysdev/fsl_soc.o
  CC      arch/powerpc/sysdev/fsl_mpic_err.o
  CC      arch/powerpc/kernel/process.o
  AR      arch/powerpc/lib/built-in.o
  CPP     arch/powerpc/kernel/systbl_chk.i
  CC      arch/powerpc/sysdev/fsl_pci.o
  LD [M]  arch/powerpc/crypto/sha1-powerpc.o
  CC      arch/powerpc/sysdev/fsl_msi.o
  CC      arch/powerpc/sysdev/indirect_pci.o
  CC      arch/powerpc/kernel/idle.o
  CC      arch/powerpc/kernel/signal.o
  CC      arch/powerpc/kernel/sysfs.o
  CC      arch/powerpc/kernel/cacheinfo.o
  CC      arch/powerpc/kernel/time.o
  CC      arch/powerpc/kernel/prom.o
  CC      arch/powerpc/kernel/traps.o
  CC      arch/powerpc/kernel/setup-common.o
  CC      arch/powerpc/kernel/udbg.o
  AS      arch/powerpc/kernel/misc.o
  CC      arch/powerpc/kernel/io.o
  CC      arch/powerpc/kernel/dma.o
  AR      arch/powerpc/sysdev/built-in.o
  AS      arch/powerpc/kernel/misc_64.o
  CC      arch/powerpc/kernel/of_platform.o
  CC      arch/powerpc/kernel/prom_parse.o
  CC      arch/powerpc/kernel/setup_64.o
  CC      arch/powerpc/kernel/sys_ppc32.o
  CC      arch/powerpc/kernel/signal_64.o
  CC      arch/powerpc/kernel/ptrace32.o
  CC      arch/powerpc/kernel/paca.o
  CC      arch/powerpc/kernel/nvram_64.o
  CC      arch/powerpc/kernel/firmware.o
  CC      arch/powerpc/kernel/trace/ftrace.o
  CC      arch/powerpc/kernel/trace/trace_clock.o
  AS      arch/powerpc/kernel/trace/ftrace_64.o
  AS      arch/powerpc/kernel/trace/ftrace_64_pg.o
  AS      arch/powerpc/kernel/exceptions-64e.o
  LDS     arch/powerpc/kernel/vdso32/vdso32.lds
  LDS     arch/powerpc/kernel/vdso64/vdso64.lds
  VDSO32A arch/powerpc/kernel/vdso32/sigtramp.o
  AS      arch/powerpc/kernel/vdso64/sigtramp.o
  AS      arch/powerpc/kernel/vdso64/gettimeofday.o
  VDSO32A arch/powerpc/kernel/vdso32/gettimeofday.o
  VDSO32A arch/powerpc/kernel/vdso32/datapage.o
  AS      arch/powerpc/kernel/vdso64/datapage.o
  VDSO32A arch/powerpc/kernel/vdso32/cacheflush.o
  VDSO32A arch/powerpc/kernel/vdso32/note.o
  AS      arch/powerpc/kernel/vdso64/cacheflush.o
  AS      arch/powerpc/kernel/idle_book3e.o
  CC      arch/powerpc/kernel/proc_powerpc.o
  VDSO32A arch/powerpc/kernel/vdso32/getcpu.o
  CC      arch/powerpc/kernel/crash_dump.o
  AS      arch/powerpc/kernel/vdso64/note.o
  CC      arch/powerpc/kernel/module.o
  CC      arch/powerpc/kernel/module_64.o
  CC      arch/powerpc/kernel/dbell.o
  AS      arch/powerpc/kernel/vdso64/getcpu.o
  VDSO32L arch/powerpc/kernel/vdso32/vdso32.so.dbg
  AS      arch/powerpc/kernel/reloc_64.o
  OBJCOPY arch/powerpc/kernel/vdso32/vdso32.so
  AS      arch/powerpc/kernel/vdso32/vdso32_wrapper.o
  VDSO64L arch/powerpc/kernel/vdso64/vdso64.so.dbg
  CC      arch/powerpc/kernel/dma-iommu.o
  OBJCOPY arch/powerpc/kernel/vdso64/vdso64.so
  AR      arch/powerpc/kernel/vdso32/built-in.o
  AS      arch/powerpc/kernel/vdso64/vdso64_wrapper.o
  CC      arch/powerpc/kernel/iommu.o
  AR      arch/powerpc/kernel/vdso64/built-in.o
  CC      arch/powerpc/kernel/kgdb.o
  AR      arch/powerpc/kernel/trace/built-in.o
  CC      arch/powerpc/kernel/smp.o
  CC      arch/powerpc/kernel/legacy_serial.o
  CC      arch/powerpc/kernel/udbg_16550.o
  CC      arch/powerpc/kernel/stacktrace.o
  CC      arch/powerpc/kernel/pci_64.o
  CC      arch/powerpc/kernel/pci_dn.o
  CC      arch/powerpc/kernel/pci-hotplug.o
  CC      arch/powerpc/kernel/isa-bridge.o
  CC      arch/powerpc/kernel/pci-common.o
  CC      arch/powerpc/kernel/pci_of_scan.o
  CC      arch/powerpc/kernel/msi.o
  CC      arch/powerpc/kernel/iomap.o
  CC      arch/powerpc/kernel/epapr_paravirt.o
  AS      arch/powerpc/kernel/epapr_hcalls.o
  AS      arch/powerpc/kernel/head_64.o
  LDS     arch/powerpc/kernel/vmlinux.lds
  AS      arch/powerpc/kernel/fpu.o
  AS      arch/powerpc/kernel/entry_64.o
  CALL    /home/kisskb/slave/src/arch/powerpc/kernel/systbl_chk.sh
  AS      arch/powerpc/kernel/systbl.o
  AR      arch/powerpc/kernel/built-in.o
make[1]: Leaving directory '/home/kisskb/slave/build/powerpc-fixes_powerpc-randconfig_powerpc'
Makefile:145: recipe for target 'sub-make' failed
make: *** [sub-make] Error 2
Command 'make -j 10 ARCH=powerpc O=/home/kisskb/slave/build/powerpc-fixes_powerpc-randconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  ' returned non-zero exit status 2
# rm -rf /home/kisskb/slave/build/powerpc-fixes_powerpc-randconfig_powerpc
# Build took: 0:00:13.341767