# git rev-parse -q --verify 36b35d5d807b7e57aff7d08e63de8b17731ee211^{commit}
36b35d5d807b7e57aff7d08e63de8b17731ee211
already have revision, skipping fetch
# git checkout -q -f -B kisskb 36b35d5d807b7e57aff7d08e63de8b17731ee211
# git clean -qxdf
# git log -1
commit 36b35d5d807b7e57aff7d08e63de8b17731ee211
Author: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Date:   Tue Sep 15 12:30:08 2015 +0530

    powerpc/mm: Recompute hash value after a failed update
    
    If we had secondary hash flag set, we ended up modifying hash value in
    the updatepp code path. Hence with a failed updatepp we will be using
    a wrong hash value for the following hash insert. Fix this by
    recomputing hash before insert.
    
    Without this patch we can end up with using wrong slot number in linux
    pte. That can result in us missing an hash pte update or invalidate
    which can cause memory corruption or even machine check.
    
    Fixes: 6d492ecc6489 ("powerpc/THP: Add code to handle HPTE faults for hugepages")
    Cc: stable@vger.kernel.org # v3.11+
    Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
    Reviewed-by: Paul Mackerras <paulus@samba.org>
    Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version
# < git log --format=%s --max-count=1 36b35d5d807b7e57aff7d08e63de8b17731ee211
# < make -j 48 ARCH=powerpc O=/home/kisskb/slave/build/mpe_powerpc-randconfig_powerpc CROSS_COMPILE=/opt/cross/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  randconfig
KCONFIG_SEED=0x237A947
# 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
# yes \n | make -j 48 ARCH=powerpc O=/home/kisskb/slave/build/mpe_powerpc-randconfig_powerpc CROSS_COMPILE=/opt/cross/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  oldconfig
yes: standard output: Broken pipe
yes: write error
# make -j 48 ARCH=powerpc O=/home/kisskb/slave/build/mpe_powerpc-randconfig_powerpc CROSS_COMPILE=/opt/cross/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  
make[1]: Entering directory '/home/kisskb/slave/build/mpe_powerpc-randconfig_powerpc'
  GEN     ./Makefile
scripts/kconfig/conf  --silentoldconfig Kconfig
  CHK     include/config/kernel.release
  GEN     ./Makefile
  WRAP    arch/powerpc/include/generated/asm/clkdev.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/div64.h
  WRAP    arch/powerpc/include/generated/asm/vtime.h
  WRAP    arch/powerpc/include/generated/asm/irq_regs.h
  CHK     include/generated/uapi/linux/version.h
  UPD     include/generated/uapi/linux/version.h
  HOSTCC  scripts/kallsyms
  HOSTCC  scripts/conmakehash
  HOSTCC  scripts/asn1_compiler
  HOSTCC  scripts/dtc/dtc.o
  CC      scripts/mod/empty.o
  HOSTCC  scripts/dtc/flattree.o
  HOSTCC  scripts/mod/mk_elfconfig
  HOSTCC  scripts/dtc/fstree.o
  HOSTCC  scripts/dtc/data.o
  CC      scripts/mod/devicetable-offsets.s
  HOSTCC  scripts/dtc/livetree.o
  HOSTCC  scripts/dtc/treesource.o
  HOSTCC  scripts/dtc/srcpos.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-parser.tab.o
  HOSTCC  scripts/dtc/dtc-lexer.lex.o
  GEN     scripts/mod/devicetable-offsets.h
  UPD     include/config/kernel.release
  Using /home/kisskb/slave/src as source for kernel
  CHK     include/generated/utsrelease.h
  UPD     include/generated/utsrelease.h
  CHK     include/generated/timeconst.h
  CC      kernel/bounds.s
  UPD     include/generated/timeconst.h
  MKELF   scripts/mod/elfconfig.h
  HOSTCC  scripts/mod/modpost.o
  HOSTCC  scripts/mod/file2alias.o
  HOSTCC  scripts/mod/sumversion.o
  CHK     include/generated/bounds.h
  UPD     include/generated/bounds.h
  CC      arch/powerpc/kernel/asm-offsets.s
  CHK     include/generated/asm-offsets.h
  UPD     include/generated/asm-offsets.h
  CALL    /home/kisskb/slave/src/scripts/checksyscalls.sh
  HOSTLD  scripts/dtc/dtc
  HOSTLD  scripts/mod/modpost
  LD      usr/built-in.o
  CC      init/main.o
  CHK     include/generated/compile.h
  CC      init/do_mounts.o
  CC      init/do_mounts_rd.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
  CC      arch/powerpc/mm/mem.o
  CC      arch/powerpc/mm/pgtable.o
  CC      arch/powerpc/mm/mmap.o
  LD      arch/powerpc/math-emu/built-in.o
  CC      arch/powerpc/mm/init_64.o
  CC      arch/powerpc/mm/hash_utils_64.o
  AS      arch/powerpc/mm/slb_low.o
  CC      arch/powerpc/sysdev/mpic.o
  CC      arch/powerpc/sysdev/mpic_u3msi.o
  CC      arch/powerpc/sysdev/mpic_msi.o
  CC      arch/powerpc/mm/slb.o
  CC      arch/powerpc/mm/pgtable_64.o
  CC      arch/powerpc/sysdev/mpic_msgr.o
  CC      arch/powerpc/mm/hash_native_64.o
  CC      arch/powerpc/sysdev/msi_bitmap.o
  AS      arch/powerpc/mm/hash_low_64.o
  CC      arch/powerpc/sysdev/dart_iommu.o
  CC      arch/powerpc/mm/tlb_hash64.o
  CC      arch/powerpc/mm/icswx_pid.o
  CC      arch/powerpc/sysdev/dcr.o
  CC      arch/powerpc/sysdev/i8259.o
  AS      arch/powerpc/lib/string.o
  CC      arch/powerpc/mm/mmu_context_hash64.o
  CC      arch/powerpc/mm/icswx.o
  CC      arch/powerpc/sysdev/scom.o
  CC      arch/powerpc/mm/vphn.o
  CC      arch/powerpc/mm/hugetlbpage.o
  CC      arch/powerpc/lib/alloc.o
  CC      arch/powerpc/mm/slice.o
  AS      arch/powerpc/lib/crtsavres.o
  LD      arch/powerpc/net/built-in.o
  CC      arch/powerpc/lib/ppc_ksyms.o
  CC      arch/powerpc/mm/hugetlbpage-hash64.o
  CC      arch/powerpc/platforms/cell/cbe_regs.o
  CC      arch/powerpc/mm/copro_fault.o
  AS      arch/powerpc/crypto/sha1-powerpc-asm.o
  CC      arch/powerpc/crypto/sha1.o
  CC      arch/powerpc/platforms/powermac/pic.o
  CC      arch/powerpc/platforms/pseries/lpar.o
  CC      arch/powerpc/lib/code-patching.o
  AS      arch/powerpc/platforms/pseries/hvCall.o
  CC      arch/powerpc/platforms/powernv/setup.o
  CC      arch/powerpc/sysdev/xics/xics-common.o
  CC      arch/powerpc/kvm/book3s_exports.o
  AS      arch/powerpc/platforms/powernv/opal-wrappers.o
  CC      arch/powerpc/sysdev/xics/icp-native.o
  CC      arch/powerpc/kernel/cputable.o
  CC      arch/powerpc/kvm/../../../virt/kvm/kvm_main.o
  CC      arch/powerpc/kernel/ptrace.o
  CC      kernel/fork.o
  CC      arch/powerpc/platforms/powernv/opal.o
  CC      arch/powerpc/kvm/../../../virt/kvm/eventfd.o
  CC      arch/powerpc/kvm/powerpc.o
  CC      arch/powerpc/kvm/emulate_loadstore.o
  CC      arch/powerpc/kvm/book3s.o
  CC      arch/powerpc/kvm/book3s_64_vio.o
  CC      arch/powerpc/platforms/powernv/opal-async.o
  CC      arch/powerpc/kernel/syscalls.o
  CC      arch/powerpc/platforms/pseries/nvram.o
  CC      arch/powerpc/sysdev/xics/icp-hv.o
  CC      arch/powerpc/kernel/irq.o
  CC      arch/powerpc/platforms/cell/interrupt.o
  CC      arch/powerpc/platforms/cell/pervasive.o
  CC      arch/powerpc/kernel/align.o
  CC      arch/powerpc/kvm/book3s_rtas.o
  CC      arch/powerpc/kvm/book3s_hv.o
/home/kisskb/slave/src/init/do_mounts_rd.c: In function 'rd_load_image':
/home/kisskb/slave/src/init/do_mounts_rd.c:299:1: internal compiler error: in change_address_1, at emit-rtl.c:1933
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
  CC      arch/powerpc/lib/feature-fixups.o
/home/kisskb/slave/src/scripts/Makefile.build:258: recipe for target 'init/do_mounts_rd.o' failed
make[2]: *** [init/do_mounts_rd.o] Error 1
make[2]: *** Waiting for unfinished jobs....
  CC      arch/powerpc/platforms/powermac/setup.o
  CC      arch/powerpc/platforms/cell/smp.o
  CC      arch/powerpc/platforms/powernv/idle.o
  LD      arch/powerpc/crypto/sha1-powerpc.o
  LD      arch/powerpc/crypto/built-in.o
  AS      arch/powerpc/lib/checksum_64.o
  CC      kernel/exec_domain.o
  CC      arch/powerpc/lib/checksum_wrappers_64.o
  AS      arch/powerpc/lib/feature-fixups-test.o
  CC      arch/powerpc/platforms/powernv/opal-rtc.o
  CC      arch/powerpc/platforms/powermac/time.o
/home/kisskb/slave/src/arch/powerpc/mm/hash_native_64.c: In function 'native_hpte_clear':
/home/kisskb/slave/src/arch/powerpc/mm/hash_native_64.c:83:36: error: 'a_size' may be used uninitialized in this function [-Werror=uninitialized]
/home/kisskb/slave/src/arch/powerpc/mm/hash_native_64.c:523:12: note: 'a_size' was declared here
  CC      arch/powerpc/platforms/powermac/feature.o
cc1: all warnings being treated as errors
/home/kisskb/slave/src/scripts/Makefile.build:258: recipe for target 'arch/powerpc/mm/hash_native_64.o' failed
make[2]: *** [arch/powerpc/mm/hash_native_64.o] Error 1
make[2]: *** Waiting for unfinished jobs....
  AS      arch/powerpc/kvm/book3s_hv_interrupts.o
  CC      arch/powerpc/platforms/powermac/pci.o
  CC      arch/powerpc/lib/xor_vmx.o
  CC      mm/filemap.o
  CC      arch/powerpc/sysdev/xics/ics-rtas.o
  CC      arch/powerpc/kvm/book3s_64_mmu_hv.o
  CC      mm/mempool.o
  CC      mm/oom_kill.o
  CC      mm/maccess.o
  CC      arch/powerpc/sysdev/xics/ics-opal.o
  AS      arch/powerpc/lib/copypage_64.o
  AS      arch/powerpc/lib/copyuser_64.o
  CC      arch/powerpc/platforms/powernv/opal-nvram.o
  CC      arch/powerpc/platforms/powernv/opal-lpc.o
  CC      arch/powerpc/lib/usercopy_64.o
  AS      arch/powerpc/lib/mem_64.o
  AS      arch/powerpc/platforms/powermac/sleep.o
  CC      arch/powerpc/platforms/powermac/low_i2c.o
  CC      arch/powerpc/kvm/book3s_64_vio_hv.o
  AS      arch/powerpc/platforms/powermac/cache.o
  CC      arch/powerpc/platforms/powermac/pfunc_core.o
/home/kisskb/slave/src/Makefile:949: recipe for target 'arch/powerpc/mm' failed
make[1]: *** [arch/powerpc/mm] Error 2
make[1]: *** Waiting for unfinished jobs....
  AS      arch/powerpc/kvm/book3s_hv_rmhandlers.o
  CC      arch/powerpc/kvm/book3s_hv_rm_mmu.o
  CC      arch/powerpc/kvm/book3s_hv_ras.o
  CC      arch/powerpc/kernel/signal_32.o
  CC      arch/powerpc/platforms/powernv/opal-flash.o
  CC      arch/powerpc/kvm/book3s_hv_builtin.o
  CC      kernel/panic.o
  CC      arch/powerpc/platforms/powernv/rng.o
  CC      arch/powerpc/platforms/cell/qpace_setup.o
  CC      arch/powerpc/platforms/powernv/opal-elog.o
  CC      arch/powerpc/platforms/powernv/opal-dump.o
  CC      mm/page_alloc.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
  AS      arch/powerpc/lib/memcpy_64.o
  AS      arch/powerpc/lib/memcmp_64.o
  CC      arch/powerpc/platforms/powermac/pfunc_base.o
/home/kisskb/slave/src/arch/powerpc/kvm/powerpc.c: In function 'kvmppc_complete_mmio_load':
/home/kisskb/slave/src/arch/powerpc/kvm/powerpc.c:780:1: internal compiler error: in change_address_1, at emit-rtl.c:1933
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
/home/kisskb/slave/src/scripts/Makefile.build:258: recipe for target 'arch/powerpc/kvm/powerpc.o' failed
make[2]: *** [arch/powerpc/kvm/powerpc.o] Error 1
make[2]: *** Waiting for unfinished jobs....
  CC      arch/powerpc/kernel/pmc.o
  CC      arch/powerpc/kernel/vdso.o
  CC      arch/powerpc/kernel/process.o
  CC      mm/page-writeback.o
  CPP     arch/powerpc/kernel/systbl_chk.i
  CC      arch/powerpc/platforms/powermac/udbg_scc.o
/home/kisskb/slave/src/arch/powerpc/kernel/align.c: In function 'fix_alignment':
/home/kisskb/slave/src/arch/powerpc/kernel/align.c:1042:1: internal compiler error: in change_address_1, at emit-rtl.c:1933
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
  CC      arch/powerpc/platforms/powernv/opal-sensor.o
  CC      arch/powerpc/platforms/powernv/opal-sysparam.o
/home/kisskb/slave/src/scripts/Makefile.build:258: recipe for target 'arch/powerpc/kernel/align.o' failed
make[2]: *** [arch/powerpc/kernel/align.o] Error 1
make[2]: *** Waiting for unfinished jobs....
  CC      kernel/cpu.o
  CC      kernel/exit.o
  CC      arch/powerpc/lib/locks.o
  CC      arch/powerpc/lib/vmx-helper.o
  CC      arch/powerpc/platforms/powermac/udbg_adb.o
  CC      arch/powerpc/platforms/powermac/nvram.o
/home/kisskb/slave/src/Makefile:949: recipe for target 'init' failed
make[1]: *** [init] Error 2
  CC      arch/powerpc/platforms/powernv/opal-msglog.o
  CC      arch/powerpc/platforms/powermac/smp.o
  CC      arch/powerpc/platforms/powernv/opal-hmi.o
  CC      arch/powerpc/platforms/pseries/reconfig.o
  CC      kernel/softirq.o
  CC      arch/powerpc/platforms/pseries/setup.o
  CC      arch/powerpc/platforms/powernv/opal-power.o
  LD      arch/powerpc/sysdev/xics/built-in.o
  LD      arch/powerpc/sysdev/built-in.o
  CC      arch/powerpc/platforms/pseries/iommu.o
  CC      mm/readahead.o
  CC      arch/powerpc/platforms/pseries/event_sources.o
  CC      arch/powerpc/platforms/pseries/ras.o
  CC      arch/powerpc/platforms/pseries/firmware.o
  CC      kernel/resource.o
  CC      mm/swap.o
  CC      arch/powerpc/platforms/pseries/power.o
  CC      arch/powerpc/platforms/pseries/dlpar.o
  CC      arch/powerpc/platforms/powernv/opal-irqchip.o
/home/kisskb/slave/src/arch/powerpc/kvm/book3s_hv.c: In function 'debugfs_timings_read':
/home/kisskb/slave/src/arch/powerpc/kvm/book3s_hv.c:1529:13: error: 'tb.tb_max' may be used uninitialized in this function [-Werror=uninitialized]
/home/kisskb/slave/src/arch/powerpc/kvm/book3s_hv.c:1529:13: error: 'tb.tb_min' may be used uninitialized in this function [-Werror=uninitialized]
/home/kisskb/slave/src/arch/powerpc/kvm/book3s_hv.c:1529:13: error: 'tb.tb_total' may be used uninitialized in this function [-Werror=uninitialized]
  CC      mm/truncate.o
  CC      kernel/sysctl.o
  CC      arch/powerpc/platforms/pseries/mobility.o
  CC      kernel/sysctl_binary.o
  LD      arch/powerpc/lib/built-in.o
  CC      mm/vmscan.o
cc1: all warnings being treated as errors
/home/kisskb/slave/src/scripts/Makefile.build:258: recipe for target 'arch/powerpc/kvm/book3s_hv.o' failed
make[2]: *** [arch/powerpc/kvm/book3s_hv.o] Error 1
  CC      arch/powerpc/platforms/powernv/smp.o
  CC      arch/powerpc/platforms/pseries/rng.o
  CC      mm/shmem.o
  CC      arch/powerpc/platforms/pseries/smp.o
  CC      arch/powerpc/platforms/powernv/subcore.o
  AS      arch/powerpc/platforms/powernv/subcore-asm.o
  CC      arch/powerpc/platforms/powernv/pci.o
  CC      arch/powerpc/platforms/powernv/pci-p5ioc2.o
  CC      mm/util.o
  CC      kernel/capability.o
  CC      arch/powerpc/platforms/powernv/pci-ioda.o
  CC      kernel/ptrace.o
  CC      arch/powerpc/platforms/powernv/eeh-powernv.o
  LD      arch/powerpc/platforms/cell/built-in.o
  CC      arch/powerpc/platforms/powernv/opal-xscom.o
  CC      mm/mmzone.o
  CC      arch/powerpc/platforms/pseries/eeh_pseries.o
  CC      arch/powerpc/platforms/powernv/opal-tracepoints.o
  CC      arch/powerpc/platforms/powernv/opal-prd.o
  CC      arch/powerpc/platforms/pseries/kexec.o
  CC      mm/vmstat.o
  CC      arch/powerpc/platforms/pseries/pci.o
  CC      mm/backing-dev.o
  CC      kernel/user.o
  CC      arch/powerpc/platforms/pseries/pci_dlpar.o
  CC      arch/powerpc/platforms/pseries/msi.o
/home/kisskb/slave/src/Makefile:949: recipe for target 'arch/powerpc/kvm' failed
make[1]: *** [arch/powerpc/kvm] Error 2
  CC      mm/mm_init.o
  CC      kernel/signal.o
  LD      arch/powerpc/platforms/powermac/built-in.o
  CC      arch/powerpc/platforms/pseries/hotplug-cpu.o
  CC      mm/mmu_context.o
  CC      arch/powerpc/platforms/pseries/io_event_irq.o
  CC      arch/powerpc/platforms/pseries/lparcfg.o
  CC      kernel/sys.o
  CC      kernel/kmod.o
  CC      kernel/workqueue.o
  CC      kernel/pid.o
  CC      mm/percpu.o
  CC      mm/slab_common.o
/home/kisskb/slave/src/Makefile:949: recipe for target 'arch/powerpc/kernel' failed
make[1]: *** [arch/powerpc/kernel] Error 2
  CC      mm/compaction.o
  CC      mm/vmacache.o
/home/kisskb/slave/src/arch/powerpc/platforms/pseries/pci.c: In function 'pseries_root_bridge_prepare':
/home/kisskb/slave/src/arch/powerpc/platforms/pseries/pci.c:136:2: error: 'rc' may be used uninitialized in this function [-Werror=uninitialized]
cc1: all warnings being treated as errors
/home/kisskb/slave/src/scripts/Makefile.build:258: recipe for target 'arch/powerpc/platforms/pseries/pci.o' failed
make[3]: *** [arch/powerpc/platforms/pseries/pci.o] Error 1
make[3]: *** Waiting for unfinished jobs....
  CC      kernel/task_work.o
  CC      kernel/extable.o
  CC      mm/interval_tree.o
  CC      mm/list_lru.o
  CC      kernel/params.o
  CC      mm/workingset.o
  CC      kernel/kthread.o
  CC      mm/debug.o
  CC      mm/gup.o
  CC      mm/highmem.o
  CC      mm/memory.o
  CC      mm/mincore.o
  CC      mm/mlock.o
  CC      kernel/sys_ni.o
  CC      kernel/nsproxy.o
  CC      mm/mmap.o
  CC      kernel/notifier.o
  CC      kernel/ksysfs.o
  CC      mm/mprotect.o
  CC      kernel/cred.o
/home/kisskb/slave/src/arch/powerpc/platforms/pseries/msi.c: In function 'msi_quota_for_device':
/home/kisskb/slave/src/arch/powerpc/platforms/pseries/msi.c:327:24: error: 'total' may be used uninitialized in this function [-Werror=uninitialized]
  CC      kernel/reboot.o
cc1: all warnings being treated as errors
/home/kisskb/slave/src/scripts/Makefile.build:258: recipe for target 'arch/powerpc/platforms/pseries/msi.o' failed
make[3]: *** [arch/powerpc/platforms/pseries/msi.o] Error 1
  CC      mm/mremap.o
  CC      mm/msync.o
  CC      mm/rmap.o
  CC      kernel/async.o
  CC      kernel/range.o
  CC      mm/vmalloc.o
  CC      mm/pagewalk.o
  CC      mm/pgtable-generic.o
  CC      mm/init-mm.o
  CC      kernel/smpboot.o
  CC      kernel/groups.o
  CC      mm/nobootmem.o
  CC      kernel/irq/irqdesc.o
  CC      kernel/power/qos.o
  CC      kernel/locking/mutex.o
  LD      kernel/livepatch/built-in.o
  CC      mm/memblock.o
  CC      kernel/printk/printk.o
/home/kisskb/slave/src/mm/percpu.c: In function 'pcpu_alloc':
/home/kisskb/slave/src/mm/percpu.c:1040:3: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
  CC      mm/page_io.o
  CC      kernel/rcu/update.o
  CC      mm/swap_state.o
  CC      mm/swapfile.o
/home/kisskb/slave/src/scripts/Makefile.build:403: recipe for target 'arch/powerpc/platforms/pseries' failed
make[2]: *** [arch/powerpc/platforms/pseries] Error 2
make[2]: *** Waiting for unfinished jobs....
  CC      kernel/rcu/srcu.o
  CC      kernel/sched/core.o
  CC      kernel/time/time.o
  CC      kernel/time/timer.o
  CC      kernel/printk/braille.o
/home/kisskb/slave/src/mm/mprotect.c: In function 'change_protection':
/home/kisskb/slave/src/include/linux/spinlock.h:347:2: warning: 'ptl' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/mm/mprotect.c:68:14: note: 'ptl' was declared here
  CC      kernel/trace/trace_clock.o
  CC      kernel/rcu/rcutorture.o
  CC      mm/frontswap.o
  CC      mm/dmapool.o
  CC      mm/hugetlb.o
  CC      kernel/kcmp.o
  CC      mm/sparse.o
  CC      kernel/stacktrace.o
  CC      mm/slob.o
  CC      mm/mmu_notifier.o
  CC      kernel/power/poweroff.o
  CC      kernel/sched/loadavg.o
  CC      kernel/futex.o
  LD      arch/powerpc/platforms/powernv/built-in.o
/home/kisskb/slave/src/Makefile:949: recipe for target 'arch/powerpc/platforms' failed
make[1]: *** [arch/powerpc/platforms] Error 2
  CC      kernel/locking/semaphore.o
  CC      mm/memtest.o
  CC      mm/migrate.o
  CC      mm/page_owner.o
  CC      mm/page_isolation.o
  CC      mm/zpool.o
  CC      kernel/sched/clock.o
  CC      kernel/futex_compat.o
  CC      mm/cma.o
  CC      mm/balloon_compaction.o
  CC      kernel/irq/handle.o
  CC      kernel/dma.o
/home/kisskb/slave/src/mm/memblock.c: In function '__next_mem_pfn_range':
/home/kisskb/slave/src/mm/memblock.c:1103:15: warning: 'r' may be used uninitialized in this function [-Wuninitialized]
  CC      kernel/trace/ftrace.o
  CC      kernel/rcu/tree.o
  CC      kernel/smp.o
  CC      mm/page_ext.o
  CC      kernel/kallsyms.o
  CC      mm/cma_debug.o
  CC      mm/userfaultfd.o
  CC      kernel/acct.o
  CC      kernel/kexec.o
  CC      kernel/backtracetest.o
  CC      kernel/compat.o
  CC      kernel/cgroup.o
  CC      kernel/trace/ring_buffer.o
  CC      kernel/utsname.o
  CC      kernel/sched/cputime.o
  CC      kernel/user_namespace.o
  CC      kernel/locking/rwsem.o
  CC      kernel/locking/percpu-rwsem.o
/home/kisskb/slave/src/mm/memory.c: In function 'remap_pfn_range':
/home/kisskb/slave/src/include/linux/spinlock.h:347:2: warning: 'ptl' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/mm/memory.c:1627:14: note: 'ptl' was declared here
  CC      kernel/locking/mutex-debug.o
  CC      kernel/time/hrtimer.o
  CC      kernel/trace/trace.o
  CC      kernel/trace/trace_output.o
/home/kisskb/slave/src/mm/memory.c: In function 'copy_page_range':
/home/kisskb/slave/src/include/linux/spinlock.h:347:2: warning: 'dst_ptl' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/mm/memory.c:894:24: note: 'dst_ptl' was declared here
  CC      kernel/locking/lockdep.o
  CC      kernel/sched/idle_task.o
/home/kisskb/slave/src/mm/page_isolation.c: In function 'unset_migratetype_isolate':
/home/kisskb/slave/src/mm/page_isolation.c:128:15: warning: 'order' may be used uninitialized in this function [-Wuninitialized]
  LD      kernel/power/built-in.o
  CC      kernel/sched/fair.o
  CC      kernel/sched/rt.o
  CC      kernel/trace/trace_seq.o
  CC      kernel/pid_namespace.o
  CC      kernel/sched/deadline.o
  CC      kernel/stop_machine.o
  CC      kernel/sched/stop_task.o
/home/kisskb/slave/src/kernel/futex_compat.c: In function 'compat_exit_robust_list':
/home/kisskb/slave/src/kernel/futex_compat.c:116:21: warning: 'pip' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/kernel/futex_compat.c:113:2: warning: 'pending' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/kernel/futex_compat.c:94:3: warning: 'entry' may be used uninitialized in this function [-Wuninitialized]
  CC      kernel/irq/manage.o
  CC      kernel/time/itimer.o
  CC      kernel/sched/wait.o
  CC      kernel/relay.o
  CC      kernel/trace/trace_stat.o
  CC      kernel/locking/lockdep_proc.o
/home/kisskb/slave/src/kernel/user_namespace.c: In function 'map_id_up':
/home/kisskb/slave/src/kernel/user_namespace.c:219:6: warning: 'first' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/kernel/user_namespace.c: In function 'map_id_down':
/home/kisskb/slave/src/kernel/user_namespace.c:196:6: warning: 'first' may be used uninitialized in this function [-Wuninitialized]
  CC      kernel/time/posix-timers.o
/home/kisskb/slave/src/mm/swapfile.c: In function 'SyS_swapon':
/home/kisskb/slave/src/mm/swapfile.c:2456:2: warning: 'nr_extents' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/mm/swapfile.c:2254:6: note: 'nr_extents' was declared here
  CC      kernel/tracepoint.o
/home/kisskb/slave/src/kernel/user_namespace.c: In function 'map_write':
/home/kisskb/slave/src/kernel/user_namespace.c:173:6: warning: 'first' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/kernel/user_namespace.c:157:6: note: 'first' was declared here
  CC      kernel/locking/spinlock.o
  CC      kernel/locking/osq_lock.o
  CC      kernel/elfcore.o
  CC      kernel/sched/completion.o
  CC      kernel/locking/lglock.o
  CC      kernel/locking/rtmutex.o
  CC      kernel/sched/idle.o
  CC      kernel/sched/cpupri.o
  CC      kernel/locking/spinlock_debug.o
  CC      kernel/locking/rwsem-xadd.o
  CC      kernel/irq/spurious.o
/home/kisskb/slave/src/kernel/futex.c: In function 'exit_robust_list':
/home/kisskb/slave/src/kernel/futex.c:3025:21: warning: 'pip' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/kernel/futex.c:3024:2: warning: 'pending' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/kernel/futex.c:3007:3: warning: 'entry' may be used uninitialized in this function [-Wuninitialized]
  CC      kernel/trace/trace_printk.o
  LD      kernel/printk/built-in.o
  CC      kernel/irq_work.o
  CC      kernel/irq/resend.o
  CC      kernel/crash_dump.o
  CC      kernel/jump_label.o
  CC      kernel/locking/locktorture.o
/home/kisskb/slave/src/kernel/cgroup.c: In function 'cgroup_put':
/home/kisskb/slave/src/include/linux/percpu-refcount.h:276:1: warning: 'percpu_count' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/include/linux/percpu-refcount.h:271:26: note: 'percpu_count' was declared here
/home/kisskb/slave/src/kernel/cgroup.c: In function 'cgroup_get':
/home/kisskb/slave/src/include/linux/percpu-refcount.h:177:1: warning: 'percpu_count' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/include/linux/percpu-refcount.h:172:26: note: 'percpu_count' was declared here
  CC      kernel/context_tracking.o
  CC      kernel/torture.o
  CC      kernel/time/posix-cpu-timers.o
  CC      kernel/sched/cpudeadline.o
  CC      kernel/sched/auto_group.o
  CC      kernel/time/timekeeping.o
  CC      kernel/trace/trace_sched_switch.o
  CC      kernel/sched/stats.o
  CC      kernel/trace/trace_functions.o
  CC      kernel/time/ntp.o
  CC      kernel/trace/trace_nop.o
  CC      kernel/time/clocksource.o
/home/kisskb/slave/src/kernel/cgroup.c: In function 'init_and_link_css':
/home/kisskb/slave/src/include/linux/percpu-refcount.h:177:1: warning: 'percpu_count' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/include/linux/percpu-refcount.h:172:26: note: 'percpu_count' was declared here
  CC      kernel/trace/trace_branch.o
  CC      kernel/time/jiffies.o
/home/kisskb/slave/src/kernel/cgroup.c: In function 'cgroup_kn_lock_live':
/home/kisskb/slave/src/include/linux/percpu-refcount.h:214:1: warning: 'percpu_count' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/include/linux/percpu-refcount.h:208:26: note: 'percpu_count' was declared here
  CC      kernel/trace/blktrace.o
  CC      kernel/trace/trace_events.o
  LD      mm/built-in.o
  CC      kernel/irq/chip.o
  CC      kernel/trace/trace_export.o
/home/kisskb/slave/src/kernel/cgroup.c: In function 'css_killed_work_fn':
/home/kisskb/slave/src/include/linux/percpu-refcount.h:276:1: warning: 'percpu_count' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/include/linux/percpu-refcount.h:271:26: note: 'percpu_count' was declared here
  CC      kernel/trace/trace_events_filter.o
  CC      kernel/trace/trace_events_trigger.o
  CC      kernel/time/timer_list.o
/home/kisskb/slave/src/kernel/cgroup.c: In function 'kill_css':
/home/kisskb/slave/src/include/linux/percpu-refcount.h:177:1: warning: 'percpu_count' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/include/linux/percpu-refcount.h:172:26: note: 'percpu_count' was declared here
  CC      kernel/trace/power-traces.o
  CC      kernel/irq/dummychip.o
  CC      kernel/time/timeconv.o
  CC      kernel/irq/devres.o
  CC      kernel/irq/irqdomain.o
  CC      kernel/time/timecounter.o
/home/kisskb/slave/src/kernel/cgroup.c: In function 'cgroup_get_e_css':
/home/kisskb/slave/src/include/linux/percpu-refcount.h:177:1: warning: 'percpu_count' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/include/linux/percpu-refcount.h:172:26: note: 'percpu_count' was declared here
/home/kisskb/slave/src/include/linux/percpu-refcount.h:248:1: warning: 'percpu_count' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/include/linux/percpu-refcount.h:242:26: note: 'percpu_count' was declared here
  CC      kernel/time/posix-clock.o
  CC      kernel/time/alarmtimer.o
  CC      kernel/time/clockevents.o
  CC      kernel/irq/proc.o
  CC      kernel/time/tick-common.o
  CC      kernel/irq/msi.o
  CC      kernel/time/tick-broadcast.o
/home/kisskb/slave/src/kernel/cgroup.c: In function 'cgroup_mount':
/home/kisskb/slave/src/kernel/cgroup.c:1910:13: warning: 'root' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/include/linux/percpu-refcount.h:248:1: warning: 'percpu_count' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/include/linux/percpu-refcount.h:242:26: note: 'percpu_count' was declared here
/home/kisskb/slave/src/include/linux/percpu-refcount.h:248:1: warning: 'percpu_count' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/include/linux/percpu-refcount.h:242:26: note: 'percpu_count' was declared here
  CC      kernel/time/tick-broadcast-hrtimer.o
  CC      kernel/time/tick-oneshot.o
  CC      kernel/time/tick-sched.o
/home/kisskb/slave/src/kernel/cgroup.c: In function 'css_free_work_fn':
/home/kisskb/slave/src/include/linux/percpu-refcount.h:276:1: warning: 'percpu_count' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/include/linux/percpu-refcount.h:271:26: note: 'percpu_count' was declared here
  CC      kernel/time/timekeeping_debug.o
  CC      kernel/time/test_udelay.o
  LD      kernel/locking/built-in.o
  LD      kernel/rcu/built-in.o
  LD      kernel/trace/libftrace.o
  LD      kernel/irq/built-in.o
/home/kisskb/slave/src/kernel/cgroup.c: In function 'css_tryget_online_from_dir':
/home/kisskb/slave/src/include/linux/percpu-refcount.h:248:1: warning: 'percpu_count' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/include/linux/percpu-refcount.h:242:26: note: 'percpu_count' was declared here
/home/kisskb/slave/src/kernel/trace/trace_events.c: In function 'event_enable_read':
/home/kisskb/slave/src/kernel/trace/trace_events.c:781:2: warning: 'flags' may be used uninitialized in this function [-Wuninitialized]
  LD      kernel/time/built-in.o
/home/kisskb/slave/src/kernel/trace/trace_events.c: In function 'trace_event_enum_update':
/home/kisskb/slave/src/kernel/trace/trace_events.c:1830:5: warning: 'last_i' may be used uninitialized in this function [-Wuninitialized]
  LD      kernel/trace/built-in.o
  LD      kernel/sched/built-in.o
  LD      kernel/built-in.o
make[1]: Leaving directory '/home/kisskb/slave/build/mpe_powerpc-randconfig_powerpc'
Makefile:146: recipe for target 'sub-make' failed
make: *** [sub-make] Error 2
Command 'make -j 48 ARCH=powerpc O=/home/kisskb/slave/build/mpe_powerpc-randconfig_powerpc CROSS_COMPILE=/opt/cross/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  ' returned non-zero exit status 2
# rm -rf /home/kisskb/slave/build/mpe_powerpc-randconfig_powerpc
# Build took: 0:00:17.696800