# git rev-parse -q --verify e1c0d66fcb179a1737b3d5cc11c6e37bcabbd861^{commit}
e1c0d66fcb179a1737b3d5cc11c6e37bcabbd861
already have revision, skipping fetch
# git checkout -q -f -B kisskb e1c0d66fcb179a1737b3d5cc11c6e37bcabbd861
# git clean -qxdf
# git log -1
commit e1c0d66fcb179a1737b3d5cc11c6e37bcabbd861
Author: Simon Guo <wei.guo.simon@gmail.com>
Date:   Tue Jul 26 16:06:01 2016 +0800

    powerpc: Set used_(vsr|vr|spe) in sigreturn path when MSR bits are active
    
    Normally, when MSR[VSX/VR/SPE] bits == 1, the used_vsr/used_vr/used_spe
    bit have already been set. However when loading a signal frame from user
    space we need to explicitly set used_vsr/used_vr/used_spe to make them
    consistent with the MSR bits from the signal frame.
    
    For example, CRIU application, who utilizes sigreturn to restore
    checkpointed process, will lead to the case where MSR[VSX] bit is active
    in signal frame, but used_vsr bit is not set in the kernel. (the same
    applies to VR/SPE).
    
    This patch fixes this by always setting used_* bit when MSR related bits
    are active in signal frame and we are doing sigreturn.
    
    Based on a proposal by Benh.
    
    Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
    Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
    [mpe: Massage change log]
    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 e1c0d66fcb179a1737b3d5cc11c6e37bcabbd861
# < make -j 48 ARCH=powerpc O=/home/kisskb/slave/build/powerpc-next_powerpc-randconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  randconfig
KCONFIG_SEED=0x8BDF74B7
# 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
# yes \n | make -j 48 ARCH=powerpc O=/home/kisskb/slave/build/powerpc-next_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 48 ARCH=powerpc O=/home/kisskb/slave/build/powerpc-next_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-next_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/div64.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/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
  CHK     include/generated/utsrelease.h
  UPD     include/generated/utsrelease.h
  HOSTCC  scripts/kallsyms
  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
  CC      scripts/mod/devicetable-offsets.s
  HOSTCC  scripts/dtc/data.o
  HOSTCC  scripts/dtc/livetree.o
  HOSTCC  scripts/dtc/treesource.o
  HOSTCC  scripts/dtc/srcpos.o
  HOSTCC  scripts/dtc/checks.o
  SHIPPED scripts/dtc/dtc-lexer.lex.c
  HOSTCC  scripts/dtc/util.o
  SHIPPED scripts/dtc/dtc-parser.tab.h
  SHIPPED scripts/dtc/dtc-parser.tab.c
  HOSTCC  scripts/dtc/dtc-parser.tab.o
  CHK     include/generated/timeconst.h
  CC      kernel/bounds.s
  UPD     include/generated/timeconst.h
  GEN     scripts/mod/devicetable-offsets.h
  HOSTCC  scripts/dtc/dtc-lexer.lex.o
  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
  CC      init/main.o
  CHK     include/generated/compile.h
  HOSTCC  usr/gen_init_cpio
  CC      init/do_mounts.o
  CC      init/do_mounts_initrd.o
  CC      init/initramfs.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
  CC      arch/powerpc/mm/init_64.o
  CC      arch/powerpc/mm/pgtable_64.o
  AS      arch/powerpc/mm/tlb_nohash_low.o
  CC      arch/powerpc/mm/mmu_context_nohash.o
  CC      arch/powerpc/mm/tlb_nohash.o
  AS      arch/powerpc/mm/tlb_low_64e.o
  CC      arch/powerpc/mm/pgtable-book3e.o
  AS      arch/powerpc/lib/string.o
  CC      arch/powerpc/mm/hugetlbpage.o
  CC      arch/powerpc/lib/alloc.o
  CC      arch/powerpc/mm/numa.o
  CC      arch/powerpc/lib/ppc_ksyms.o
  AS      arch/powerpc/lib/crtsavres.o
  CC      arch/powerpc/lib/code-patching.o
  CC      arch/powerpc/sysdev/mpic_msi.o
  CC      arch/powerpc/sysdev/mpic.o
  CC      arch/powerpc/sysdev/mpic_u3msi.o
  CC      arch/powerpc/sysdev/fsl_soc.o
  CC      arch/powerpc/sysdev/msi_bitmap.o
  CC      arch/powerpc/sysdev/fsl_lbc.o
  CC      arch/powerpc/kernel/syscalls.o
  CC      arch/powerpc/kernel/ptrace.o
  CC      arch/powerpc/lib/sstep.o
  AS      arch/powerpc/lib/ldstfp.o
  CC      arch/powerpc/lib/checksum_wrappers.o
  AS      arch/powerpc/lib/feature-fixups-test.o
  CC      arch/powerpc/lib/feature-fixups.o
  AS      arch/powerpc/lib/copypage_64.o
  AS      arch/powerpc/lib/checksum_64.o
  CC      arch/powerpc/platforms/85xx/common.o
  CC      arch/powerpc/sysdev/fsl_mpic_err.o
  CC      arch/powerpc/sysdev/fsl_pci.o
  CC      arch/powerpc/kernel/cputable.o
  CC      arch/powerpc/sysdev/fsl_msi.o
  AS      arch/powerpc/lib/copyuser_64.o
  LD      arch/powerpc/math-emu/built-in.o
  CC      arch/powerpc/sysdev/indirect_pci.o
  CC      arch/powerpc/lib/usercopy_64.o
  CC      arch/powerpc/kernel/irq.o
  AS      arch/powerpc/lib/mem_64.o
  AS      arch/powerpc/lib/hweight_64.o
  AS      arch/powerpc/crypto/md5-asm.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/net/bpf_jit_asm64.o
  AS      arch/powerpc/lib/memcpy_64.o
  CC      arch/powerpc/crypto/md5-glue.o
  AS      arch/powerpc/lib/memcmp_64.o
  CC      arch/powerpc/net/bpf_jit_comp64.o
  CC      arch/powerpc/kernel/align.o
  CC      arch/powerpc/kernel/signal_32.o
  CC      arch/powerpc/kernel/pmc.o
  CC      arch/powerpc/kernel/vdso.o
  CC      arch/powerpc/kernel/process.o
  CPP     arch/powerpc/kernel/systbl_chk.i
  CC      arch/powerpc/kernel/idle.o
/home/kisskb/slave/src/arch/powerpc/lib/sstep.c: In function 'emulate_step':
/home/kisskb/slave/src/arch/powerpc/lib/sstep.c:1992:7: error: implicit declaration of function 'cpu_has_feature' [-Werror=implicit-function-declaration]
  CC      arch/powerpc/kernel/signal.o
cc1: some warnings being treated as errors
  CC      arch/powerpc/kernel/sysfs.o
/home/kisskb/slave/src/scripts/Makefile.build:289: recipe for target 'arch/powerpc/lib/sstep.o' failed
make[2]: *** [arch/powerpc/lib/sstep.o] Error 1
make[2]: *** Waiting for unfinished jobs....
  CC      arch/powerpc/kernel/cacheinfo.o
  LD      arch/powerpc/platforms/85xx/built-in.o
  GEN     usr/initramfs_data.cpio.lz4
  LD      arch/powerpc/platforms/built-in.o
  CC      arch/powerpc/xmon/xmon.o
  CC      arch/powerpc/xmon/nonstdio.o
  CC      arch/powerpc/kernel/time.o
  CC      arch/powerpc/kernel/prom.o
  AS      arch/powerpc/xmon/spr_access.o
  CC      arch/powerpc/kernel/traps.o
  CC      arch/powerpc/kernel/setup-common.o
  CC      arch/powerpc/kernel/io.o
  CC      arch/powerpc/kernel/udbg.o
  AS      arch/powerpc/kernel/misc.o
  CC      arch/powerpc/kernel/dma.o
  AS      arch/powerpc/kernel/misc_64.o
  CC      arch/powerpc/kernel/prom_parse.o
  CC      arch/powerpc/kernel/of_platform.o
  CC      arch/powerpc/kernel/setup_64.o
  LD      certs/built-in.o
  CC      arch/powerpc/kernel/sys_ppc32.o
  CC      arch/powerpc/kernel/signal_64.o
  CC      arch/powerpc/kernel/paca.o
  CC      arch/powerpc/kernel/ptrace32.o
/home/kisskb/slave/src/Makefile:968: recipe for target 'arch/powerpc/lib' failed
make[1]: *** [arch/powerpc/lib] Error 2
make[1]: *** Waiting for unfinished jobs....
  CC      arch/powerpc/kernel/nvram_64.o
  AS      usr/initramfs_data.o
  CC      arch/powerpc/kernel/firmware.o
  AS      arch/powerpc/kernel/idle_book3e.o
  AS      arch/powerpc/kernel/exceptions-64e.o
  CC      arch/powerpc/kernel/proc_powerpc.o
  CC      arch/powerpc/kernel/module.o
  CC      arch/powerpc/kernel/module_64.o
  LD      usr/built-in.o
  CC      arch/powerpc/kernel/dma-iommu.o
  CC      arch/powerpc/kernel/dbell.o
  LDS     arch/powerpc/kernel/vdso32/vdso32.lds
  CC      arch/powerpc/kernel/iommu.o
  VDSO32A arch/powerpc/kernel/vdso32/sigtramp.o
  VDSO32A arch/powerpc/kernel/vdso32/gettimeofday.o
  CC      arch/powerpc/kernel/ppc_ksyms.o
  LDS     arch/powerpc/kernel/vdso64/vdso64.lds
  LD      arch/powerpc/crypto/md5-ppc.o
  LD      arch/powerpc/crypto/built-in.o
  VDSO32A arch/powerpc/kernel/vdso32/datapage.o
  CC      arch/powerpc/kernel/legacy_serial.o
  VDSO32A arch/powerpc/kernel/vdso32/cacheflush.o
  AS      arch/powerpc/kernel/vdso64/sigtramp.o
  VDSO32A arch/powerpc/kernel/vdso32/note.o
  VDSO32A arch/powerpc/kernel/vdso32/getcpu.o
  AS      arch/powerpc/kernel/vdso64/gettimeofday.o
  AS      arch/powerpc/kernel/vdso64/datapage.o
  LD      arch/powerpc/mm/built-in.o
  CC      arch/powerpc/kernel/udbg_16550.o
  AS      arch/powerpc/kernel/vdso64/cacheflush.o
  CC      arch/powerpc/kernel/stacktrace.o
  CC      arch/powerpc/kernel/pci_64.o
  AS      arch/powerpc/kernel/vdso64/note.o
  VDSO32L arch/powerpc/kernel/vdso32/vdso32.so.dbg
  CC      arch/powerpc/kernel/pci_dn.o
  AS      arch/powerpc/kernel/vdso64/getcpu.o
  CC      arch/powerpc/kernel/pci-hotplug.o
  OBJCOPY arch/powerpc/kernel/vdso32/vdso32.so
  CC      arch/powerpc/kernel/pci-common.o
  CC      arch/powerpc/kernel/isa-bridge.o
  AS      arch/powerpc/kernel/vdso32/vdso32_wrapper.o
  CC      arch/powerpc/kernel/pci_of_scan.o
  CC      arch/powerpc/kernel/iomap.o
  AS      arch/powerpc/kernel/ppc_save_regs.o
  CC      kernel/fork.o
  AS      arch/powerpc/kernel/head_64.o
  LDS     arch/powerpc/kernel/vmlinux.lds
  CC      arch/powerpc/kernel/msi.o
  AS      arch/powerpc/kernel/fpu.o
  VDSO64L arch/powerpc/kernel/vdso64/vdso64.so.dbg
  AS      arch/powerpc/kernel/entry_64.o
  OBJCOPY arch/powerpc/kernel/vdso64/vdso64.so
  LD      arch/powerpc/kernel/vdso32/built-in.o
  AS      arch/powerpc/kernel/vdso64/vdso64_wrapper.o
  CALL    /home/kisskb/slave/src/arch/powerpc/kernel/systbl_chk.sh
  AS      arch/powerpc/kernel/systbl.o
  CC      kernel/panic.o
  CC      kernel/exec_domain.o
  CC      kernel/softirq.o
  CC      kernel/exit.o
  CC      kernel/cpu.o
  CC      kernel/resource.o
  CC      kernel/sysctl.o
  CC      kernel/sysctl_binary.o
  CC      kernel/capability.o
  CC      kernel/ptrace.o
  CC      kernel/user.o
  CC      kernel/sys.o
  CC      kernel/signal.o
  LD      arch/powerpc/kernel/vdso64/built-in.o
  CC      kernel/workqueue.o
  CC      kernel/kmod.o
  CC      kernel/task_work.o
  CC      kernel/extable.o
  CC      kernel/pid.o
  LD      init/mounts.o
  CC      kernel/params.o
  CC      kernel/kthread.o
  CC      kernel/sys_ni.o
  LD      init/built-in.o
  CC      kernel/nsproxy.o
  CC      kernel/ksysfs.o
  CC      kernel/notifier.o
  CC      kernel/cred.o
  CC      kernel/reboot.o
  CC      kernel/async.o
  CC      kernel/range.o
  CC      kernel/smpboot.o
  LD      arch/powerpc/sysdev/built-in.o
  CC      kernel/bpf/core.o
  LD      kernel/livepatch/built-in.o
  CC      kernel/printk/printk.o
  CC      kernel/gcov/base.o
  CC      kernel/locking/mutex.o
  CC      kernel/rcu/update.o
  CC      kernel/irq/irqdesc.o
  CC      kernel/power/qos.o
  CC      kernel/sched/core.o
  CC      kernel/sched/loadavg.o
  CC      kernel/stacktrace.o
  CC      kernel/sched/clock.o
  CC      kernel/futex.o
  CC      kernel/time/time.o
  CC      kernel/futex_compat.o
  CC      kernel/time/timer.o
  CC      kernel/up.o
  CC      kernel/dma.o
  CC      kernel/module.o
  CC      kernel/time/hrtimer.o
  CC      kernel/kallsyms.o
  CC      kernel/backtracetest.o
  CC      kernel/compat.o
  CC      kernel/cgroup.o
  CC      kernel/hung_task.o
  CC      kernel/relay.o
  CC      kernel/time/itimer.o
  CC      kernel/utsname_sysctl.o
  CC      kernel/latencytop.o
  CC      kernel/elfcore.o
  CC      kernel/irq_work.o
  CC      kernel/torture.o
  CC      kernel/gcov/fs.o
  CC      kernel/memremap.o
  GZIP    kernel/config_data.gz
  CC      kernel/gcov/gcc_3_4.o
  CC      kernel/sched/cputime.o
  CHK     kernel/config_data.h
  CC      kernel/rcu/sync.o
  CC      kernel/sched/idle_task.o
  CC      kernel/time/posix-timers.o
  UPD     kernel/config_data.h
  CC [M]  kernel/configs.o
  CC      kernel/sched/fair.o
  CC      kernel/rcu/srcu.o
  CC      kernel/sched/rt.o
  LD      arch/powerpc/kernel/built-in.o
  CC      kernel/irq/handle.o
  CC      kernel/irq/manage.o
  CC      kernel/sched/stop_task.o
  CC      kernel/sched/wait.o
  CC      kernel/sched/deadline.o
  LD      arch/powerpc/net/built-in.o
  CC      kernel/irq/spurious.o
  CC      kernel/sched/swait.o
  LD      arch/powerpc/xmon/built-in.o
  CC      kernel/irq/resend.o
  CC      kernel/time/posix-cpu-timers.o
  CC      kernel/sched/completion.o
  CC      kernel/sched/idle.o
  CC      kernel/time/timekeeping.o
  CC      kernel/sched/auto_group.o
/home/kisskb/slave/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/home/kisskb/slave/src/kernel/printk/printk.c:183:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
  CC      kernel/time/clocksource.o
  CC      kernel/time/ntp.o
  CC      kernel/locking/semaphore.o
  CC      kernel/sched/stats.o
  CC      kernel/time/jiffies.o
  CC      kernel/power/main.o
  CC      kernel/power/poweroff.o
  CC      kernel/time/timer_list.o
  CC      kernel/rcu/rcutorture.o
  CC      kernel/sched/debug.o
  CC      kernel/rcu/tiny.o
  CC      kernel/time/timeconv.o
  CC      kernel/irq/chip.o
  CC      kernel/time/timecounter.o
  CC      kernel/irq/dummychip.o
  CC      kernel/time/posix-clock.o
  CC      kernel/irq/devres.o
  CC      kernel/time/alarmtimer.o
  CC      kernel/irq/generic-chip.o
  CC      kernel/time/clockevents.o
  CC      kernel/irq/irqdomain.o
  CC      kernel/time/tick-common.o
  CC      kernel/irq/proc.o
  CC      kernel/irq/msi.o
  CC      kernel/time/timer_stats.o
  CC      kernel/time/timekeeping_debug.o
  LD      kernel/gcov/built-in.o
  CC      kernel/locking/rwsem.o
  LD      kernel/bpf/built-in.o
  CC      kernel/time/test_udelay.o
  CC      kernel/locking/percpu-rwsem.o
  CC      kernel/locking/lockdep.o
  CC      kernel/locking/mutex-debug.o
  CC      kernel/locking/lockdep_proc.o
  CC      kernel/locking/spinlock.o
  CC      kernel/locking/rtmutex.o
  CC      kernel/locking/spinlock_debug.o
  CC      kernel/locking/rwsem-xadd.o
  LD      kernel/power/built-in.o
  LD      kernel/printk/built-in.o
  LD      kernel/irq/built-in.o
  LD      kernel/time/built-in.o
  LD      kernel/sched/built-in.o
  LD      kernel/rcu/built-in.o
  LD      kernel/locking/built-in.o
/home/kisskb/slave/src/kernel/cgroup.c: In function 'cgroup_mount':
/home/kisskb/slave/src/include/linux/cgroup.h:354:11: warning: 'root' may be used uninitialized in this function [-Wuninitialized]
/home/kisskb/slave/src/kernel/cgroup.c:2081:22: note: 'root' was declared here
  LD      kernel/built-in.o
make[1]: *** wait: No child processes.  Stop.
Makefile:150: recipe for target 'sub-make' failed
make: *** [sub-make] Error 2
Command 'make -j 48 ARCH=powerpc O=/home/kisskb/slave/build/powerpc-next_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-next_powerpc-randconfig_powerpc
# Build took: 0:00:11.748228