# git rev-parse -q --verify 841e77fee6c17e50bbcda1dc39ff2acfdfbe2bc9^{commit}
841e77fee6c17e50bbcda1dc39ff2acfdfbe2bc9
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# git checkout -q -f -B kisskb 841e77fee6c17e50bbcda1dc39ff2acfdfbe2bc9
# git clean -qxdf
# git log -1
commit 841e77fee6c17e50bbcda1dc39ff2acfdfbe2bc9
Author: Oliver O'Halloran <oohall@gmail.com>
Date:   Thu Oct 19 18:13:55 2017 +1100

    powerpc/lib: Implement UACCESS_FLUSHCACHE API
    
    Implement the architecture specific portitions of the UACCESS_FLUSHCACHE
    API. This provides functions for the copy_user_flushcache iterator that
    ensure that when the copy is finished the destination buffer contains
    a copy of the original and that the destination buffer is clean in the
    processor caches.
    
    Signed-off-by: Oliver O'Halloran <oohall@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 841e77fee6c17e50bbcda1dc39ff2acfdfbe2bc9
# < make -j 48 ARCH=powerpc O=/home/kisskb/slave/build/powerpc-next_powerpc-allnoconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  allnoconfig
# make -j 48 ARCH=powerpc O=/home/kisskb/slave/build/powerpc-next_powerpc-allnoconfig_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-allnoconfig_powerpc'
  GEN     ./Makefile
scripts/kconfig/conf  --silentoldconfig Kconfig
  CHK     include/config/kernel.release
  GEN     ./Makefile
  WRAP    arch/powerpc/include/generated/uapi/asm/statfs.h
  WRAP    arch/powerpc/include/generated/uapi/asm/sockios.h
  WRAP    arch/powerpc/include/generated/uapi/asm/resource.h
  WRAP    arch/powerpc/include/generated/uapi/asm/poll.h
  WRAP    arch/powerpc/include/generated/uapi/asm/param.h
  CHK     include/generated/uapi/linux/version.h
  UPD     include/generated/uapi/linux/version.h
  UPD     include/config/kernel.release
  Using /home/kisskb/slave/src as source for kernel
  WRAP    arch/powerpc/include/generated/asm/clkdev.h
  WRAP    arch/powerpc/include/generated/asm/irq_regs.h
  WRAP    arch/powerpc/include/generated/asm/msi.h
  WRAP    arch/powerpc/include/generated/asm/div64.h
  WRAP    arch/powerpc/include/generated/asm/irq_work.h
  WRAP    arch/powerpc/include/generated/asm/export.h
  WRAP    arch/powerpc/include/generated/asm/local64.h
  WRAP    arch/powerpc/include/generated/asm/preempt.h
  WRAP    arch/powerpc/include/generated/asm/mcs_spinlock.h
  CHK     include/generated/utsrelease.h
  UPD     include/generated/utsrelease.h
  WRAP    arch/powerpc/include/generated/asm/rwsem.h
  WRAP    arch/powerpc/include/generated/asm/vtime.h
  HOSTCC  scripts/sortextable
  HOSTCC  scripts/dtc/livetree.o
  HOSTCC  scripts/dtc/treesource.o
  CC      scripts/mod/devicetable-offsets.s
  HOSTCC  scripts/dtc/dtc.o
  CC      scripts/mod/empty.o
  HOSTCC  scripts/mod/mk_elfconfig
  HOSTCC  scripts/dtc/data.o
  HOSTCC  scripts/dtc/fstree.o
  HOSTCC  scripts/dtc/flattree.o
  HOSTCC  scripts/dtc/srcpos.o
  HOSTCC  scripts/dtc/checks.o
  SHIPPED scripts/dtc/dtc-parser.tab.c
  SHIPPED scripts/dtc/dtc-parser.tab.h
  SHIPPED scripts/dtc/dtc-lexer.lex.c
  HOSTCC  scripts/dtc/util.o
  HOSTCC  scripts/dtc/dtc-lexer.lex.o
  HOSTCC  scripts/dtc/dtc-parser.tab.o
  CHK     scripts/mod/devicetable-offsets.h
  UPD     scripts/mod/devicetable-offsets.h
  MKELF   scripts/mod/elfconfig.h
  HOSTCC  scripts/mod/sumversion.o
  HOSTCC  scripts/mod/file2alias.o
  HOSTCC  scripts/mod/modpost.o
  HOSTLD  scripts/dtc/dtc
  HOSTLD  scripts/mod/modpost
  CC      kernel/bounds.s
  CHK     include/generated/timeconst.h
  UPD     include/generated/timeconst.h
  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
  CC      init/main.o
  CHK     include/generated/compile.h
  CC      init/do_mounts.o
  CC      init/noinitramfs.o
  CC      init/init_task.o
  AR      usr/built-in.o
  UPD     include/generated/compile.h
  CC      init/version.o
  AR      arch/powerpc/sysdev/built-in.o
  CC      arch/powerpc/mm/pgtable.o
  CC      arch/powerpc/mm/mem.o
  CC      arch/powerpc/mm/fault.o
  CC      arch/powerpc/mm/pgtable_32.o
  CC      arch/powerpc/mm/init_32.o
  CC      arch/powerpc/mm/mmap.o
  CC      arch/powerpc/mm/ppc_mmu_32.o
  AS      arch/powerpc/mm/hash_low_32.o
  CC      arch/powerpc/mm/mmu_context_hash32.o
  CC      arch/powerpc/mm/tlb_hash32.o
  CC      arch/powerpc/mm/mmu_context.o
  CC      arch/powerpc/mm/init-common.o
  CC      arch/powerpc/mm/hugetlbpage.o
  AR      arch/powerpc/platforms/built-in.o
  CC      arch/powerpc/lib/feature-fixups.o
  CC      arch/powerpc/lib/code-patching.o
  AS      arch/powerpc/lib/copy_32.o
  AS      arch/powerpc/lib/div64.o
  AS      arch/powerpc/lib/crtsavres.o
  CC      arch/powerpc/lib/alloc.o
  AS      arch/powerpc/lib/quad.o
  AS      arch/powerpc/lib/checksum_32.o
  CC      arch/powerpc/lib/checksum_wrappers.o
  AS      arch/powerpc/lib/ldstfp.o
  AS      arch/powerpc/lib/string.o
  CC      arch/powerpc/lib/sstep.o
  AR      arch/powerpc/math-emu/built-in.o
  CC      arch/powerpc/kernel/ptrace.o
  CC      arch/powerpc/kernel/cputable.o
  CC      arch/powerpc/kernel/syscalls.o
  CC      arch/powerpc/kernel/irq.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/idle.o
  CPP     arch/powerpc/kernel/systbl_chk.i
  CC      arch/powerpc/kernel/process.o
  CC      arch/powerpc/kernel/signal.o
  CC      arch/powerpc/kernel/sysfs.o
  CC      arch/powerpc/kernel/cacheinfo.o
  CC      arch/powerpc/kernel/setup-common.o
  CC      arch/powerpc/kernel/prom.o
  CC      arch/powerpc/kernel/traps.o
  CC      arch/powerpc/kernel/time.o
  CC      arch/powerpc/kernel/udbg.o
  CC      arch/powerpc/kernel/dma.o
  CC      arch/powerpc/kernel/io.o
  AS      arch/powerpc/kernel/misc.o
  CC      arch/powerpc/kernel/of_platform.o
  CC      arch/powerpc/kernel/prom_parse.o
  AS      arch/powerpc/kernel/misc_32.o
  AR      arch/powerpc/crypto/built-in.o
  AR      arch/powerpc/kernel/trace/built-in.o
  AR      arch/powerpc/net/built-in.o
  AS      arch/powerpc/kernel/idle_6xx.o
  AS      arch/powerpc/kernel/cpu_setup_6xx.o
  AS      arch/powerpc/kernel/l2cr_6xx.o
  AS      arch/powerpc/kernel/entry_32.o
  CC      arch/powerpc/kernel/setup_32.o
  LDS     arch/powerpc/kernel/vdso32/vdso32.lds
  CC      arch/powerpc/kernel/pci_32.o
  AR      certs/built-in.o
  CC      arch/powerpc/kernel/pci-common.o
  VDSO32A arch/powerpc/kernel/vdso32/sigtramp.o
  CC      arch/powerpc/kernel/pci_of_scan.o
  CC      arch/powerpc/kernel/iomap.o
  VDSO32A arch/powerpc/kernel/vdso32/gettimeofday.o
  VDSO32A arch/powerpc/kernel/vdso32/datapage.o
/home/kisskb/slave/src/arch/powerpc/lib/sstep.c: In function 'emulate_loadstore':
/home/kisskb/slave/src/arch/powerpc/lib/sstep.c:2789:5: error: implicit declaration of function 'byterev_8' [-Werror=implicit-function-declaration]
cc1: all warnings being treated as errors
/home/kisskb/slave/src/scripts/Makefile.build:311: recipe for target 'arch/powerpc/lib/sstep.o' failed
make[2]: *** [arch/powerpc/lib/sstep.o] Error 1
make[2]: *** Waiting for unfinished jobs....
  VDSO32A arch/powerpc/kernel/vdso32/note.o
  VDSO32A arch/powerpc/kernel/vdso32/cacheflush.o
  AS      arch/powerpc/kernel/ppc_save_regs.o
  AS      arch/powerpc/kernel/head_32.o
  LDS     arch/powerpc/kernel/vmlinux.lds
  AS      arch/powerpc/kernel/fpu.o
  VDSO32L arch/powerpc/kernel/vdso32/vdso32.so.dbg
  CALL    /home/kisskb/slave/src/arch/powerpc/kernel/systbl_chk.sh
  OBJCOPY arch/powerpc/kernel/vdso32/vdso32.so
  AS      arch/powerpc/kernel/systbl.o
  AS      arch/powerpc/kernel/vdso32/vdso32_wrapper.o
  AR      ipc/built-in.o
  AR      arch/powerpc/kernel/vdso32/built-in.o
  AR      init/mounts.o
  CC      security/commoncap.o
  CC      security/min_addr.o
  AR      init/built-in.o
  CC      kernel/fork.o
  CC      kernel/exec_domain.o
  CC      mm/oom_kill.o
  CC      mm/filemap.o
  CC      mm/mempool.o
  CC      kernel/exit.o
  CC      kernel/panic.o
  CC      mm/maccess.o
  CC      mm/page_alloc.o
  CC      kernel/cpu.o
  CC      kernel/softirq.o
  CC      kernel/resource.o
  CC      kernel/sysctl.o
  CC      mm/swap.o
  CC      mm/readahead.o
  CC      mm/page-writeback.o
  AR      block/built-in.o
/home/kisskb/slave/src/Makefile:1019: recipe for target 'arch/powerpc/lib' failed
make[1]: *** [arch/powerpc/lib] Error 2
make[1]: *** Waiting for unfinished jobs....
  CC      mm/truncate.o
  CC      mm/vmscan.o
  CC      kernel/sysctl_binary.o
  CC      kernel/capability.o
  CC      fs/read_write.o
  CC      fs/open.o
  AR      crypto/built-in.o
  CC      fs/file_table.o
  CC      mm/shmem.o
  CC      fs/super.o
  CC      mm/util.o
  CC      fs/char_dev.o
  CC      mm/mmzone.o
  AR      arch/powerpc/mm/built-in.o
  CC      mm/vmstat.o
  CC      kernel/ptrace.o
  CC      mm/backing-dev.o
  CC      kernel/user.o
  CC      kernel/signal.o
  CC      fs/stat.o
  CC      kernel/sys.o
  CC      fs/exec.o
  CC      kernel/umh.o
  CC      fs/pipe.o
  CC      kernel/workqueue.o
  CC      mm/mm_init.o
  CC      kernel/pid.o
  CC      mm/mmu_context.o
  CC      mm/percpu.o
  CC      fs/namei.o
  CC      mm/slab_common.o
  CC      fs/fcntl.o
  CC      mm/compaction.o
  CC      kernel/task_work.o
  CC      mm/vmacache.o
  CC      kernel/extable.o
  AR      security/built-in.o
  CC      mm/swap_slots.o
  CC      kernel/params.o
  CC      kernel/kthread.o
  CC      kernel/sys_ni.o
  CC      mm/interval_tree.o
  CC      fs/ioctl.o
  CC      kernel/nsproxy.o
  CC      kernel/notifier.o
  CC      mm/list_lru.o
  CC      kernel/ksysfs.o
  CC      mm/workingset.o
  CC      mm/debug.o
  CC      kernel/cred.o
  CC      kernel/reboot.o
  CC      kernel/async.o
  CC      mm/gup.o
  CC      mm/highmem.o
  CC      mm/memory.o
  CC      kernel/range.o
  CC      fs/readdir.o
  CC      kernel/smpboot.o
  CC      fs/select.o
  AR      arch/powerpc/kernel/built-in.o
  CC      mm/mincore.o
  CC      kernel/ucount.o
  CC      mm/mlock.o
  AR      kernel/livepatch/built-in.o
  CC      kernel/locking/mutex.o
  CC      kernel/irq/irqdesc.o
  CC      kernel/power/qos.o
  CC      mm/mmap.o
  CC      kernel/printk/printk.o
  CC      mm/mremap.o
  CC      mm/mprotect.o
  CC      mm/msync.o
  CC      fs/dcache.o
  CC      kernel/rcu/update.o
  CC      mm/page_vma_mapped.o
  CC      kernel/sched/core.o
  CC      mm/pagewalk.o
  CC      kernel/dma.o
  CC      mm/pgtable-generic.o
  CC      kernel/up.o
  CC      mm/rmap.o
  CC      kernel/elfcore.o
  CC      kernel/time/time.o
  CC      kernel/memremap.o
  CC      fs/inode.o
  CC      fs/attr.o
  CC      mm/vmalloc.o
  CC      mm/init-mm.o
  CC      mm/nobootmem.o
  CC      mm/memblock.o
  CC      mm/dmapool.o
  CC      fs/bad_inode.o
  CC      mm/slub.o
  CC      fs/file.o
  AR      kernel/power/built-in.o
  CC      fs/filesystems.o
  CC      kernel/time/timer.o
  CC      kernel/time/hrtimer.o
  CC      fs/namespace.o
  CC      fs/seq_file.o
  CC      fs/xattr.o
  CC      kernel/time/timekeeping.o
  CC      fs/libfs.o
/home/kisskb/slave/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/home/kisskb/slave/src/kernel/printk/printk.c:186:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
  CC      kernel/rcu/sync.o
  CC      kernel/rcu/tiny.o
  CC      kernel/irq/handle.o
  CC      kernel/irq/manage.o
  CC      kernel/irq/spurious.o
  CC      kernel/locking/semaphore.o
  CC      kernel/irq/resend.o
  CC      fs/fs-writeback.o
  CC      kernel/locking/rwsem.o
  CC      kernel/locking/rwsem-xadd.o
  CC      kernel/locking/percpu-rwsem.o
  CC      fs/pnode.o
  CC      fs/splice.o
  CC      kernel/irq/chip.o
  CC      fs/sync.o
  AR      kernel/printk/built-in.o
  CC      kernel/irq/dummychip.o
  CC      fs/utimes.o
  CC      fs/stack.o
  CC      fs/fs_struct.o
  CC      fs/statfs.o
  CC      kernel/irq/devres.o
  CC      kernel/sched/loadavg.o
  CC      kernel/irq/irqdomain.o
  CC      fs/fs_pin.o
  CC      fs/nsfs.o
  CC      kernel/time/ntp.o
  CC      fs/no-block.o
  CC      kernel/sched/clock.o
  AR      fs/devpts/built-in.o
  CC      kernel/sched/cputime.o
  AR      fs/exofs/built-in.o
  CC      kernel/time/clocksource.o
  AR      fs/quota/built-in.o
  CC      fs/ramfs/inode.o
  CC      fs/binfmt_elf.o
  AR      kernel/rcu/built-in.o
  AR      fs/notify/dnotify/built-in.o
  AR      fs/notify/fanotify/built-in.o
  CC      fs/ramfs/file-mmu.o
  AR      kernel/locking/built-in.o
  AR      fs/notify/inotify/built-in.o
  CC      kernel/sched/idle_task.o
  CC      kernel/time/jiffies.o
  CC      kernel/sched/fair.o
  CC      kernel/time/timer_list.o
  AR      fs/notify/built-in.o
  CC      kernel/time/timeconv.o
  CC      kernel/sched/rt.o
  CC      kernel/sched/deadline.o
  CC      kernel/time/timecounter.o
  CC      kernel/time/alarmtimer.o
  CC      kernel/time/posix-stubs.o
  CC      kernel/sched/wait.o
  CC      kernel/sched/wait_bit.o
  CC      kernel/time/clockevents.o
  CC      kernel/sched/swait.o
  CC      kernel/time/tick-common.o
  CC      kernel/sched/completion.o
  CC      kernel/sched/idle.o
  AR      fs/ramfs/ramfs.o
  AR      fs/ramfs/built-in.o
  AR      kernel/irq/built-in.o
  AR      mm/built-in.o
  AR      kernel/sched/built-in.o
  AR      kernel/time/built-in.o
  AR      kernel/built-in.o
  AR      fs/built-in.o
make[1]: *** wait: No child processes.  Stop.
Makefile:145: 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-allnoconfig_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-allnoconfig_powerpc
# Build took: 0:00:25.065735