# < git ls-remote /scratch/git/linus.git refs/heads/master
# < git rev-parse tmp/linus
remote == local, skipping fetch
# < git rev-parse tmp/linus
Upstream revision is e12ca23d41bd157354a5d1aadff30211a410c53a
Head not built, building
# < git reset --mixed
# git branch -D linus
Deleted branch linus (was e12ca23).
# git checkout -q -f -b linus tmp/linus
# < git ls-files --others --modified
# git ls-files --others --modified
cmd.log
# < /scratch/kisskb/prod/kisskb/kisskb3/backend/makewrap.py ARCH=sh O=/scratch/kisskb/prod/kisskb/kisskb3/backend/build/linus_shmin_defconfig_sh4 CROSS_COMPILE=/opt/crosstool/gcc-4.3.2-nolibc/bin/sh4-linux-  -f kisskb-version.mk
makewrap: Added ccache to CROSS_COMPILE
makewrap: Using -j factor 32
# < /scratch/kisskb/prod/kisskb/kisskb3/backend/makewrap.py ARCH=sh O=/scratch/kisskb/prod/kisskb/kisskb3/backend/build/linus_shmin_defconfig_sh4 CROSS_COMPILE=/opt/crosstool/gcc-4.3.2-nolibc/bin/sh4-linux-  shmin_defconfig
makewrap: Added ccache to CROSS_COMPILE
makewrap: Using -j factor 32
# /scratch/kisskb/prod/kisskb/kisskb3/backend/makewrap.py ARCH=sh O=/scratch/kisskb/prod/kisskb/kisskb3/backend/build/linus_shmin_defconfig_sh4 CROSS_COMPILE=/opt/crosstool/gcc-4.3.2-nolibc/bin/sh4-linux-  
makewrap: Added ccache to CROSS_COMPILE
makewrap: Using -j factor 32
  GEN     /scratch/kisskb/build/linus_shmin_defconfig_sh4/Makefile
scripts/kconfig/conf --silentoldconfig Kconfig
  GEN     /scratch/kisskb/build/linus_shmin_defconfig_sh4/Makefile
make[2]: Nothing to be done for `all'.
  CHK     include/linux/version.h
  UPD     include/linux/version.h
  CC      scripts/mod/empty.o
  HOSTCC  scripts/mod/mk_elfconfig
  MKELF   scripts/mod/elfconfig.h
  HOSTCC  scripts/mod/file2alias.o
  HOSTCC  scripts/mod/modpost.o
  HOSTCC  scripts/mod/sumversion.o
  HOSTLD  scripts/mod/modpost
  Using /scratch/kisskb/src as source for kernel
  CHK     include/generated/utsrelease.h
  UPD     include/generated/utsrelease.h
  Generating include/generated/machtypes.h
  CC      kernel/bounds.s
  GEN     include/generated/bounds.h
  CC      arch/sh/kernel/asm-offsets.s
In file included from /scratch/kisskb/src/include/linux/sched.h:68,
                 from /scratch/kisskb/src/include/linux/cgroup.h:11,
                 from /scratch/kisskb/src/include/linux/memcontrol.h:22,
                 from /scratch/kisskb/src/include/linux/swap.h:8,
                 from /scratch/kisskb/src/include/linux/suspend.h:4,
                 from /scratch/kisskb/src/arch/sh/kernel/asm-offsets.c:15:
/scratch/kisskb/src/arch/sh/include/asm/ptrace.h: In function 'profile_pc':
/scratch/kisskb/src/arch/sh/include/asm/ptrace.h:134: error: implicit declaration of function 'instruction_pointer'
In file included from /scratch/kisskb/src/arch/sh/include/asm/ptrace.h:143,
                 from /scratch/kisskb/src/include/linux/sched.h:68,
                 from /scratch/kisskb/src/include/linux/cgroup.h:11,
                 from /scratch/kisskb/src/include/linux/memcontrol.h:22,
                 from /scratch/kisskb/src/include/linux/swap.h:8,
                 from /scratch/kisskb/src/include/linux/suspend.h:4,
                 from /scratch/kisskb/src/arch/sh/kernel/asm-offsets.c:15:
/scratch/kisskb/src/include/asm-generic/ptrace.h: At top level:
/scratch/kisskb/src/include/asm-generic/ptrace.h:22: error: conflicting types for 'instruction_pointer'
/scratch/kisskb/src/arch/sh/include/asm/ptrace.h:134: error: previous implicit declaration of 'instruction_pointer' was here
/scratch/kisskb/src/include/asm-generic/ptrace.h: In function 'frame_pointer':
/scratch/kisskb/src/include/asm-generic/ptrace.h:64: error: 'struct pt_regs' has no member named 'fp'
/scratch/kisskb/src/include/asm-generic/ptrace.h: In function 'frame_pointer_set':
/scratch/kisskb/src/include/asm-generic/ptrace.h:69: error: 'struct pt_regs' has no member named 'fp'
make[2]: *** [arch/sh/kernel/asm-offsets.s] Error 1
make[1]: *** [prepare0] Error 2
make: *** [sub-make] Error 2
make failed, trying to bisect ..
## bisect start
Last known good revision 3c0eee3fe6a3a1c745379547c7e7c904aa64f6d5
# < git symbolic-ref HEAD
# < git merge-base 3c0eee3fe6a3a1c745379547c7e7c904aa64f6d5 e12ca23d41bd157354a5d1aadff30211a410c53a

# < git ls-files --others --modified
# git ls-files --others --modified
cmd.log
# git bisect reset linus
Already on 'linus'
# git bisect start
# git bisect bad
# git bisect good 3c0eee3fe6a3a1c745379547c7e7c904aa64f6d5
Bisecting: 14590 revisions left to test after this (roughly 14 steps)
[5601d05b8c340ee2643febc146099325eff187eb] KVM: emulator: Fix io permission checking for 64bit guest
Trying e12ca23d41bd157354a5d1aadff30211a410c53a

# < /scratch/kisskb/prod/kisskb/kisskb3/backend/makewrap.py ARCH=sh O=/scratch/kisskb/prod/kisskb/kisskb3/backend/build/linus_shmin_defconfig_sh4 CROSS_COMPILE=/opt/crosstool/gcc-4.3.2-nolibc/bin/sh4-linux-  shmin_defconfig
makewrap: Added ccache to CROSS_COMPILE
makewrap: Using -j factor 32
# /scratch/kisskb/prod/kisskb/kisskb3/backend/makewrap.py ARCH=sh O=/scratch/kisskb/prod/kisskb/kisskb3/backend/build/linus_shmin_defconfig_sh4 CROSS_COMPILE=/opt/crosstool/gcc-4.3.2-nolibc/bin/sh4-linux-  
makewrap: Added ccache to CROSS_COMPILE
makewrap: Using -j factor 32
  GEN     /scratch/kisskb/build/linus_shmin_defconfig_sh4/Makefile
scripts/kconfig/conf --silentoldconfig Kconfig
  GEN     /scratch/kisskb/build/linus_shmin_defconfig_sh4/Makefile
  CHK     include/linux/version.h
  UPD     include/linux/version.h
  CC      scripts/mod/empty.o
  MKELF   scripts/mod/elfconfig.h
  HOSTCC  scripts/mod/file2alias.o
  HOSTCC  scripts/mod/modpost.o
  HOSTCC  scripts/mod/sumversion.o
  HOSTLD  scripts/mod/modpost
  Using /scratch/kisskb/src as source for kernel
  CHK     include/generated/utsrelease.h
  UPD     include/generated/utsrelease.h
make[2]: `include/generated/machtypes.h' is up to date.
  CC      kernel/bounds.s
  GEN     include/generated/bounds.h
  CC      arch/sh/kernel/asm-offsets.s
  GEN     include/generated/asm-offsets.h
  CALL    /scratch/kisskb/src/scripts/checksyscalls.sh
<stdin>:1538:2: warning: #warning syscall name_to_handle_at not implemented
<stdin>:1542:2: warning: #warning syscall open_by_handle_at not implemented
<stdin>:1546:2: warning: #warning syscall clock_adjtime not implemented
  CHK     include/generated/compile.h
  CC      init/main.o
  LD      usr/built-in.o
  CC      init/do_mounts.o
  CC      init/noinitramfs.o
  AS      arch/sh/kernel/debugtraps.o
  CC      arch/sh/mm/alignment.o
  CC      arch/sh/kernel/dma-nommu.o
  CC      arch/sh/mm/cache.o
  CC      arch/sh/kernel/dumpstack.o
  CC      arch/sh/mm/init.o
  CC      arch/sh/boards/board-shmin.o
  CC      arch/sh/kernel/idle.o
  CC      arch/sh/mm/consistent.o
  CC      arch/sh/kernel/io.o
  CC      arch/sh/kernel/irq.o
  UPD     include/generated/compile.h
  CC      arch/sh/kernel/irq_32.o
  CC      arch/sh/mm/mmap.o
  CC      arch/sh/kernel/kdebugfs.o
  CC      kernel/sched.o
  CC      arch/sh/kernel/machvec.o
  CC      init/version.o
  CC      mm/filemap.o
  CC      arch/sh/mm/cache-sh3.o
  CC      arch/sh/kernel/nmi_debug.o
  CC      mm/mempool.o
  CC      kernel/fork.o
  CC      arch/sh/mm/extable_32.o
  CC      arch/sh/kernel/process.o
  CC      kernel/exec_domain.o
  CC      mm/oom_kill.o
  CC      arch/sh/mm/fault_32.o
  LD      ipc/built-in.o
  CC      security/commoncap.o
  CC      fs/open.o
  CC      crypto/api.o
/scratch/kisskb/src/arch/sh/boards/board-shmin.c: In function 'shmin_setup':
/scratch/kisskb/src/arch/sh/boards/board-shmin.c:27: error: implicit declaration of function '__set_io_port_base'
make[2]: *** [arch/sh/boards/board-shmin.o] Error 1
make[1]: *** [arch/sh/boards] Error 2
make[1]: *** Waiting for unfinished jobs....
  CC      arch/sh/kernel/process_32.o
  CC      kernel/panic.o
  CC      arch/sh/kernel/ptrace.o
  CC      arch/sh/kernel/ptrace_32.o
  CC      security/min_addr.o
  CC      arch/sh/kernel/reboot.o
  CC      arch/sh/kernel/return_address.o
  CC      arch/sh/kernel/setup.o
  CC      arch/sh/mm/gup.o
  CC      arch/sh/kernel/signal_32.o
  CC      mm/fadvise.o
  CC      fs/read_write.o
  CC      mm/maccess.o
  CC      arch/sh/mm/ioremap.o
  CC      mm/page_alloc.o
  CC      fs/file_table.o
  CC      arch/sh/kernel/sys_sh.o
  CC      arch/sh/mm/kmap.o
  CC      fs/super.o
  CC      arch/sh/kernel/sys_sh32.o
  CC      arch/sh/mm/pgtable.o
  CC      mm/page-writeback.o
  CC      arch/sh/mm/tlbflush_32.o
  AS      arch/sh/kernel/syscalls_32.o
  CC      arch/sh/kernel/time.o
  CC      fs/char_dev.o
  CC      arch/sh/kernel/topology.o
  CC      arch/sh/mm/tlb-sh3.o
  CC      arch/sh/kernel/traps.o
  CC      mm/readahead.o
  CC      mm/swap.o
  CC      arch/sh/mm/uncached.o
  CC      mm/truncate.o
  CC      fs/stat.o
  CC      crypto/cipher.o
  CC      mm/vmscan.o
  CC      kernel/printk.o
  CC      fs/exec.o
  CC      crypto/compress.o
  CC      arch/sh/kernel/traps_32.o
  CC      crypto/algapi.o
  CC      kernel/cpu.o
  CC      arch/sh/kernel/unwinder.o
  LD      security/built-in.o
  CC      arch/sh/kernel/iomap.o
  LD      init/mounts.o
  LD      init/built-in.o
  CC      kernel/exit.o
  CC      mm/shmem.o
  CC      mm/prio_tree.o
  CC      arch/sh/kernel/cpu/irq/imask.o
  CC      arch/sh/kernel/vsyscall/vsyscall.o
  AS      arch/sh/kernel/cpu/sh3/ex.o
  CC      arch/sh/kernel/sh_bios.o
  CC      arch/sh/kernel/cpu/sh3/probe.o
  CC      fs/pipe.o
  CC      kernel/itimer.o
  LD      arch/sh/mm/built-in.o
  TIMEC   kernel/timeconst.h
  CC      kernel/softirq.o
  CC      arch/sh/kernel/cpu/irq/ipr.o
  CC      kernel/resource.o
  CC      crypto/scatterwalk.o
  CC      mm/util.o
  CC      crypto/proc.o
  AS      arch/sh/kernel/cpu/sh3/entry.o
  CC      arch/sh/kernel/perf_event.o
  CC      mm/mmzone.o
  CC      arch/sh/kernel/cpu/sh3/setup-sh3.o
  LDS     arch/sh/kernel/vsyscall/vsyscall.lds
  CC      arch/sh/kernel/cpu/clock-cpg.o
  CC      arch/sh/kernel/cpu/init.o
  CC      fs/namei.o
  AS      arch/sh/kernel/vsyscall/vsyscall-trapa.o
  AS      arch/sh/kernel/vsyscall/vsyscall-note.o
  CC      arch/sh/kernel/cpu/clock.o
  LD      arch/sh/kernel/cpu/irq/built-in.o
  CC      arch/sh/kernel/perf_callchain.o
  CC      arch/sh/kernel/cpu/sh3/setup-sh770x.o
  CC      mm/vmstat.o
  CC      mm/backing-dev.o
  CC      arch/sh/kernel/cpu/sh3/clock-sh7706.o
  CC      mm/page_isolation.o
  CC      fs/fcntl.o
/scratch/kisskb/src/kernel/sched.c: In function 'pick_next_task':
/scratch/kisskb/src/kernel/sched.c:4069: warning: control reaches end of non-void function
  SYSCALL arch/sh/kernel/vsyscall/vsyscall-trapa.so
  CC      mm/mm_init.o
  SYSCALL arch/sh/kernel/vsyscall/vsyscall-syms.o
  AS      arch/sh/kernel/vsyscall/vsyscall-syscall.o
  CC      mm/mmu_context.o
  LD      arch/sh/kernel/vsyscall/built-in.o
  CC      arch/sh/kernel/hw_breakpoint.o
  AS      arch/sh/kernel/head_32.o
/scratch/kisskb/src/arch/sh/kernel/cpu/clock-cpg.c: In function 'cpg_clk_init':
/scratch/kisskb/src/arch/sh/kernel/cpu/clock-cpg.c:54: warning: 'arch_init_clk_ops' is deprecated (declared at /scratch/kisskb/src/arch/sh/include/asm/clock.h:7)
/scratch/kisskb/src/arch/sh/kernel/cpu/clock-cpg.c: In function 'arch_clk_init':
/scratch/kisskb/src/arch/sh/kernel/cpu/clock-cpg.c:75: warning: 'cpg_clk_init' is deprecated (declared at /scratch/kisskb/src/arch/sh/kernel/cpu/clock-cpg.c:49)
  CC      arch/sh/kernel/init_task.o
  CC      kernel/sysctl.o
  LDS     arch/sh/kernel/vmlinux.lds
  CC      arch/sh/kernel/cpu/hwblk.o
  CC      kernel/sysctl_binary.o
  CC      crypto/ablkcipher.o
  CC      kernel/capability.o
  CC      crypto/blkcipher.o
  CC      crypto/ahash.o
  CC      kernel/ptrace.o
  CC      mm/percpu.o
  CC      crypto/shash.o
  CC      crypto/algboss.o
  CC      kernel/timer.o
  CC      mm/fremap.o
  CC      kernel/user.o
  CC      arch/sh/kernel/cpu/proc.o
  LD      arch/sh/kernel/cpu/sh3/built-in.o
  CC      mm/highmem.o
  CC      crypto/testmgr.o
  CC      crypto/crypto_wq.o
  CC      kernel/signal.o
  CC      fs/ioctl.o
  CC      mm/madvise.o
  CC      mm/memory.o
  CC      mm/mincore.o
  CC      kernel/sys.o
  LD      arch/sh/kernel/cpu/built-in.o
  CC      kernel/kmod.o
  CC      kernel/workqueue.o
  CC      crypto/aead.o
  CC      mm/mlock.o
  CC      crypto/chainiv.o
  CC      mm/mmap.o
  CC      crypto/eseqiv.o
  CC      crypto/pcompress.o
  CC      kernel/pid.o
  LD      arch/sh/kernel/built-in.o
  CC      mm/mprotect.o
  CC      kernel/rcupdate.o
  CC      kernel/extable.o
  CC      mm/mremap.o
  CC      mm/msync.o
  CC      fs/readdir.o
  CC      crypto/md5.o
  CC      mm/rmap.o
  CC      mm/vmalloc.o
  CC      kernel/params.o
  CC      mm/pagewalk.o
  CC      mm/pgtable-generic.o
  CC      kernel/posix-timers.o
  CC      fs/select.o
  CC      mm/init-mm.o
  CC      crypto/cbc.o
  CC      crypto/des_generic.o
  CC      crypto/rng.o
  CC      mm/bootmem.o
  CC      kernel/kthread.o
  CC      crypto/krng.o
  CC      mm/memblock.o
  CC      mm/dmapool.o
  LD      crypto/crypto.o
  LD      crypto/crypto_algapi.o
  CC      mm/slob.o
  LD      crypto/crypto_blkcipher.o
  LD      crypto/crypto_hash.o
  LD      crypto/cryptomgr.o
  CC      fs/fifo.o
  CC      fs/dcache.o
  CC      mm/quicklist.o
  CC      kernel/wait.o
  CC      fs/inode.o
  CC      fs/attr.o
  CC      kernel/kfifo.o
  CC      fs/bad_inode.o
  CC      kernel/sys_ni.o
  CC      fs/file.o
  CC      fs/filesystems.o
  CC      kernel/posix-cpu-timers.o
  CC      fs/namespace.o
  CC      kernel/mutex.o
  CC      kernel/hrtimer.o
  CC      kernel/rwsem.o
  CC      kernel/nsproxy.o
  CC      fs/seq_file.o
  CC      kernel/srcu.o
/scratch/kisskb/src/mm/bootmem.c: In function 'mark_bootmem':
/scratch/kisskb/src/mm/bootmem.c:362: warning: control reaches end of non-void function
  CC      kernel/semaphore.o
  CC      fs/xattr.o
/scratch/kisskb/src/mm/slob.c: In function '__kmalloc_node':
/scratch/kisskb/src/mm/slob.c:482: warning: comparison of distinct pointer types lacks a cast
/scratch/kisskb/src/mm/slob.c: In function 'kfree':
/scratch/kisskb/src/mm/slob.c:533: warning: comparison of distinct pointer types lacks a cast
/scratch/kisskb/src/mm/slob.c: In function 'ksize':
/scratch/kisskb/src/mm/slob.c:552: warning: comparison of distinct pointer types lacks a cast
  CC      fs/libfs.o
  CC      kernel/notifier.o
  CC      kernel/ksysfs.o
  CC      fs/fs-writeback.o
  CC      fs/pnode.o
  CC      kernel/pm_qos_params.o
  CC      fs/drop_caches.o
  CC      kernel/sched_clock.o
  CC      fs/splice.o
  CC      kernel/cred.o
  CC      kernel/async.o
  CC      kernel/range.o
  CC      fs/sync.o
  CC      kernel/jump_label.o
  CC      fs/utimes.o
  CC      kernel/groups.o
  CC      kernel/irq/irqdesc.o
  CC      kernel/time/timekeeping.o
  CC      fs/stack.o
  CC      kernel/up.o
  CC      kernel/rcutiny.o
  CC      kernel/time/ntp.o
  CC      kernel/utsname_sysctl.o
  CC      kernel/time/clocksource.o
  CC      fs/fs_struct.o
  CC      kernel/elfcore.o
  CC      kernel/irq_work.o
  CC      kernel/time/jiffies.o
  CC      kernel/perf_event.o
/scratch/kisskb/src/kernel/pm_qos_params.c: In function 'pm_qos_get_value':
/scratch/kisskb/src/kernel/pm_qos_params.c:136: warning: control reaches end of non-void function
  CC      kernel/hw_breakpoint.o
  CC      fs/statfs.o
  CC      fs/buffer.o
  CC      kernel/time.o
  CC      kernel/time/timer_list.o
  CC      kernel/irq/handle.o
  LD      crypto/built-in.o
  CC      fs/bio.o
  CC      kernel/irq/manage.o
  CC      fs/block_dev.o
  CC      fs/direct-io.o
  CC      kernel/irq/spurious.o
  CC      fs/mpage.o
  CC      fs/ioprio.o
  CC      kernel/time/timecompare.o
  CC      fs/cramfs/inode.o
  CC      kernel/time/timeconv.o
  CC      fs/devpts/inode.o
  CC      kernel/irq/resend.o
  CC      fs/lockd/clntlock.o
  CC      kernel/irq/chip.o
  CC      fs/lockd/clntproc.o
  LD      mm/built-in.o
  CC      fs/lockd/clntxdr.o
  CC      fs/nfs/client.o
  CC      fs/lockd/host.o
  CC      fs/lockd/svc.o
  CC      kernel/time/posix-clock.o
  CC      fs/cramfs/uncompress.o
  CC      fs/lockd/svclock.o
  LD      fs/nfs_common/built-in.o
  CC      kernel/time/clockevents.o
  CC      kernel/irq/dummychip.o
  CC      kernel/time/tick-common.o
  CC      kernel/irq/devres.o
  CC      fs/partitions/check.o
  CC      fs/notify/fsnotify.o
  CC      kernel/irq/proc.o
  CC      fs/proc/mmu.o
  CC      fs/notify/notification.o
  LD      fs/devpts/devpts.o
  LD      fs/devpts/built-in.o
  CC      fs/proc/task_mmu.o
  CC      fs/notify/group.o
  CC      fs/proc/inode.o
  LD      fs/quota/built-in.o
  CC      fs/lockd/svcshare.o
  CC      fs/ramfs/inode.o
  CC      fs/partitions/msdos.o
  CC      fs/nfs/dir.o
  CC      fs/ramfs/file-mmu.o
  CC      fs/anon_inodes.o
  CC      fs/signalfd.o
  CC      fs/nfs/file.o
  CC      fs/proc/root.o
  CC      fs/notify/inode_mark.o
  CC      fs/lockd/svcproc.o
  CC      fs/nfs/getroot.o
  CC      fs/lockd/svcsubs.o
  CC      fs/notify/mark.o
  CC      fs/notify/vfsmount_mark.o
  LD      kernel/time/built-in.o
  CC      fs/timerfd.o
  LD      fs/notify/dnotify/built-in.o
  CC      fs/eventfd.o
  LD      fs/notify/fanotify/built-in.o
  CC      fs/nfs/inode.o
  CC      fs/notify/inotify/inotify_fsnotify.o
  CC      fs/lockd/mon.o
  LD      fs/cramfs/cramfs.o
  LD      fs/cramfs/built-in.o
  CC      fs/notify/inotify/inotify_user.o
  LD      fs/ramfs/ramfs.o
  CC      fs/proc/base.o
  LD      fs/ramfs/built-in.o
  CC      fs/aio.o
  LD      kernel/irq/built-in.o
  CC      fs/proc/generic.o
  CC      fs/lockd/xdr.o
  CC      fs/proc/array.o
  CC      fs/proc/proc_tty.o
  CC      fs/nfs/super.o
  CC      fs/proc/cmdline.o
  CC      fs/proc/consoles.o
  CC      fs/locks.o
  CC      fs/binfmt_script.o
  CC      fs/nfs/nfs2xdr.o
  LD      fs/partitions/built-in.o
  CC      fs/nfs/direct.o
  CC      fs/nfs/pagelist.o
  CC      fs/lockd/grace.o
  CC      fs/binfmt_elf.o
  CC      fs/proc/cpuinfo.o
  CC      fs/lockd/clnt4xdr.o
  CC      fs/proc/devices.o
  CC      fs/proc/interrupts.o
  CC      fs/proc/loadavg.o
  CC      fs/proc/meminfo.o
  CC      fs/nfs/proc.o
  CC      fs/proc/stat.o
  CC      fs/proc/uptime.o
  CC      fs/proc/version.o
  CC      fs/proc/softirqs.o
  CC      fs/proc/proc_sysctl.o
  CC      fs/lockd/xdr4.o
  CC      fs/proc/proc_net.o
  CC      fs/lockd/svc4proc.o
  CC      fs/proc/kmsg.o
  CC      fs/nfs/read.o
  CC      fs/nfs/symlink.o
  CC      fs/nfs/unlink.o
  CC      fs/proc/page.o
  LD      fs/notify/inotify/built-in.o
  CC      fs/nfs/write.o
  LD      fs/notify/built-in.o
  CC      fs/nfs/namespace.o
  CC      fs/nfs/mount_clnt.o
  CC      fs/nfs/dns_resolve.o
  CC      fs/nfs/cache_lib.o
  CC      fs/nfs/nfsroot.o
  CC      fs/nfs/nfs3proc.o
  CC      fs/nfs/nfs3xdr.o
  CC      fs/nfs/sysctl.o
  LD      fs/proc/proc.o
  LD      fs/proc/built-in.o
  LD      fs/lockd/lockd.o
  LD      fs/lockd/built-in.o
  LD      kernel/built-in.o
  LD      fs/nfs/nfs.o
  LD      fs/nfs/built-in.o
  LD      fs/built-in.o
make: *** [sub-make] Error 2
bisect failed e12ca23d41bd157354a5d1aadff30211a410c53a

# git bisect bad
Bisecting: 7296 revisions left to test after this (roughly 13 steps)
[5957e33d6aec266659a71cfabcf7cf2c593ad0d2] Merge git://git.infradead.org/battery-2.6
# < git symbolic-ref HEAD
fatal: ref HEAD is not a symbolic ref
Traceback (most recent call last):
  File "/scratch/kisskb/prod/kisskb/kisskb3/backend/backend.py", line 151, in _do_build
    self.bisect()
  File "/scratch/kisskb/prod/kisskb/kisskb3/backend/backend.py", line 228, in bisect
    current = self.current_head_revid()
  File "/scratch/kisskb/prod/kisskb/kisskb3/backend/backend.py", line 253, in current_head_revid
    ref = call_pipe('git symbolic-ref HEAD', self.log).strip()
  File "/scratch/kisskb/prod/kisskb/kisskb3/backend/utils.py", line 32, in call_pipe
    raise CommandFailedException(cmd, p.returncode)
CommandFailedException: Failed running "git symbolic-ref HEAD" (128)