# < 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 51ea8a88aae425915b458bfe295f1f10a3d52781
Head not built, building
# < git reset --mixed
# git branch -D linus
Deleted branch linus (was 51ea8a8).
# 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_sh-allnoconfig_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_sh-allnoconfig_sh4 CROSS_COMPILE=/opt/crosstool/gcc-4.3.2-nolibc/bin/sh4-linux-  allnoconfig
makewrap: Added ccache to CROSS_COMPILE
makewrap: Using -j factor 32
init/Kconfig:985:error: recursive dependency detected!
init/Kconfig:985:	symbol PERF_EVENTS is selected by HAVE_HW_BREAKPOINT
arch/Kconfig:136:	symbol HAVE_HW_BREAKPOINT depends on PERF_EVENTS
# /scratch/kisskb/prod/kisskb/kisskb3/backend/makewrap.py ARCH=sh O=/scratch/kisskb/prod/kisskb/kisskb3/backend/build/linus_sh-allnoconfig_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_sh-allnoconfig_sh4/Makefile
scripts/kconfig/conf --silentoldconfig arch/sh/Kconfig
init/Kconfig:985:error: recursive dependency detected!
init/Kconfig:985:	symbol PERF_EVENTS is selected by HAVE_HW_BREAKPOINT
arch/Kconfig:136:	symbol HAVE_HW_BREAKPOINT depends on PERF_EVENTS
  GEN     /scratch/kisskb/build/linus_sh-allnoconfig_sh4/Makefile
  CHK     include/linux/version.h
  UPD     include/linux/version.h
  CC      scripts/mod/empty.o
  HOSTCC  scripts/mod/mk_elfconfig
  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
  MKELF   scripts/mod/elfconfig.h
  GEN     include/generated/bounds.h
  HOSTCC  scripts/mod/file2alias.o
  HOSTCC  scripts/mod/modpost.o
  HOSTCC  scripts/mod/sumversion.o
  CC      arch/sh/kernel/asm-offsets.s
  GEN     include/generated/asm-offsets.h
  CALL    /scratch/kisskb/src/scripts/checksyscalls.sh
<stdin>:1526:2: warning: #warning syscall fanotify_init not implemented
<stdin>:1530:2: warning: #warning syscall fanotify_mark not implemented
<stdin>:1534:2: warning: #warning syscall prlimit64 not implemented
  HOSTLD  scripts/mod/modpost
  CHK     include/generated/compile.h
  CC      init/main.o
  LD      usr/built-in.o
  CC      init/do_mounts.o
  CC      init/noinitramfs.o
  CC      arch/sh/kernel/clkdev.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
  LD      arch/sh/boards/built-in.o
  CC      arch/sh/kernel/dumpstack.o
  CC      arch/sh/mm/init.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
  CC      arch/sh/mm/mmap.o
  CC      arch/sh/kernel/irq_32.o
  CC      arch/sh/mm/cache-sh2.o
  CC      arch/sh/kernel/machvec.o
  CC      kernel/sched.o
  CC      arch/sh/mm/nommu.o
  CC      arch/sh/kernel/nmi_debug.o
  CC      kernel/fork.o
  CC      arch/sh/mm/extable_32.o
  CC      arch/sh/kernel/process.o
  UPD     include/generated/compile.h
  CC      mm/bootmem.o
  CC      arch/sh/mm/uncached.o
  CC      kernel/exec_domain.o
  CC      arch/sh/kernel/process_32.o
  LD      ipc/built-in.o
  CC      mm/filemap.o
  CC      init/version.o
  CC      fs/open.o
  CC      arch/sh/kernel/ptrace_32.o
  CC      security/commoncap.o
/scratch/kisskb/src/arch/sh/kernel/process_32.c:299: error: conflicting types for 'sys_execve'
/scratch/kisskb/src/arch/sh/include/asm/syscalls_32.h:22: error: previous declaration of 'sys_execve' was here
make[2]: *** [arch/sh/kernel/process_32.o] Error 1
make[2]: *** Waiting for unfinished jobs....
  CC      mm/mempool.o
  CC      mm/oom_kill.o
  CC      mm/fadvise.o
  CC      mm/maccess.o
  CC      fs/read_write.o
  CC      fs/file_table.o
  CC      kernel/panic.o
  LD      crypto/built-in.o
  CC      mm/page_alloc.o
  CC      kernel/printk.o
  LD      block/built-in.o
  CC      fs/super.o
  CC      mm/page-writeback.o
  CC      fs/char_dev.o
  CC      kernel/cpu.o
  CC      kernel/exit.o
  CC      mm/readahead.o
  CC      fs/stat.o
  CC      fs/exec.o
  CC      fs/pipe.o
  LD      sound/built-in.o
  CC      kernel/itimer.o
  LD      firmware/built-in.o
  LD      drivers/auxdisplay/built-in.o
  CC      fs/namei.o
  CC      drivers/base/core.o
  CC      mm/swap.o
  LD      drivers/block/built-in.o
/scratch/kisskb/src/mm/bootmem.c: In function 'mark_bootmem':
/scratch/kisskb/src/mm/bootmem.c:420: warning: control reaches end of non-void function
  LD      arch/sh/mm/built-in.o
  LD      drivers/cdrom/built-in.o
  CC      fs/fcntl.o
  CC      drivers/char/mem.o
  CC      fs/ioctl.o
  LD      arch/sh/drivers/dma/built-in.o
  LD      arch/sh/drivers/built-in.o
  TIMEC   kernel/timeconst.h
  CC      mm/truncate.o
make[1]: *** [arch/sh/kernel] Error 2
make[1]: *** Waiting for unfinished jobs....
  CC      fs/readdir.o
  CC      kernel/softirq.o
  CC      drivers/char/random.o
  CC      mm/vmscan.o
  CC      kernel/resource.o
  LD      init/mounts.o
  LD      drivers/clocksource/built-in.o
  CC      fs/select.o
  LD      init/built-in.o
  CC      mm/shmem.o
  LD      drivers/firewire/built-in.o
  CC      fs/fifo.o
  CC      drivers/base/sys.o
  CC      fs/dcache.o
  LD      security/built-in.o
  CC      mm/prio_tree.o
  LD      drivers/firmware/built-in.o
  LD      drivers/gpio/built-in.o
  CC      mm/util.o
  CC      fs/inode.o
  CC      mm/mmzone.o
  CC      drivers/base/bus.o
  CC      mm/vmstat.o
  CC      drivers/base/dd.o
  CC      drivers/char/tty_io.o
  CC      mm/backing-dev.o
  CC      drivers/char/n_tty.o
  CC      fs/attr.o
  CC      drivers/base/driver.o
  CC      kernel/sysctl.o
  CC      kernel/sysctl_binary.o
  CC      kernel/capability.o
  CC      fs/bad_inode.o
  CC      fs/file.o
  CC      drivers/char/tty_ioctl.o
  CC      fs/filesystems.o
  CC      mm/page_isolation.o
  CC      kernel/ptrace.o
  CC      drivers/char/tty_ldisc.o
  CC      fs/namespace.o
  CC      mm/mm_init.o
  CC      fs/seq_file.o
  CC      fs/xattr.o
  CC      kernel/timer.o
  CC      kernel/user.o
  CC      mm/mmu_context.o
  CC      drivers/char/tty_buffer.o
  CC      mm/nommu.o
  CC      drivers/base/class.o
  LD      drivers/gpu/drm/i2c/built-in.o
  CC      drivers/char/tty_port.o
/scratch/kisskb/src/fs/dcache.c: In function 'd_materialise_unique':
/scratch/kisskb/src/fs/dcache.c:1899: warning: control reaches end of non-void function
  LD      drivers/gpu/drm/built-in.o
  CC      fs/libfs.o
  CC      fs/fs-writeback.o
  LD      drivers/gpu/vga/built-in.o
  CC      mm/init-mm.o
  LD      drivers/gpu/built-in.o
  LD      drivers/i2c/algos/built-in.o
  LD      drivers/i2c/busses/built-in.o
  CC      drivers/char/tty_mutex.o
  LD      drivers/i2c/muxes/built-in.o
  CC      drivers/base/platform.o
  LD      drivers/i2c/built-in.o
  LD      drivers/idle/built-in.o
  CC      mm/memblock.o
  CC      kernel/signal.o
  CC      kernel/sys.o
  CC      mm/dmapool.o
  CC      mm/sparse.o
  CC      mm/slub.o
  CC      kernel/kmod.o
  CC      fs/pnode.o
  LD      drivers/ieee1394/built-in.o
  CC      mm/percpu_up.o
  CC      fs/drop_caches.o
  CC      kernel/workqueue.o
  CC      mm/quicklist.o
  CC      drivers/char/misc.o
  CC      fs/splice.o
  CC      fs/sync.o
  CC      fs/utimes.o
  CC      fs/stack.o
  CC      fs/fs_struct.o
  CC      fs/statfs.o
  CC      kernel/pid.o
  CC      drivers/base/cpu.o
  CC      fs/no-block.o
  CC      drivers/base/firmware.o
  LD      fs/devpts/built-in.o
  CC      drivers/base/init.o
  LD      fs/notify/dnotify/built-in.o
  LD      fs/partitions/built-in.o
  LD      fs/notify/fanotify/built-in.o
  LD      fs/notify/inotify/built-in.o
  CC      drivers/base/map.o
  CC      kernel/rcupdate.o
  LD      fs/quota/built-in.o
  CC      kernel/extable.o
  LD      fs/notify/built-in.o
  LD      drivers/ieee802154/built-in.o
  CC      drivers/base/devres.o
  CC      fs/anon_inodes.o
  LD      drivers/lguest/built-in.o
  LD      drivers/macintosh/built-in.o
  CC      fs/ramfs/inode.o
  CC      drivers/base/attribute_container.o
  CC      fs/binfmt_script.o
  LD      drivers/media/IR/keymaps/built-in.o
  LD      drivers/media/common/tuners/built-in.o
  LD      drivers/media/IR/built-in.o
  LD      drivers/media/common/built-in.o
  LD      drivers/media/video/davinci/built-in.o
  CC      drivers/base/transport_class.o
  CC      fs/ramfs/file-nommu.o
  LD      drivers/media/video/built-in.o
  LD      drivers/base/power/built-in.o
  LD      drivers/media/built-in.o
  CC      drivers/base/dma-mapping.o
  CC      drivers/base/dma-coherent.o
  CC      kernel/params.o
  CC      kernel/posix-timers.o
  LD      drivers/mfd/built-in.o
  LD      drivers/misc/cb710/built-in.o
  LD      drivers/net/built-in.o
  LD      drivers/platform/built-in.o
  LD      drivers/misc/eeprom/built-in.o
  CC      drivers/rtc/rtc-lib.o
  CC      kernel/kthread.o
  LD      drivers/serial/built-in.o
  LD      drivers/misc/built-in.o
  CC      drivers/sh/clk.o
  CC      kernel/wait.o
  CC      drivers/video/fb_notify.o
  CC      drivers/sh/intc.o
  LD      drivers/video/backlight/built-in.o
  CC      drivers/sh/clk-cpg.o
  LD      drivers/video/display/built-in.o
  CC      kernel/kfifo.o
  CC      kernel/sys_ni.o
  CC      kernel/posix-cpu-timers.o
  LD      drivers/video/omap2/displays/built-in.o
  CC      kernel/mutex.o
  LD      drivers/video/omap2/dss/built-in.o
  LD      drivers/video/omap2/omapfb/built-in.o
  LD      drivers/video/omap2/built-in.o
  CC      kernel/hrtimer.o
  CC      kernel/rwsem.o
  CC      kernel/nsproxy.o
  CC      kernel/srcu.o
  CC      kernel/semaphore.o
  CC      kernel/notifier.o
  CC      kernel/ksysfs.o
  LD      drivers/base/built-in.o
  CC      kernel/pm_qos_params.o
  LD      fs/ramfs/ramfs.o
  LD      mm/built-in.o
  LD      drivers/rtc/built-in.o
  CC      kernel/sched_clock.o
  CC      kernel/cred.o
  LD      drivers/video/built-in.o
  CC      kernel/async.o
  CC      kernel/range.o
  CC      kernel/groups.o
  CC      kernel/irq/handle.o
  LD      drivers/char/built-in.o
  CC      kernel/irq/manage.o
  LD      fs/ramfs/built-in.o
  CC      kernel/irq/spurious.o
  CC      kernel/up.o
  CC      kernel/time/timekeeping.o
  CC      kernel/irq/resend.o
  CC      kernel/rcutree.o
  CC      kernel/irq/chip.o
  CC      kernel/perf_event.o
  CC      kernel/irq/devres.o
  CC      kernel/time/ntp.o
  CC      kernel/time/clocksource.o
  CC      kernel/hw_breakpoint.o
  CC      kernel/time/jiffies.o
/scratch/kisskb/src/kernel/pm_qos_params.c: In function 'pm_qos_get_value':
/scratch/kisskb/src/kernel/pm_qos_params.c:132: warning: control reaches end of non-void function
  CC      kernel/time.o
  CC      kernel/time/timer_list.o
  CC      kernel/time/timecompare.o
  CC      kernel/time/timeconv.o
  CC      kernel/time/clockevents.o
  LD      fs/built-in.o
  CC      kernel/time/tick-common.o
  LD      kernel/irq/built-in.o
  LD      drivers/sh/built-in.o
  LD      drivers/built-in.o
  LD      kernel/time/built-in.o
  LD      kernel/built-in.o
make: *** [sub-make] Error 2
make failed, trying to bisect ..
## bisect start
Last known good revision 3cfc2c42c1cbc8e238bb9c0612c0df4565e3a8b4
# < git symbolic-ref HEAD
# < git merge-base 3cfc2c42c1cbc8e238bb9c0612c0df4565e3a8b4 51ea8a88aae425915b458bfe295f1f10a3d52781

# < 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 3cfc2c42c1cbc8e238bb9c0612c0df4565e3a8b4
Bisecting: 3569 revisions left to test after this (roughly 12 steps)
[b58af4066d240b18b43f202e07b9ec7461d90b17] USB: serial: fix stalled writes
Trying 51ea8a88aae425915b458bfe295f1f10a3d52781

# < /scratch/kisskb/prod/kisskb/kisskb3/backend/makewrap.py ARCH=sh O=/scratch/kisskb/prod/kisskb/kisskb3/backend/build/linus_sh-allnoconfig_sh4 CROSS_COMPILE=/opt/crosstool/gcc-4.3.2-nolibc/bin/sh4-linux-  allnoconfig
makewrap: Added ccache to CROSS_COMPILE
makewrap: Using -j factor 32
make[2]: *** [allnoconfig] Segmentation fault
make[1]: *** [allnoconfig] Error 2
make: *** [sub-make] Error 2
bisect failed 51ea8a88aae425915b458bfe295f1f10a3d52781

# git bisect bad
Bisecting: 1782 revisions left to test after this (roughly 11 steps)
[4a386c3e177ca2fbc70c9283d0b46537844763a0] Merge branch 'x86-xsave-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
# < 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)