# < 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 3c06806e690885ce978ef180c8f8b6f8c17fb4b4
Head not built, building
# < git reset --mixed
# git branch -D linus
Deleted branch linus (was 3c06806).
# 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_se7751_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_se7751_defconfig_sh4 CROSS_COMPILE=/opt/crosstool/gcc-4.3.2-nolibc/bin/sh4-linux-  se7751_defconfig
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
warning: (SUPERH32) selects HAVE_HW_BREAKPOINT which has unmet direct dependencies (PERF_EVENTS)
# /scratch/kisskb/prod/kisskb/kisskb3/backend/makewrap.py ARCH=sh O=/scratch/kisskb/prod/kisskb/kisskb3/backend/build/linus_se7751_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_se7751_defconfig_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
warning: (SUPERH32) selects HAVE_HW_BREAKPOINT which has unmet direct dependencies (PERF_EVENTS)
  GEN     /scratch/kisskb/build/linus_se7751_defconfig_sh4/Makefile
  CHK     include/linux/version.h
  UPD     include/linux/version.h
  HOSTCC  scripts/kallsyms
  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
  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
  HOSTCC  usr/gen_init_cpio
  CHK     include/generated/compile.h
  CC      init/main.o
  CC      init/do_mounts.o
  CC      init/do_mounts_rd.o
  CC      init/do_mounts_initrd.o
  CC      arch/sh/kernel/clkdev.o
  CC      init/initramfs.o
  CC      arch/sh/mm/alignment.o
  AS      arch/sh/kernel/debugtraps.o
  CC      arch/sh/kernel/dma-nommu.o
  LD      arch/sh/boards/built-in.o
  CC      arch/sh/mm/cache.o
  CC      arch/sh/mm/init.o
  CC      arch/sh/kernel/dumpstack.o
  CC      arch/sh/mm/consistent.o
  CC      arch/sh/mm/mmap.o
  CC      arch/sh/kernel/idle.o
  CC      arch/sh/mm/cache-sh4.o
  CC      arch/sh/kernel/io.o
  CC      arch/sh/mm/flush-sh4.o
  CC      arch/sh/mm/extable_32.o
  CC      arch/sh/kernel/irq.o
  CC      arch/sh/boards/mach-se/7751/setup.o
  UPD     include/generated/compile.h
  CC      arch/sh/mm/fault_32.o
  CC      arch/sh/boards/mach-se/7751/io.o
  CC      arch/sh/kernel/irq_32.o
  CC      arch/sh/boards/mach-se/7751/irq.o
  CC      arch/sh/mm/ioremap.o
  CC      arch/sh/kernel/machvec.o
  CC      arch/sh/mm/kmap.o
  CC      init/version.o
  CC      kernel/sched.o
  CC      arch/sh/mm/pgtable.o
  CC      mm/bootmem.o
  GEN     usr/initramfs_data.cpio
  AS      usr/initramfs_data.o
  LD      usr/built-in.o
  CC      mm/filemap.o
  CC      arch/sh/mm/tlbflush_32.o
  CC      arch/sh/mm/tlb-sh4.o
  CC      fs/open.o
  CC      kernel/fork.o
  CC      kernel/exec_domain.o
  CC      arch/sh/mm/tlb-urb.o
  CC      kernel/panic.o
  CC      arch/sh/kernel/nmi_debug.o
  CC      arch/sh/kernel/process.o
  CC      arch/sh/mm/uncached.o
  CC      mm/mempool.o
  CC      fs/read_write.o
  CC      kernel/printk.o
  CC      fs/file_table.o
  CC      mm/oom_kill.o
  CC      arch/sh/kernel/process_32.o
  CC      mm/fadvise.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/boards/mach-se/7751/built-in.o
  LD      arch/sh/boards/mach-se/built-in.o
  CC      arch/sh/kernel/ptrace_32.o
  CC      ipc/util.o
  CC      fs/super.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      fs/char_dev.o
  CC      kernel/cpu.o
  CC      security/commoncap.o
  CC      kernel/exit.o
  CC      ipc/msgutil.o
  CC      security/min_addr.o
  CC      kernel/itimer.o
  CC      crypto/api.o
  TIMEC   kernel/timeconst.h
  CC      kernel/softirq.o
  CC      kernel/resource.o
  CC      fs/stat.o
  LD      arch/sh/mm/built-in.o
  CC      mm/maccess.o
  CC      mm/page_alloc.o
  CC      mm/page-writeback.o
  CC      mm/readahead.o
  CC      mm/swap.o
  CC      mm/truncate.o
  CC      ipc/msg.o
  CC      ipc/sem.o
  CC      fs/exec.o
  CC      kernel/sysctl.o
  CC      ipc/shm.o
  CC      ipc/ipcns_notifier.o
  LD      init/mounts.o
  LD      init/built-in.o
  CC      ipc/syscall.o
make[1]: *** [arch/sh/kernel] Error 2
make[1]: *** Waiting for unfinished jobs....
  CC      mm/vmscan.o
  CC      ipc/ipc_sysctl.o
  CC      fs/pipe.o
  CC      mm/shmem.o
  CC      mm/prio_tree.o
  CC      kernel/sysctl_binary.o
  CC      crypto/cipher.o
  CC      crypto/compress.o
  CC      mm/util.o
  CC      fs/namei.o
  CC      kernel/capability.o
  CC      mm/mmzone.o
  CC      mm/vmstat.o
  CC      mm/backing-dev.o
  CC      kernel/ptrace.o
  CC      kernel/timer.o
  CC      mm/page_isolation.o
  CC      fs/fcntl.o
  LD      security/built-in.o
  CC      fs/ioctl.o
  CC      kernel/user.o
  CC      fs/readdir.o
  LD      crypto/crypto.o
  LD      crypto/built-in.o
  CC      mm/mm_init.o
  CC      kernel/signal.o
  CC      kernel/sys.o
  CC      mm/mmu_context.o
  CC      kernel/kmod.o
  CC      kernel/workqueue.o
  CC      mm/fremap.o
  CC      kernel/pid.o
  CC      fs/select.o
  CC      mm/highmem.o
  CC      kernel/rcupdate.o
  CC      mm/madvise.o
  CC      fs/fifo.o
  LD      ipc/built-in.o
  CC      kernel/extable.o
  CC      kernel/params.o
  CC      mm/memory.o
  CC      fs/dcache.o
  CC      kernel/posix-timers.o
  CC      kernel/kthread.o
  CC      fs/inode.o
  CC      fs/attr.o
  CC      mm/mincore.o
  CC      kernel/wait.o
  CC      mm/mlock.o
  CC      fs/bad_inode.o
  CC      mm/mmap.o
  CC      fs/file.o
  CC      fs/filesystems.o
  CC      mm/mprotect.o
  CC      kernel/kfifo.o
  CC      kernel/sys_ni.o
  CC      kernel/posix-cpu-timers.o
  CC      kernel/mutex.o
  CC      mm/mremap.o
  CC      fs/namespace.o
  CC      kernel/hrtimer.o
  CC      mm/msync.o
  CC      kernel/rwsem.o
  CC      kernel/nsproxy.o
  CC      kernel/srcu.o
  CC      mm/rmap.o
  CC      mm/vmalloc.o
  CC      fs/seq_file.o
  CC      kernel/semaphore.o
  CC      mm/pagewalk.o
  CC      fs/xattr.o
  CC      fs/libfs.o
  CC      fs/fs-writeback.o
  CC      mm/init-mm.o
  CC      mm/memblock.o
  CC      mm/page_io.o
  CC      mm/swap_state.o
  CC      kernel/notifier.o
  CC      kernel/ksysfs.o
  CC      kernel/pm_qos_params.o
  CC      kernel/sched_clock.o
  CC      fs/pnode.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
  CC      fs/drop_caches.o
  CC      kernel/cred.o
  CC      fs/splice.o
  CC      mm/swapfile.o
  CC      kernel/async.o
  CC      kernel/range.o
  CC      kernel/groups.o
  CC      mm/thrash.o
  CC      kernel/irq/handle.o
  CC      fs/sync.o
  CC      kernel/irq/manage.o
  CC      kernel/irq/spurious.o
  CC      fs/utimes.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/irq/resend.o
  CC      mm/dmapool.o
  CC      fs/stack.o
  CC      fs/fs_struct.o
  CC      kernel/time/timekeeping.o
  CC      kernel/futex.o
  CC      mm/slab.o
  CC      kernel/time/ntp.o
  CC      mm/percpu_up.o
  CC      kernel/rtmutex.o
  CC      kernel/up.o
  CC      fs/statfs.o
  CC      kernel/uid16.o
  CC      kernel/irq/chip.o
  CC      fs/buffer.o
  CC      kernel/irq/devres.o
  CC      kernel/module.o
  CC      kernel/kallsyms.o
  CC      kernel/irq/proc.o
  CC      fs/bio.o
  CC      fs/block_dev.o
  CC      mm/quicklist.o
  CC      fs/direct-io.o
  CC      kernel/acct.o
  CC      fs/mpage.o
  CC      fs/ioprio.o
  CC      kernel/rcutree.o
  CC      fs/devpts/inode.o
  CC      kernel/utsname_sysctl.o
  CC      kernel/time/clocksource.o
  CC      kernel/time/jiffies.o
  CC      kernel/elfcore.o
  CC      fs/ext2/balloc.o
  CC      kernel/perf_event.o
  CC      fs/ext2/dir.o
  CC      fs/ext2/file.o
  CC      fs/notify/fsnotify.o
  LD      kernel/irq/built-in.o
  CC      fs/ext2/ialloc.o
  CC      fs/jffs2/compr.o
  CC      fs/ext2/inode.o
  CC      kernel/hw_breakpoint.o
  CC      kernel/time/timer_list.o
  CC      fs/ext2/ioctl.o
  CC      fs/ext2/namei.o
  CC      fs/notify/notification.o
  CC      fs/partitions/check.o
  CC      fs/notify/group.o
  CC      fs/ext2/super.o
  LD      fs/devpts/devpts.o
  LD      fs/devpts/built-in.o
  CC      fs/proc/mmu.o
  CC      fs/jffs2/dir.o
  CC      fs/ext2/symlink.o
  CC      fs/proc/task_mmu.o
  CC      kernel/time/timecompare.o
  CC      fs/notify/inode_mark.o
  CC      fs/partitions/msdos.o
  CC      kernel/time.o
  CC      fs/notify/mark.o
  CC      fs/proc/inode.o
  CC      kernel/time/timeconv.o
  CC      kernel/time/clockevents.o
  CC      fs/proc/root.o
  CC      fs/proc/base.o
  LD      fs/quota/built-in.o
  CC      fs/proc/generic.o
  CC      fs/ramfs/inode.o
  CC      fs/proc/array.o
  CC      fs/ramfs/file-mmu.o
  CC      fs/jffs2/file.o
  CC      fs/sysfs/inode.o
  CC      fs/sysfs/file.o
  CC      fs/sysfs/dir.o
  CC      fs/jffs2/ioctl.o
  CC      fs/jffs2/nodelist.o
  CC      fs/sysfs/symlink.o
  CC      fs/sysfs/mount.o
  CC      fs/notify/vfsmount_mark.o
  CC      fs/sysfs/bin.o
  CC      fs/eventpoll.o
  CC      kernel/time/tick-common.o
  CC      fs/jffs2/malloc.o
  CC      fs/jffs2/read.o
  CC      fs/proc/proc_tty.o
  CC      fs/notify/dnotify/dnotify.o
  LD      fs/notify/fanotify/built-in.o
  CC      fs/sysfs/group.o
  LD      fs/ramfs/ramfs.o
  LD      fs/ramfs/built-in.o
  CC      fs/anon_inodes.o
  CC      fs/signalfd.o
  CC      fs/jffs2/nodemgmt.o
  CC      fs/jffs2/readinode.o
  CC      fs/notify/inotify/inotify_fsnotify.o
  CC      fs/timerfd.o
  LD      mm/built-in.o
  CC      fs/notify/inotify/inotify_user.o
  CC      fs/jffs2/write.o
  CC      fs/proc/cmdline.o
  CC      fs/jffs2/scan.o
  CC      fs/eventfd.o
  CC      fs/aio.o
  CC      fs/locks.o
  LD      fs/notify/dnotify/built-in.o
  CC      fs/binfmt_script.o
  LD      fs/partitions/built-in.o
  CC      fs/binfmt_elf.o
  CC      fs/jffs2/gc.o
  CC      fs/proc/cpuinfo.o
  LD      kernel/time/built-in.o
  CC      fs/proc/devices.o
  CC      fs/jffs2/symlink.o
  LD      fs/sysfs/built-in.o
  CC      fs/jffs2/build.o
  CC      fs/jffs2/erase.o
  CC      fs/jffs2/background.o
  CC      fs/proc/interrupts.o
  CC      fs/jffs2/fs.o
  CC      fs/proc/loadavg.o
  CC      fs/jffs2/writev.o
  CC      fs/jffs2/super.o
  CC      fs/proc/meminfo.o
  LD      fs/ext2/ext2.o
  LD      fs/ext2/built-in.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/proc/proc_net.o
  CC      fs/proc/kcore.o
  CC      fs/jffs2/debug.o
  CC      fs/proc/kmsg.o
  CC      fs/proc/page.o
  CC      fs/jffs2/wbuf.o
  CC      fs/jffs2/compr_rtime.o
  CC      fs/jffs2/compr_zlib.o
  LD      fs/notify/inotify/built-in.o
  LD      fs/notify/built-in.o
  LD      fs/proc/proc.o
  LD      fs/proc/built-in.o
  LD      fs/jffs2/jffs2.o
  LD      fs/jffs2/built-in.o
  LD      fs/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 3c06806e690885ce978ef180c8f8b6f8c17fb4b4

# < 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: 3402 revisions left to test after this (roughly 12 steps)
[4287341d4dba27ef8048f589e3c0bc683c9f2017] tty: Fix the digi acceleport driver NULL checks
Trying 3c06806e690885ce978ef180c8f8b6f8c17fb4b4

# < /scratch/kisskb/prod/kisskb/kisskb3/backend/makewrap.py ARCH=sh O=/scratch/kisskb/prod/kisskb/kisskb3/backend/build/linus_se7751_defconfig_sh4 CROSS_COMPILE=/opt/crosstool/gcc-4.3.2-nolibc/bin/sh4-linux-  se7751_defconfig
makewrap: Added ccache to CROSS_COMPILE
makewrap: Using -j factor 32
make[2]: *** [se7751_defconfig] Segmentation fault
make[1]: *** [se7751_defconfig] Error 2
make: *** [sub-make] Error 2
bisect failed 3c06806e690885ce978ef180c8f8b6f8c17fb4b4

# git bisect bad
Bisecting: 1697 revisions left to test after this (roughly 11 steps)
[b62ad9ab181a67207a4c8c373461b587c4861a68] Merge branch 'timers-timekeeping-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)