Comment 0 for bug 1104753

I have submitted an job on TC2 with Android image. where i have notice boot_linaro_android_image failed.
issues seems to be kernel issue so i have reported on to "linaro-landing-team-arm" project
LAVA JOB:
--------------
http://validation.linaro.org/lava-server/scheduler/job/45998/log_file

Error log:
--------------
The system is going down for reboot NOW!
udevd[1974]: '/sbin/blkid -o udev -p /dev/mmcblk0p6' [2013] terminated by signal 15 (Terminated)

 * Asking all remaining processes to terminate...  [ OK ]
 * All processes ended within 1 seconds....  [ OK ]
 * Deconfiguring network interfaces...  [ OK ]
 * Deactivating swap...  [ OK ]
umount: /run/lock: not mounted
umount: /run/shm: not mounted
 * Will now restart
[ 2642.612250]
[ 2642.616702] ======================================================
[ 2642.635205] [ INFO: possible circular locking dependency detected ]
[ 2642.653973] 3.7.0-rc8+ #1 Not tainted
[ 2642.664923] -------------------------------------------------------
[ 2642.683688] reboot/2183 is trying to acquire lock:
[ 2642.698025] (s_active#27){++++.+}, at: [<c010174f>] sysfs_remove_dir+0x5b/0x78
[ 2642.719970]
[ 2642.719970] but task is already holding lock:
[ 2642.737433] (&per_cpu(cpu_policy_rwsem, cpu)){+.+.+.}, at: [<c02e8bb3>] lock_policy_rwsem_write+0x27/0x6c
[ 2642.766522]
[ 2642.766522] which lock already depends on the new lock.
[ 2642.766522]
[ 2642.791018]
[ 2642.791018] the existing dependency chain (in reverse order) is:
[ 2642.813430]
-> #1 (&per_cpu(cpu_policy_rwsem, cpu)){+.+.+.}:
[ 2642.830923] [<c005cc3f>] lock_acquire+0x5f/0xbc
[ 2642.846317] [<c03dea07>] down_write+0x27/0x34
[ 2642.861191] [<c02e8bb3>] lock_policy_rwsem_write+0x27/0x6c
[ 2642.879447] [<c02e8c47>] store+0x23/0x60
[ 2642.893015] [<c0100319>] sysfs_write_file+0xad/0xf8
[ 2642.909447] [<c00bb325>] vfs_write+0x69/0xcc
[ 2642.924059] [<c00bb4d3>] sys_write+0x2f/0x50
[ 2642.938667] [<c000cc81>] ret_fast_syscall+0x1/0x52
[ 2642.954843]
-> #0 (s_active#27){++++.+}:
[ 2642.967137] [<c005c493>] __lock_acquire+0x10af/0x14e4
[ 2642.984091] [<c005cc3f>] lock_acquire+0x5f/0xbc
[ 2642.999481] [<c0101399>] sysfs_addrm_finish+0xbd/0x120
[ 2643.016696] [<c010174f>] sysfs_remove_dir+0x5b/0x78
[ 2643.033131] [<c02531c3>] kobject_del+0xb/0x28
[ 2643.048003] [<c025321f>] kobject_release+0x3f/0x50
[ 2643.064177] [<c02e83bb>] cpufreq_cpu_put+0xf/0x24
[ 2643.080090] [<c02e94dd>] __cpufreq_remove_dev+0x1a9/0x1c4
[ 2643.098085] [<c03d98bd>] cpufreq_cpu_callback+0x41/0x4c
[ 2643.115560] [<c0037d21>] notifier_call_chain+0x45/0x58
[ 2643.132774] [<c001e4e3>] __cpu_notify+0x1f/0x34
[ 2643.148167] [<c03d2a99>] _cpu_down+0x65/0x1ac
[ 2643.163038] [<c001e713>] disable_nonboot_cpus+0x4b/0xa4
[ 2643.180511] [<c002b2df>] kernel_restart+0x13/0x3c
[ 2643.196425] [<c002b417>] sys_reboot+0x103/0x160
[ 2643.211940] [<c000cc81>] ret_fast_syscall+0x1/0x52
[ 2643.228162]
[ 2643.228162] other info that might help us debug this:
[ 2643.228162]
[ 2643.252136] Possible unsafe locking scenario:
[ 2643.252136]
[ 2643.269859] CPU0 CPU1
[ 2643.283414] ---- ----
[ 2643.296969] lock(&per_cpu(cpu_policy_rwsem, cpu));
[ 2643.311953] lock(s_active#27);
[ 2643.329210] lock(&per_cpu(cpu_policy_rwsem, cpu));
[ 2643.351755] lock(s_active#27);
[ 2643.361636]
[ 2643.361636] *** DEADLOCK ***
[ 2643.361636]
[ 2643.379529] 4 locks held by reboot/2183:
[ 2643.391261] #0: (reboot_mutex){+.+.+.}, at: [<c002b3a1>] sys_reboot+0x8d/0x160
[ 2643.413458] #1: (cpu_add_remove_lock){+.+.+.}, at: [<c001e6db>] disable_nonboot_cpus+0x13/0xa4
[ 2643.439821] #2: (cpu_hotplug.lock){+.+.+.}, at: [<c001e55b>] cpu_hotplug_begin+0x23/0x40
[ 2643.464621] #3: (&per_cpu(cpu_policy_rwsem, cpu)){+.+.+.}, at: [<c02e8bb3>] lock_policy_rwsem_write+0x27/0x6c
[ 2643.494890]
[ 2643.494890] stack backtrace:
[ 2643.507940] [<c0012101>] (unwind_backtrace+0x1/0x9c) from [<c03da771>] (print_circular_bug+0x1b1/0x1fc)
[ 2643.536089] [<c03da771>] (print_circular_bug+0x1b1/0x1fc) from [<c005c493>] (__lock_acquire+0x10af/0x14e4)
[ 2643.565020] [<c005c493>] (__lock_acquire+0x10af/0x14e4) from [<c005cc3f>] (lock_acquire+0x5f/0xbc)
[ 2643.591990] [<c005cc3f>] (lock_acquire+0x5f/0xbc) from [<c0101399>] (sysfs_addrm_finish+0xbd/0x120)
[ 2643.619099] [<c0101399>] (sysfs_addrm_finish+0xbd/0x120) from [<c010174f>] (sysfs_remove_dir+0x5b/0x78)
[ 2643.647249] [<c010174f>] (sysfs_remove_dir+0x5b/0x78) from [<c02531c3>] (kobject_del+0xb/0x28)
[ 2643.673055] [<c02531c3>] (kobject_del+0xb/0x28) from [<c025321f>] (kobject_release+0x3f/0x50)
[ 2643.698603] [<c025321f>] (kobject_release+0x3f/0x50) from [<c02e83bb>] (cpufreq_cpu_put+0xf/0x24)
[ 2643.725191] [<c02e83bb>] (cpufreq_cpu_put+0xf/0x24) from [<c02e94dd>] (__cpufreq_remove_dev+0x1a9/0x1c4)
[ 2643.753600] [<c02e94dd>] (__cpufreq_remove_dev+0x1a9/0x1c4) from [<c03d98bd>] (cpufreq_cpu_callback+0x41/0x4c)
[ 2643.783572] [<c03d98bd>] (cpufreq_cpu_callback+0x41/0x4c) from [<c0037d21>] (notifier_call_chain+0x45/0x58)
[ 2643.812764] [<c0037d21>] (notifier_call_chain+0x45/0x58) from [<c001e4e3>] (__cpu_notify+0x1f/0x34)
[ 2643.839873] [<c001e4e3>] (__cpu_notify+0x1f/0x34) from [<c03d2a99>] (_cpu_down+0x65/0x1ac)
[ 2643.864636] [<c03d2a99>] (_cpu_down+0x65/0x1ac) from [<c001e713>] (disable_nonboot_cpus+0x4b/0xa4)
[ 2643.891483] [<c001e713>] (disable_nonboot_cpus+0x4b/0xa4) from [<c002b2df>] (kernel_restart+0x13/0x3c)
[ 2643.919372] [<c002b2df>] (kernel_restart+0x13/0x3c) from [<c002b417>] (sys_reboot+0x103/0x160)
[ 2643.945177] [<c002b417>] (sys_reboot+0x103/0x160) from [<c000cc81>] (ret_fast_syscall+0x1/0x52)
[ 2643.972176] CPU0 packing on CPU-1
[ 2643.982117] CPU4 packing on CPU-1
[ 2643.992134] CPU0 packing on CPU-1
[ 2644.008833] CPU4: shutdown
[ 2644.017967] Restarting system.
Rebooting...
Disabling debug USB.
Switching off ATX PSU.
Board powered down, rebooting...

ARM V2M Firmware v3.1.1
Build Date: Aug 20 2012

Date: Fri 25 Jan 2013
Time: 04:04:07