Comment 0 for bug 1304028

Boot test failed:
- linaro-android_armv8-lsk-pre-merge-ci on device rtsm_fvp_base_cortex-a57x4-a53x4
https://validation.linaro.org/scheduler/job/119144/log_file#L_9_184

Kernel back trace:
---------------------------
[ 14.514316] binder: 1744:1744 ioctl c0186201 fffef9c0 returned -22
 [ 14.514479] binder: 1744:1744 ioctl c0186201 fffef8e8 returned -22
 [ 14.615182] Unable to handle kernel NULL pointer dereference at virtual address 00000010
 [ 14.615238] pgd = ffffffc87f1d9000
 [ 14.615282] [00000010] *pgd=0000000000000000
 [ 14.615336] Internal error: Oops: 96000005 [#1] SMP
 [ 14.615377] Modules linked in: gator
 [ 14.615457] CPU: 1 PID: 1754 Comm: keystore Not tainted 3.10.36-00191-g14a31bf #1
 [ 14.615526] task: ffffffc87f445500 ti: ffffffc87ed5c000 task.ti: ffffffc87ed5c000
 [ 14.615597] PC is at cpuidle_driver_ref+0x24/0x4c
 [ 14.615660] LR is at cpuidle_driver_ref+0x18/0x4c

...

[ 14.625129] [<ffffffc0004536dc>] cpuidle_driver_ref+0x24/0x4c
 [ 14.625201] [<ffffffc0000cef50>] hmp_idle_pull+0x354/0x4b0
 [ 14.625274] [<ffffffc0000d2b5c>] idle_balance+0x14c/0x188
 [ 14.625351] [<ffffffc00058cd54>] __schedule+0x63c/0x76c
 [ 14.625426] [<ffffffc00058cea8>] schedule+0x24/0x68
 [ 14.625502] [<ffffffc00058d150>] io_schedule+0x5c/0x90
 [ 14.625574] [<ffffffc000127194>] sleep_on_page_killable+0x8/0x48
 [ 14.625650] [<ffffffc00058b3e4>] __wait_on_bit+0x98/0xd0
 [ 14.625726] [<ffffffc000129638>] wait_on_page_bit_killable+0x78/0x8c
 [ 14.625803] [<ffffffc0001296f4>] __lock_page_or_retry+0xa8/0xcc
 [ 14.625879] [<ffffffc000129a98>] filemap_fault+0x380/0x3a8
 [ 14.625951] [<ffffffc0001464dc>] __do_fault+0x68/0x538
 [ 14.626026] [<ffffffc000148ff0>] handle_pte_fault+0x6c/0x840
 [ 14.626103] [<ffffffc00014a778>] handle_mm_fault+0xec/0x180
 [ 14.626176] [<ffffffc0000912f0>] do_page_fault+0x208/0x35c
 [ 14.626243] [<ffffffc000081118>] do_mem_abort+0x38/0x9c
 [ 14.626303] Exception stack(0xffffffc87ed5fe30 to 0xffffffc87ed5ff50)

Linux kernel Version:
Linux version 3.10.36-00191-g14a31bf (jenkins-build@ip-10-40-85-170) (gcc version 4.8.3 20131111 (prerelease) (Linaro GCC 4.8-2013.11) ) #1 SMP Fri Apr 4 22:19:16 UTC 2014

Android Build:
https://android-build.linaro.org/builds/~linaro-android/armv8-lsk-pre-merge-ci/#build=62