kvm_timer_inject_irq_work warning

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WARNING: CPU: 3 PID: 18359 at /home/jintack/linux-nested/arch/arm64/kvm/../../../virt/kvm/arm/arch_timer.c:95 kvm_timer_inject_irq_work+0x38/0x74
Modules linked in:

CPU: 3 PID: 18359 Comm: kworker/u16:2 Not tainted 4.6.0-rc1+ #92
Hardware name: HP ProLiant m400 Server Cartridge (DT)
Workqueue: kvm_arch_timer kvm_timer_inject_irq_work
task: ffffffcfb76f4b00 ti: ffffffcfb0958000 task.ti: ffffffcfb0958000
PC is at kvm_timer_inject_irq_work+0x38/0x74
LR is at kvm_timer_inject_irq_work+0x58/0x74
pc : [<ffffff80080bc9c8>] lr : [<ffffff80080bc9e8>] pstate: 20000145
sp : ffffffcfb095bd50
x29: ffffffcfb095bd50 x28: ffffff8008b49000
x27: 0000000000000000 x26: ffffff8008c1fc50
x25: 0000000000000000 x24: 0000000000000000
x23: ffffffcfb7a97000 x22: ffffffc0e8543930
x21: ffffffcfb8031000 x20: ffffffcfb0c369b0
x19: ffffffcfb0c35310 x18: ffffffc0bab37d90
x17: ffffff8008800bb0 x16: 000000000000000e
x15: 0000000000000007 x14: 0000000000000000
x13: 0000000000000000 x12: 0000000000000000
x11: ffffff800879d500 x10: 0000000000000870
x9 : ffffffcfb0958000 x8 : ffffffcfb76f53d0
x7 : ffffffcffff52220 x6 : 0000000000a353ea
x5 : 0000000000000000 x4 : ffffffcfb8031000
x3 : ffffffcfb76f4b00 x2 : ffffffcfb8031020
x1 : 00000115f5e79c19 x0 : 0000000000000000

---[ end trace d0dbda373516c74e ]---
Call trace:
Exception stack(0xffffffcfb095bb90 to 0xffffffcfb095bcb0)
bb80:                                   ffffffcfb0c35310 ffffffcfb0c369b0
bba0: ffffffcfb095bd50 ffffff80080bc9c8 ffffffcfb095bbf0 ffffff800845ed28
bbc0: 0000000000000000 0000000000000002 ffffffcfb095bbf0 ffffff800845ec5c
bbe0: 0000000000000000 0000000000000001 ffffffcfb095bca0 ffffff800845f3c0
bc00: ffffffcfb27e2c00 ffffffcfb27e1c00 ffffffcfb5946900 ffffffcf8d617628
bc20: ffffffcf8d617600 ffffffcf8d617608 0000000000000000 00000115f5e79c19
bc40: ffffffcfb8031020 ffffffcfb76f4b00 ffffffcfb8031000 0000000000000000
bc60: 0000000000a353ea ffffffcffff52220 ffffffcfb76f53d0 ffffffcfb0958000
bc80: 0000000000000870 ffffff800879d500 0000000000000000 0000000000000000
bca0: 0000000000000000 0000000000000007
[<ffffff80080bc9c8>] kvm_timer_inject_irq_work+0x38/0x74
[<ffffff80080e1790>] process_one_work+0x160/0x414
[<ffffff80080e1aa4>] worker_thread+0x60/0x440
[<ffffff80080e7d4c>] kthread+0xdc/0xf0
[<ffffff8008085e10>] ret_from_fork+0x10/0x40
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WARNING: CPU: 3 PID: 18359 at /home/jintack/linux-nested/arch/arm64/kvm/../../../virt/kvm/arm/arch_timer.c:95 kvm_timer_inject_irq_work+0x38/0x74
Modules linked in:

CPU: 3 PID: 18359 Comm: kworker/u16:2 Tainted: G        W       4.6.0-rc1+ #92
Hardware name: HP ProLiant m400 Server Cartridge (DT)
Workqueue: kvm_arch_timer kvm_timer_inject_irq_work
task: ffffffcfb76f4b00 ti: ffffffcfb0958000 task.ti: ffffffcfb0958000
PC is at kvm_timer_inject_irq_work+0x38/0x74
LR is at kvm_timer_inject_irq_work+0x58/0x74
pc : [<ffffff80080bc9c8>] lr : [<ffffff80080bc9e8>] pstate: 20000145
sp : ffffffcfb095bd50
x29: ffffffcfb095bd50 x28: ffffff8008b49000
x27: 0000000000000000 x26: ffffff8008c1fc50
x25: 0000000000000000 x24: 0000000000000000
x23: ffffffcfb7a97000 x22: ffffffc0e8543930
x21: ffffffcfb8031000 x20: ffffffcf1f1ab250
x19: ffffffcf1f1a9bb0 x18: ffffffc0bab37d90
x17: ffffff8008800bb0 x16: 000000000000000e
x15: 0000000000000007 x14: 0000000000000000
x13: 0000000000000000 x12: 0000000000000000
x11: 00000000eac0c6e6 x10: 0000000000000000
x9 : 0000000000000004 x8 : 00000000000000b4
x7 : 0000000000000001 x6 : ffffffcf1f1a96a0
x5 : ffffffcfb7a97060 x4 : ffffffcf1f1ab258
x3 : ffffffcf1f1a96a0 x2 : ffffffcfb8031020
x1 : 00000115f5e79c19 x0 : 0000000000000000

---[ end trace d0dbda373516c74f ]---
Call trace:
Exception stack(0xffffffcfb095bb90 to 0xffffffcfb095bcb0)
bb80:                                   ffffffcf1f1a9bb0 ffffffcf1f1ab250
bba0: ffffffcfb095bd50 ffffff80080bc9c8 ffffffcffff28200 ffffff8008b49000
bbc0: ffffffcfb095bbf0 ffffff80080f07f0 ffffffcfb27f0c80 00000000000000b4
bbe0: 0000000000000000 ffffffcfb27f0c80 ffffffcfb095bc30 ffffff80080f1778
bc00: ffffffcfb27f0c80 ffffffcffff28200 0000000000000001 ffffffcf8d617628
bc20: ffffffcfb095bc50 ffffff80080f242c 0000000000000000 00000115f5e79c19
bc40: ffffffcfb8031020 ffffffcf1f1a96a0 ffffffcf1f1ab258 ffffffcfb7a97060
bc60: ffffffcf1f1a96a0 0000000000000001 00000000000000b4 0000000000000004
bc80: 0000000000000000 00000000eac0c6e6 0000000000000000 0000000000000000
bca0: 0000000000000000 0000000000000007
[<ffffff80080bc9c8>] kvm_timer_inject_irq_work+0x38/0x74
[<ffffff80080e1790>] process_one_work+0x160/0x414
[<ffffff80080e1aa4>] worker_thread+0x60/0x440
[<ffffff80080e7d4c>] kthread+0xdc/0xf0
[<ffffff8008085e10>] ret_from_fork+0x10/0x40