x86/mce: machine check warning during poweroff

[Djalal Harouni <tixxdz@opendz.org>]

Today's pull from Linus' tree shows a warning during poweroff, the
message is related to the machinecheck.
The drivers/base/core.c:device_release() did not find the registred
release() function.

This kernel is used for development and it's running under KVM/Qemu, so
if you need further information or tests let me know.

Qemu is simulating 2 CPUs.

Thanks.


[ 1879.944193] ------------[ cut here ]------------
[ 1879.950488] WARNING: at drivers/base/core.c:194 device_release+0x82/0x90()
[ 1879.959424] Hardware name: Bochs
[ 1879.964714] Device 'machinecheck1' does not have a release() function, it is broken and must be fixed.
[ 1879.977354] Modules linked in:
[ 1879.979704] Pid: 1738, comm: halt Not tainted 3.2.0-minimal-kvm-05692-g1c81065-dirty #41
[ 1879.989093] Call Trace:
[ 1879.992729]  [<ffffffff8103952a>] warn_slowpath_common+0x7a/0xb0
[ 1879.999308]  [<ffffffff81039601>] warn_slowpath_fmt+0x41/0x50
[ 1880.005463]  [<ffffffff8172b022>] device_release+0x82/0x90
[ 1880.012915]  [<ffffffff81601667>] kobject_release+0x47/0x90
[ 1880.019107]  [<ffffffff8160152c>] kobject_put+0x2c/0x60
[ 1880.024269]  [<ffffffff8172acc2>] put_device+0x12/0x20
[ 1880.031254]  [<ffffffff8172ba19>] device_unregister+0x19/0x20
[ 1880.038594]  [<ffffffff81afb49d>] mce_cpu_callback+0xea/0x18b
[ 1880.043389]  [<ffffffff81b08924>] notifier_call_chain+0x64/0xf0
[ 1880.051928]  [<ffffffff81066c89>] __raw_notifier_call_chain+0x9/0x10
[ 1880.059077]  [<ffffffff8103b50b>] __cpu_notify+0x1b/0x30
[ 1880.063894]  [<ffffffff8103b530>] cpu_notify_nofail+0x10/0x20
[ 1880.071952]  [<ffffffff81ae27dd>] _cpu_down+0x11d/0x2c0
[ 1880.078534]  [<ffffffff81b01235>] ? printk+0x3c/0x3e
[ 1880.082662]  [<ffffffff8103b7cb>] disable_nonboot_cpus+0x8b/0x110
[ 1880.091129]  [<ffffffff81053f21>] kernel_power_off+0x21/0x50
[ 1880.098420]  [<ffffffff81054220>] sys_reboot+0x110/0x220
[ 1880.104098]  [<ffffffff8108efdd>] ? trace_hardirqs_on+0xd/0x10
[ 1880.112006]  [<ffffffff81b04deb>] ? _raw_spin_unlock_irq+0x2b/0x50
[ 1880.119181]  [<ffffffff8106dc0d>] ? finish_task_switch+0x8d/0x1a0
[ 1880.126741]  [<ffffffff8106dbce>] ? finish_task_switch+0x4e/0x1a0
[ 1880.134793]  [<ffffffff81b02f0b>] ? __schedule+0x3db/0x890
[ 1880.140510]  [<ffffffff81b0cfc7>] ? sysret_check+0x1b/0x56
[ 1880.148101]  [<ffffffff8160d33e>] ? trace_hardirqs_on_thunk+0x3a/0x3f
[ 1880.156706]  [<ffffffff81b0cfa2>] system_call_fastpath+0x16/0x1b
[ 1880.162885] ---[ end trace d8faf9d3af9f23e8 ]---
[ 1880.171148] Power down.


$ cat /proc/cpuinfo 
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 2
model name      : QEMU Virtual CPU version 0.12.5
stepping        : 3
microcode       : 0x1
cpu MHz         : 2800.047
cache size      : 4096 KB
fpu             : yes
fpu_exception   : yes
cpuid level     : 4
wp              : yes
flags           : fpu de pse tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pse36 clflush mmx fxsr sse sse2 syscall nx lm rep_good nopl pni cx16
tsc_deadlin _timer hypervisor lahf_lm
bogomips        : 5600.09
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management:


-- 
tixxdz
http://opendz.org