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List:       linux-acpi
Subject:    Another bad usage of smp_processor_id
From:       Maxim Levitsky <maximlevitsky () gmail ! com>
Date:       2010-08-29 10:26:19
Message-ID: 1283077579.5529.2.camel () maxim-laptop
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Hi,

Now that I applied the patch that makes NMI watchdog not trigger this,
the amount of backtraces reduced, so I finally notice that on resume:

[ 3226.997285] Back to C!
[ 3226.997285] PM: Restoring platform NVS memory
[ 3226.997285] CPU0: Thermal monitoring handled by SMI
[ 3226.997285] Enabling non-boot CPUs ...
[ 3227.000076] BUG: using smp_processor_id() in preemptible [00000000] code: pm-suspend/5185
[ 3227.000085] caller is thermal_throttle_add_dev+0x20/0xa4
[ 3227.000091] Pid: 5185, comm: pm-suspend Tainted: P            2.6.36-rc2+ #132
[ 3227.000096] Call Trace:
[ 3227.000104]  [<ffffffff811e6242>] debug_smp_processor_id+0xd2/0xf0
[ 3227.000110]  [<ffffffff813a0174>] thermal_throttle_add_dev+0x20/0xa4
[ 3227.000117]  [<ffffffff813a0244>] thermal_throttle_cpu_callback+0x4c/0xb7
[ 3227.000123]  [<ffffffff81063c61>] notifier_call_chain+0x51/0x80
[ 3227.000130]  [<ffffffff810425d2>] ? cpu_maps_update_begin+0x12/0x20
[ 3227.000136]  [<ffffffff81063d19>] __raw_notifier_call_chain+0x9/0x10
[ 3227.000141]  [<ffffffff8104258b>] __cpu_notify+0x1b/0x30
[ 3227.000147]  [<ffffffff813a29d4>] _cpu_up+0x6e/0x10d
[ 3227.000153]  [<ffffffff81396335>] enable_nonboot_cpus+0x95/0xc0
[ 3227.000160]  [<ffffffff8107ffcc>] suspend_devices_and_enter+0x10c/0x1e0
[ 3227.000166]  [<ffffffff810801bc>] enter_state+0x11c/0x190
[ 3227.000172]  [<ffffffff8107f821>] state_store+0x91/0x100
[ 3227.000179]  [<ffffffff811d7a87>] kobj_attr_store+0x17/0x20
[ 3227.000185]  [<ffffffff8114a392>] sysfs_write_file+0xf2/0x170
[ 3227.000192]  [<ffffffff810df658>] vfs_write+0xc8/0x190
[ 3227.000198]  [<ffffffff810df7ff>] sys_write+0x4f/0x90
[ 3227.000205]  [<ffffffff81002deb>] system_call_fastpath+0x16/0x1b
[ 3227.000328] lockdep: fixing up alternatives.
[ 3227.000332] SMP alternatives: switching to SMP code

Best regards,
	Maxim Levitsky

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