2.6.34-rc7でこんなのが出たのでめも。rc6では見なかったんだけどな。

[   26.624246] BUG: using smp_processor_id() in preemptible [00000000] code: modprobe/1932
[   26.624252] caller is nr_iowait_cpu+0x1a/0x30
[   26.624255] Pid: 1932, comm: modprobe Not tainted 2.6.34-rc7-tip+ #1
[   26.624256] Call Trace:
[   26.624262]  [<ffffffff811ae65e>] debug_smp_processor_id+0xd2/0xec
[   26.624265]  [<ffffffff810325ba>] nr_iowait_cpu+0x1a/0x30
[   26.624268]  [<ffffffff8106c8fe>] update_ts_time_stats+0x3c/0x77
[   26.624271]  [<ffffffff81067e48>] ? ktime_get+0x65/0xbe
[   26.624274]  [<ffffffff8106cadf>] get_cpu_idle_time_us+0x49/0x68
[   26.624278]  [<ffffffff81265621>] get_cpu_idle_time+0x21/0xa9
[   26.624281]  [<ffffffff812662a3>] cpufreq_governor_dbs+0xd3/0x330
[   26.624284]  [<ffffffff8126365f>] __cpufreq_governor+0x78/0xbb
[   26.624286]  [<ffffffff812648d5>] __cpufreq_set_policy+0x158/0x198
[   26.624289]  [<ffffffff81264b71>] cpufreq_add_dev_interface+0x25c/0x282
[   26.624293]  [<ffffffffa03913a2>] ? do_drv_read+0x0/0x34 [acpi_cpufreq]
[   26.624296]  [<ffffffff81264f7c>] ? handle_update+0x0/0x13
[   26.624299]  [<ffffffff812655c8>] cpufreq_add_dev+0x483/0x493
[   26.624302]  [<ffffffff81234ed7>] sysdev_driver_register+0xc4/0x11e
[   26.624305]  [<ffffffff81263cc6>] cpufreq_register_driver+0x99/0x143
[   26.624308]  [<ffffffffa03950a7>] acpi_cpufreq_init+0xa7/0xe2 [acpi_cpufreq]
[   26.624311]  [<ffffffffa0395000>] ? acpi_cpufreq_init+0x0/0xe2 [acpi_cpufreq]
[   26.624314]  [<ffffffff8100020d>] do_one_initcall+0x72/0x17f
[   26.624317]  [<ffffffff81076c7e>] sys_init_module+0xd6/0x234
[   26.624320]  [<ffffffff81002c1b>] system_call_fastpath+0x16/0x1b