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| author | Andreas Herrmann <andreas.herrmann3@amd.com> | 2012-10-22 22:55:10 (GMT) |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2012-10-22 22:55:10 (GMT) |
| commit | e4df1cbcc1f329e53a1fff7450b2229e0addff20 (patch) | |
| tree | 8fda673930751823ab60dbbe3f39b8356e987f95 /arch/powerpc/kernel/traps.c | |
| parent | debe081aaa4d247b9957ac2336d84deab32d9909 (diff) | |
| download | linux-e4df1cbcc1f329e53a1fff7450b2229e0addff20.tar.xz | |
cpufreq / powernow-k8: Remove usage of smp_processor_id() in preemptible code
Commit 6889125b8b4e09c5e53e6ecab3433bed1ce198c9
(cpufreq/powernow-k8: workqueue user shouldn't migrate the kworker to another CPU)
causes powernow-k8 to trigger a preempt warning, e.g.:
BUG: using smp_processor_id() in preemptible [00000000] code: cpufreq/3776
caller is powernowk8_target+0x20/0x49
Pid: 3776, comm: cpufreq Not tainted 3.6.0 #9
Call Trace:
[<ffffffff8125b447>] debug_smp_processor_id+0xc7/0xe0
[<ffffffff814877e7>] powernowk8_target+0x20/0x49
[<ffffffff81482b02>] __cpufreq_driver_target+0x82/0x8a
[<ffffffff81484fc6>] cpufreq_governor_performance+0x4e/0x54
[<ffffffff81482c50>] __cpufreq_governor+0x8c/0xc9
[<ffffffff81482e6f>] __cpufreq_set_policy+0x1a9/0x21e
[<ffffffff814839af>] store_scaling_governor+0x16f/0x19b
[<ffffffff81484f16>] ? cpufreq_update_policy+0x124/0x124
[<ffffffff8162b4a5>] ? _raw_spin_unlock_irqrestore+0x2c/0x49
[<ffffffff81483640>] store+0x60/0x88
[<ffffffff811708c0>] sysfs_write_file+0xf4/0x130
[<ffffffff8111243b>] vfs_write+0xb5/0x151
[<ffffffff811126e0>] sys_write+0x4a/0x71
[<ffffffff816319a9>] system_call_fastpath+0x16/0x1b
Fix this by by always using work_on_cpu().
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'arch/powerpc/kernel/traps.c')
0 files changed, 0 insertions, 0 deletions