scheduling while atomic

At first I was like
uname -a
Linux 2.6.36-rc0-git9-06241-g2ba110e-dirty

but then I was like
[    0.010045] BUG: scheduling while atomic: swapper/0/0x10000002
[    0.010140] no locks held by swapper/0.
[    0.010219] Modules linked in:
[    0.010356] Pid: 0, comm: swapper Not tainted 2.6.36-rc0-git9-06241-g2ba110e-dirty #99
[    0.010455] Call Trace:
[    0.010535]  [] __schedule_bug+0x72/0x77
[    0.010622]  [] schedule+0xdc/0x8f2
[    0.010707]  [] __cond_resched+0x13/0x1f
[    0.010792]  [] _cond_resched+0x29/0x30
[    0.010878]  [] acpi_ps_complete_op+0x2c6/0x2db
[    0.010965]  [] ? acpi_ds_load1_end_op+0x51/0x249
[    0.011052]  [] acpi_ps_parse_loop+0x8b8/0xa55
[    0.011139]  [] ? trace_hardirqs_on+0xd/0xf
[    0.011224]  [] acpi_ps_parse_aml+0x104/0x3c4
[    0.011310]  [] acpi_ns_one_complete_parse+0x125/0x142
[    0.011399]  [] ? acpi_os_signal_semaphore+0x5f/0x6f
[    0.011482]  [] acpi_ns_parse_table+0x49/0x8e
[    0.011567]  [] acpi_ns_load_table+0x78/0x114
[    0.011652]  [] acpi_load_tables+0xa1/0x18e
[    0.011736]  [] acpi_early_init+0x6c/0xf7
[    0.011821]  [] start_kernel+0x3fd/0x40d
[    0.011905]  [] x86_64_start_reservations+0xb1/0xb5
[    0.011990]  [] x86_64_start_kernel+0xf8/0x107


UPD:

 #define ACPI_PREEMPTION_POINT() \
  do { \
-  if (!in_atomic_preempt_off() && !irqs_disabled()) \
+  if (!irqs_disabled()) \
    cond_resched(); \
  } while (0)
+#endif