log: *ERROR* radeon_cp_init - what is this?

That's what i see in /vat/log/messages:
...
kernel: [drm] Initialized drm 1.0.0 20040925
kernel: ACPI: PCI Interrupt 0000:01:00.0[A] -> Link [LNKA] -> GSI 10
(level, low) -> IRQ 10
kernel: [drm] Initialized radeon 1.16.0 20050311 on minor 0:
kernel: mtrr: type mismatch for e8000000,8000000 old: write-back new:
write-combining
kernel: [drm:radeon_cp_init] *ERROR* radeon_cp_init called without lock
held
kernel: [drm:drm_unlock] *ERROR* Process 1553 using kernel context 0
...
So, what is it? And is it possible to fix, how? Thank You.

-- 
Best regards,
Strong.