strange messages on boot

[Sergey Matveychuk]

Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
atpic: Mismatched config for IRQ0: trigger level, polarity high
atpic: Mismatched config for IRQ0: trigger level, polarity high
atpic: Mismatched config for IRQ0: trigger level, polarity high
atpic: Mismatched config for IRQ0: trigger level, polarity high
atpic: Mismatched config for IRQ0: trigger level, polarity high
atpic: Mismatched config for IRQ0: trigger level, polarity high
atpic: Mismatched config for IRQ0: trigger level, polarity high
atpic: Mismatched config for IRQ0: trigger level, polarity high
atpic: Mismatched config for IRQ0: trigger level, polarity high
atpic: Mismatched config for IRQ0: trigger level, polarity high
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x4008-0x400b on acpi0
...

What does it mean?

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Sem.