Intel ICH5 SATA150 memory mapping error on CURRENT

Hi,

I am receiving a memory mapping error on CURRENT (last built a few
minutes ago) with the Intel ICH5 SATA150 controller and Intel 865
chipset. dmesg shows the following:

...
ata1: [MPSAFE]
atapci1: <Intel ICH5 SATA150 controller> port 0xfe00-0xfe07,0xfe10-0xfe13,0xfe20
-0xfe27,0xfe30-0xfe33,0xfea0-0xfeaf irq 18 at device 31.2 on pci0
atapci1: Reserved 0x10 bytes for rid 0x20 type 4 at 0xfea0
atapci1: [MPSAFE]
atapci1: failed to enable memory mapping!
ata2: <ATA channel 0> on atapci1
atapci1: Reserved 0x8 bytes for rid 0x10 type 4 at 0xfe00
atapci1: Reserved 0x4 bytes for rid 0x14 type 4 at 0xfe10
ata2: reset tp1 mask=00 ostat0=ff ostat1=00
ata2: [MPSAFE]
ata3: <ATA channel 1> on atapci1
atapci1: Reserved 0x8 bytes for rid 0x18 type 4 at 0xfe20
atapci1: Reserved 0x4 bytes for rid 0x1c type 4 at 0xfe30
ata3: reset tp1 mask=00 ostat0=ff ostat1=00
ata3: [MPSAFE]
...


Unfortunately I have no disk to attach to the SATA controller, so I can
not investigate on this issue. (Because of this?) It seems to be a not
so critical error, which does not harm the systems stability. 
The system is a Dell Dimension 4600 without any disks attached to the
SATA controller, only to both ATAs.

The complete dmesg log (verbose logging) can be found at
http://sysfault.org/data/dmesg.output

If you need more information or something else, let me know.

Regards
Marcus