About "acpi0: reservation of ... failed" message in `dmesg`

[avatar Lin]

Hi,

  Our customers are concerned about the following messages in `dmesg` output.

===
acpi0: reservation of 0, a0000 (3) failed
acpi0: reservation of 100000, bff00000 (3) failed
===

  Please help to clarify this issue.

  Or , in other direction, where to find official document to convince
our customers that these messages are ignorable ?

Sincerely Yours,
Avator Lin