spurious interrupt with ac kernel but not with vanilla 2.4.9

[Luigi Genoni]

HI,

I noticed that on the abit kt7A MBs that i have, with via KT133A chipset,
after i installed the kernel 2.4.9-ac10 (ac11 and 12 as well),
at boot i get this message,

Sep 21 11:52:11 DarkStar kernel: ice 00:0b.0
Sep 21 11:52:11 DarkStar kernel: spurious 8259A interrupt: IRQ7.
 immediatelly before scsi adaptec detection and inizzializzation.

doing a cat /proc/interrupt I can read

ERR:	1

As many people I have parport on irq 7, and the parport simply works
anyway (tested with a printer).

I was thinking to an HW problem, but with vanilla 2.4.9 kernel I do not
get this message, and the code in arch/i386/kernel/i8259.c that should
detect this spurious interrup is just the same on those two kernels.
Changes are related to X86_IO_APIC, and I think this is the reason why
this spurious interrupt is detected, but I would like to know if i should
think I have some HW problem going on that stardard kernels do not detect.

bests
Luigi