asm/io_apic.h is missing in drivers/pci/quirks.c with kernel 2.5.50

in file drivers/pci/quirks.c of linux kernel 2.5.50

#include <asm/io_apic.h>

is missing.

this include is necessary to avoid this error
in compilation time:

rivers/pci/quirks.c: In function `quirk_ioapic_rmw':
drivers/pci/quirks.c:354: `sis_apic_bug' undeclared (first use in this
function)
drivers/pci/quirks.c:354: (Each undeclared identifier is reported only
once
drivers/pci/quirks.c:354: for each function it appears in.)
make[2]: *** [drivers/pci/quirks.o] Error 1
make[1]: *** [drivers/pci] Error 2
make: *** [drivers] Error 2