DECstation fails to compile when your iomap patch is applied. (FWIW, DECstations don't have PCI at all, only TurboCHANNEL). CC arch/mips/lib/iomap.o arch/mips/lib/iomap.c: In function ‘pci_iomap’: arch/mips/lib/iomap.c:66: error: ‘_CACHE_CACHABLE_COW’ undeclared (first use in this function) arch/mips/lib/iomap.c:66: error: (Each undeclared identifier is reported only once arch/mips/lib/iomap.c:66: error: for each function it appears in.) make[1]: *** [arch/mips/lib/iomap.o] Error 1 -- Martin Michlmayr http://www.cyrius.com/