BUS_DMA_ISA is left over from Alpha, and is not used in the tree at

all.  The reference in ia64 code is due to cutNpaste in its history
and can safely be removed.

Revired by: cognet, raj, marcel, jhb and maybe one other whom I'm forgetting

sys/ia64/isa/isa_dma.c

@@ -106,7 +106,7 @@ isa_dma_init(int chan, u_int bouncebufsize, int flag __unused)
 			       /*filter*/NULL, /*filterarg*/NULL,
 			       /*maxsize*/bouncebufsize,
 			       /*nsegments*/1, /*maxsegz*/0x3ffff,
-			       /*flags*/BUS_DMA_ISA,
+			       /*flags*/0,
 			       /*lockfunc*/busdma_lock_mutex,
 			       /*lockarg*/&Giant,
 			       &dma_tag[chan]) != 0) {

sys/sys/bus_dma.h

@@ -101,7 +101,6 @@
  */
 #define	BUS_DMA_NOWRITE		0x100
 #define	BUS_DMA_NOCACHE		0x200
-#define	BUS_DMA_ISA		0x400	/* map memory for AXP ISA dma */
 
 /* Forwards needed by prototypes below. */
 struct mbuf;