MFi386 revision 1.421

- Use kmem_alloc_nofault() rather than kmem_alloc_pageable() in
   pmap_mapdev().  See revision 1.140 of kern/sys_pipe.c for a detailed
   rationale.

sys/arm/arm/pmap.c

@@ -4372,7 +4372,7 @@ pmap_mapdev(vm_offset_t pa, vm_size_t size)
 	
 	GIANT_REQUIRED;
 	
-	va = kmem_alloc_pageable(kernel_map, size);
+	va = kmem_alloc_nofault(kernel_map, size);
 	if (!va)
 		panic("pmap_mapdev: Couldn't alloc kernel virtual memory");