illumos gate

NULL pointer errors:

In file included from ../../common/sys/param.h:48:0,
                 from ../../common/sys/t_lock.h:38,
                 from ../../common/sys/signal.h:249,
                 from ../../common/sys/procset.h:40,
                 from ../../common/sys/processor.h:38,
                 from ../../intel/sys/hypervisor.h:71,
                 from ../../common/xen/io/evtchn_dev.c:60:
../../common/xen/io/evtchn_dev.c: In function 'evtchndrv_attach':
../../common/sys/null.h:32:14: error: passing argument 6 of 'ddi_create_minor_node' makes integer from pointer without a cast [-Werror=int-conversion]
 #define NULL ((void *)0)
              ^
../../common/xen/io/evtchn_dev.c:623:18: note: in expansion of macro 'NULL'
      DDI_PSEUDO, NULL);
                  ^~~~
In file included from ../../i86pc/sys/smp_impldefs.h:31:0,
                 from ../../common/xen/io/evtchn_dev.c:67:
../../common/sys/sunddi.h:1564:1: note: expected 'int' but argument is of type 'void *'
 ddi_create_minor_node(dev_info_t *dip, char *name, int spec_type,
 ^~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors