In file included from ../../common/sys/param.h:48:0,
                 from ../../common/io/sysevent.c:31:
../../common/io/sysevent.c: In function 'sysevent_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/io/sysevent.c:706:21: note: in expansion of macro 'NULL'
      0, DDI_PSEUDO, NULL) == DDI_FAILURE) {
                     ^~~~
In file included from ../../common/io/sysevent.c:37:0:
../../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,
 ^~~~~~~~~~~~~~~~~~~~~
In file included from ../../common/sys/param.h:48:0,
                 from ../../common/io/sysevent.c:31:
../../common/io/sysevent.c: At top level:
../../common/sys/null.h:32:14: error: initialization makes integer from pointer without a cast [-Werror=int-conversion]
 #define NULL ((void *)0)
              ^
../../common/io/sysevent.c:745:2: note: in expansion of macro 'NULL'
  NULL,   /* aread */
  ^~~~
../../common/sys/null.h:32:14: note: (near initialization for 'sysevent_cb_ops.cb_rev')
 #define NULL ((void *)0)
              ^
../../common/io/sysevent.c:745:2: note: in expansion of macro 'NULL'
  NULL,   /* aread */
  ^~~~
cc1: all warnings being treated as errors