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/file.h:35,
                     from ../../common/sys/t_kuser.h:46,
                     from ../../common/sys/bootprops.h:31,
                     from ../../common/io/scsi/adapters/iscsi/iscsi_sess.c:27:
    ../../common/io/scsi/adapters/iscsi/iscsi_sess.c: In function 'iscsi_sess_state_machine':
    ../../common/sys/null.h:32:14: error: passing argument 5 of 'idm_sm_audit_event' makes integer from pointer without a cast [-Werror=int-conversion]
     #define NULL ((void *)0)
                  ^
    ../../common/io/scsi/adapters/iscsi/iscsi_sess.c:1097:46: note: in expansion of macro 'NULL'
          SAS_ISCSI_SESS, isp->sess_state, event, NULL);
                                                  ^~~~
    In file included from ../../common/io/scsi/adapters/iscsi/iscsi.h:56:0,
                     from ../../common/io/scsi/adapters/iscsi/iscsi_sess.c:28:
    ../../common/sys/idm/idm.h:274:6: note: expected 'uintptr_t {aka long unsigned int}' but argument is of type 'void *'
     void idm_sm_audit_event(sm_audit_buf_t *audit_buf,
          ^~~~~~~~~~~~~~~~~~

    ../../common/io/scsi/adapters/iscsi/iscsi_io.c: In function 'iscsi_wd_thread':
    ../../common/io/scsi/adapters/iscsi/iscsi_io.c:3397:12: error: comparison between pointer and integer [-Werror]
      while (rc != NULL) {
                ^~
    cc1: all warnings being treated as errors