11909 THREAD_KPRI_RELEASE does nothing of the sort
Reviewed by: Bryan Cantrill <bryan@joyent.com>
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>

@@ -20,10 +20,11 @@
  * CDDL HEADER END
  */
 /*
  * Copyright (c) 1997-1998 by Sun Microsystems, Inc.
  * All rights reserved.
+ * Copyright 2019 Joyent, Inc.
  */
 
 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
 /*        All Rights Reserved   */
 

@@ -83,11 +84,11 @@
         int     ia_mode;        /* interactive on/off */
 } iaproc_t;
 
 
 /* flags */
-#define IAKPRI  0x01    /* thread at kernel mode priority */
+/* Formerly: IAKPRI 0x01 - thread at kernel model priority */
 #define IABACKQ 0x02    /* thread goes to back of disp q when preempted */
 #define IASLEPT 0x04    /* thread had long-term suspend - give new slice */
 
 
 #ifdef  __cplusplus