OS-5223 removed shm segment is no longer available
Reviewed by: Bryan Cantrill <bryan@joyent.com>
Reviewed by: Patrick Mooney <patrick.mooney@joyent.com>

@@ -19,17 +19,16 @@
  * CDDL HEADER END
  */
 /*
  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
+ * Copyright 2016 Joyent, Inc.
  */
 
 #ifndef _SYS_SHM_IMPL_H
 #define _SYS_SHM_IMPL_H
 
-#pragma ident   "%Z%%M% %I%     %E% SMI"
-
 #include <sys/ipc_impl.h>
 #if defined(_KERNEL) || defined(_KMEMUSER)
 #include <sys/shm.h>
 #include <sys/avl.h>
 #include <sys/t_lock.h>

@@ -68,18 +67,30 @@
         time_t          shm_atime;      /* last shmat time */
         time_t          shm_dtime;      /* last shmdt time */
         time_t          shm_ctime;      /* last change time */
         struct sptinfo  *shm_sptinfo;   /* info about ISM segment */
         struct seg      *shm_sptseg;    /* pointer to ISM segment */
-        long            shm_sptprot;    /* was reserved (still a "long") */
+        ulong_t         shm_opts;
+                                        /*
+                                         * Composed of: sptprot (uchar_t) and
+                                         * RM_PENDING flag (1 bit).
+                                         */
 } kshmid_t;
 
 /*
  *      Segacct Flags.
  */
 #define SHMSA_ISM       1       /* uses shared page table */
 
+/*
+ * shm_opts definitions
+ * Low byte in shm_opts is used for sptprot (see PROT_ALL). The upper bits are
+ * used for additional options.
+ */
+#define SHM_PROT_MASK   0xff
+#define SHM_RM_PENDING  0x100
+
 typedef struct sptinfo {
         struct as       *sptas;         /* dummy as ptr. for spt segment */
 } sptinfo_t;
 
 /*