6345 remove xhat support

@@ -123,38 +123,33 @@
         uchar_t a_updatedir;    /* mappings changed, rebuild a_objectdir */
         timespec_t a_updatetime;        /* time when mappings last changed */
         vnode_t **a_objectdir;  /* object directory (procfs) */
         size_t  a_sizedir;      /* size of object directory */
         struct as_callback *a_callbacks; /* callback list */
-        void *a_xhat;           /* list of xhat providers */
         proc_t  *a_proc;        /* back pointer to proc */
         size_t  a_resvsize;     /* size of reserved part of address space */
 };
 
 #define AS_PAGLCK               0x80
 #define AS_CLAIMGAP             0x40
 #define AS_UNMAPWAIT            0x20
 #define AS_NEEDSPURGE           0x10    /* mostly for seg_nf, see as_purge() */
 #define AS_NOUNMAPWAIT          0x02
-#define AS_BUSY                 0x01    /* needed by XHAT framework */
 
 #define AS_ISPGLCK(as)          ((as)->a_flags & AS_PAGLCK)
 #define AS_ISCLAIMGAP(as)       ((as)->a_flags & AS_CLAIMGAP)
 #define AS_ISUNMAPWAIT(as)      ((as)->a_flags & AS_UNMAPWAIT)
-#define AS_ISBUSY(as)           ((as)->a_flags & AS_BUSY)
 #define AS_ISNOUNMAPWAIT(as)    ((as)->a_flags & AS_NOUNMAPWAIT)
 
 #define AS_SETPGLCK(as)         ((as)->a_flags |= AS_PAGLCK)
 #define AS_SETCLAIMGAP(as)      ((as)->a_flags |= AS_CLAIMGAP)
 #define AS_SETUNMAPWAIT(as)     ((as)->a_flags |= AS_UNMAPWAIT)
-#define AS_SETBUSY(as)          ((as)->a_flags |= AS_BUSY)
 #define AS_SETNOUNMAPWAIT(as)   ((as)->a_flags |= AS_NOUNMAPWAIT)
 
 #define AS_CLRPGLCK(as)         ((as)->a_flags &= ~AS_PAGLCK)
 #define AS_CLRCLAIMGAP(as)      ((as)->a_flags &= ~AS_CLAIMGAP)
 #define AS_CLRUNMAPWAIT(as)     ((as)->a_flags &= ~AS_UNMAPWAIT)
-#define AS_CLRBUSY(as)          ((as)->a_flags &= ~AS_BUSY)
 #define AS_CLRNOUNMAPWAIT(as)   ((as)->a_flags &= ~AS_NOUNMAPWAIT)
 
 #define AS_TYPE_64BIT(as)       \
             (((as)->a_userlimit > (caddr_t)UINT32_MAX) ? 1 : 0)