OS-5566 ppoll timeout calculation can overflow
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>
Reviewed by: Robert Mustacchi <rm@joyent.com>
Reviewed by: Alex Wilson <alex.wilson@joyent.com>
Approved by: Robert Mustacchi <rm@joyent.com>

@@ -13,10 +13,11 @@
  *
  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  *
  * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
+ * Copyright 2016 Joyent, Inc.
  */
 
 /*
  * Copyright (c) 2013, 2015 by Delphix. All rights reserved.
  */

@@ -259,10 +260,18 @@
  */
 typedef longlong_t      hrtime_t;
 
 #if defined(_KERNEL) || defined(_FAKE_KERNEL)
 
+/*
+ * Unsigned counterpart to hrtime_t
+ */
+typedef u_longlong_t    uhrtime_t;
+
+#define HRTIME_MAX      LLONG_MAX
+#define UHRTIME_MAX     ULLONG_MAX
+
 #include <sys/time_impl.h>
 #include <sys/mutex.h>
 
 extern int tick_per_msec;       /* clock ticks per millisecond (may be zero) */
 extern int msec_per_tick;       /* milliseconds per clock tick (may be zero) */