XXXX introduce drv_sectohz

*** 24,33 ****
--- 24,36 ----
  
  /*
   * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
+ /*
+  * Copyright 2015 Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
+  */
  
  /*
   * UNIX Device Driver Interface functions
   *
   * This file contains functions that are to be added to the kernel
*** 460,469 ****
--- 463,487 ----
                  return (0);
  
          return (USEC_TO_TICK_ROUNDUP(microsecs));
  }
  
+ /*
+  * Convert from seconds to system time units (hz).
+  *
+  * If secs <= 0, return 0.
+  * Otherwise, convert seconds to ticks, rounding up.
+  */
+ clock_t
+ drv_sectohz(clock_t secs)
+ {
+         if (secs <= 0)
+                 return (0);
+ 
+         return (SEC_TO_TICK(secs));
+ }
+ 
  #ifdef  sun
  /*
   * drv_usecwait implemented in each architecture's machine
   * specific code somewhere. For sparc, it is the alternate entry
   * to usec_delay (eventually usec_delay goes away). See