re #13613 rb4516 Tunables needs volatile keyword

*** 20,29 ****
--- 20,32 ----
   */
  /*
   * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
+ /*
+  * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
+  */
  
  /*
   * SunOS MT STREAMS ERI(PCI) 10/100 Mb Ethernet Device Driver
   */
  
*** 344,355 ****
  
  /*
   * ERI ERX Interrupt Blanking Time
   * Each count is about 16 us (2048 clocks) for 66 MHz PCI.
   */
! static  int     intr_blank_time = 6;    /* for about 96 us */
! static  int     intr_blank_packets = 8; /*  */
  
  /*
   * ERX PAUSE Threshold Register value
   * The following value is for an OFF Threshold of about 15.5 Kbytes
   * and an ON Threshold of 4K bytes.
--- 347,358 ----
  
  /*
   * ERI ERX Interrupt Blanking Time
   * Each count is about 16 us (2048 clocks) for 66 MHz PCI.
   */
! volatile int    intr_blank_time = 6;    /* for about 96 us */
! volatile int    intr_blank_packets = 8; /*  */
  
  /*
   * ERX PAUSE Threshold Register value
   * The following value is for an OFF Threshold of about 15.5 Kbytes
   * and an ON Threshold of 4K bytes.