From: Alexander Duyck <alexander.h.duyck@intel.com>
Date: Fri, 26 Aug 2011 07:44:43 +0000 (+0000)
Subject: igb: Make first and tx_buffer_info->next_to_watch into pointers
X-Git-Tag: v3.2-rc1~129^2~123^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8542db05dbc99f603889c349e5cf8f3f81cddbf5;p=pandora-kernel.git

igb: Make first and tx_buffer_info->next_to_watch into pointers

This change converts two tx_buffer_info index values into pointers.  The
advantage to this is that we reduce unnecessary computations and in the case
of next_to_watch we get an added bonus of the value being able to provide
additional information as a NULL value indicates it is unset versus a 0 not
having any meaning for the index value.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by:  Aaron Brown  <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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