igb: change the head and tail offsets into pointers
authorAlexander Duyck <alexander.h.duyck@intel.com>
Tue, 27 Oct 2009 15:51:27 +0000 (15:51 +0000)
committerDavid S. Miller <davem@davemloft.net>
Wed, 28 Oct 2009 08:20:24 +0000 (01:20 -0700)
commitfce99e341524c204ef3dd3e7c5f77265a7e05ddd
treede53c88cf94f52431f5fb662043c5c2dc15a7d90
parent952f72a8ceee3996ef8476a2f05ece1627080c20
igb: change the head and tail offsets into pointers

Since we are writting to the head/tail pointers frequently we might as well
save ourselves some processing time by converting the head and tail offsets
directly to pointers.  This will shave a few cycles off the rx/tx path and
allows us to move one step closer to the rings being a bit more independant of
each other.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/igb/igb.h
drivers/net/igb/igb_main.c