e1000: add mmiowb() for IA64 to sync tail writes
authorJesse Brandeburg <jesse.brandeburg@intel.com>
Wed, 1 Nov 2006 16:47:42 +0000 (08:47 -0800)
committerJeff Garzik <jeff@garzik.org>
Sat, 2 Dec 2006 05:11:59 +0000 (00:11 -0500)
IA64 SMP systems were seeing TX issues with multiple cpu's attempting
to write tail registers unordered. This mmiowb() fixes the issue.

Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>

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