From: Stefan Richter <stefanr@s5r6.in-berlin.de>
Date: Sat, 29 Nov 2008 18:00:56 +0000 (+0100)
Subject: firewire: reorder struct fw_card for better cache efficiency
X-Git-Tag: v2.6.29-rc1~187^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c8a12d45d543905a2718fccafd612edbd73a1341;p=pandora-kernel.git

firewire: reorder struct fw_card for better cache efficiency

topology_map is by far the largest member in struct fw_card.  Move it to
the very end of the struct so that card pointer dereferences have better
chances to hit the CPU cache.

This requires to increase the topology_map backing store to the size
specified in IEEE 1394, i.e. 256 rather than 255 quadlets.  Otherwise
the topology_map response handler may access invalid memory.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
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