From: David S. Miller <davem@sunset.davemloft.net>
Date: Tue, 2 Oct 2007 08:03:09 +0000 (-0700)
Subject: [SPARC64]: Fix missing load-twin usage in Niagara-1 memcpy.
X-Git-Tag: v2.6.23~41^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=25e5566ed38650f7990041fcd20571d6ddd2a040;p=pandora-kernel.git

[SPARC64]: Fix missing load-twin usage in Niagara-1 memcpy.

For the case where the source is not aligned modulo 8
we don't use load-twins to suck the data in and this
kills performance since normal loads allocate in the
L1 cache (unlike load-twin) and thus big memcpys swipe
the entire L1 D-cache.

We need to allocate a register window to implement this
properly, but that actually simplifies a lot of things
as a nice side-effect.

Signed-off-by: David S. Miller <davem@davemloft.net>
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