From: David S. Miller <davem@davemloft.net>
Date: Mon, 12 Oct 2009 10:20:57 +0000 (-0700)
Subject: sparc64: Fix D-cache flushing on swapin from SW devices.
X-Git-Tag: v2.6.32-rc5~18^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1a78cedb998027ed46d8630b319db8fa678d38f0;p=pandora-kernel.git

sparc64: Fix D-cache flushing on swapin from SW devices.

Thanks to tip form ARM folks and Russell King.

If flush_dcache_page() occurs on a swapin it will have a mapping
and we'll try to defer the flush by setting the dirty bit.

But when it hits update_dcache_page() we won't flush because the
page won't have a mapping any more.  So remove the mapping
requirement in flush_dcache().

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