From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 24 Jul 2007 04:28:26 +0000 (+0900)
Subject: sh: Add kmap_coherent()/kunmap_coherent() interface for SH-4.
X-Git-Tag: v2.6.23-rc2~146^2~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8cf1a74305688c85fc8d23ab7432a0c447ee6413;p=pandora-kernel.git

sh: Add kmap_coherent()/kunmap_coherent() interface for SH-4.

This wires up kmap_coherent() and kunmap_coherent() on SH-4, and
moves away from the p3map_mutex and reserved P3 space, opting to
use fixmaps for colouring instead.

The copy_user_page()/clear_user_page() implementations are moved
to this, which fixes the nasty blowups with spinlock debugging
as a result of having some of these calls nested under the page
table lock.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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