From: Russell King <rmk@dyn-67.arm.linux.org.uk>
Date: Tue, 6 Feb 2007 17:29:53 +0000 (+0000)
Subject: [ARM] Don't call consistent_sync() for DMA coherent memory
X-Git-Tag: v2.6.21-rc1~75^2~6^6~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7f8e33546d17c7d8849be3a6623c3b6b3c9b588b;p=pandora-kernel.git

[ARM] Don't call consistent_sync() for DMA coherent memory

Memory allocated by the coherent memory allocators will be marked
uncacheable, which means it's pointless calling consistent_sync()
to perform cache maintainence on this memory; it's just a waste of
CPU cycles.

Moreover, with the (subsequent) merge of outer cache support, it
actually breaks things to call consistent_sync() on anything but
direct-mapped memory.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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