From: Haavard Skinnemoen <hskinnemoen@atmel.com>
Date: Mon, 18 Jun 2007 12:08:18 +0000 (+0200)
Subject: [AVR32] Fix bug in invalidate_dcache_region()
X-Git-Tag: v2.6.22-rc6~33
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ab61f7d21ab7f564fce322c498e4a7d6171140db;p=pandora-kernel.git

[AVR32] Fix bug in invalidate_dcache_region()

If (start + size) is not cacheline aligned and (start & mask) > (end &
mask), the last but one cacheline won't be invalidated as it should.
Fix this by rounding `end' down to the nearest cacheline boundary if
it gets adjusted due to misalignment.

Also flush the write buffer unconditionally -- if the dcache wrote
back a line just before we invalidated it, the dirty data may be
sitting in the write buffer waiting to corrupt our buffer later.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
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