From: Will Deacon <will.deacon@arm.com>
Date: Tue, 14 Sep 2010 08:51:43 +0000 (+0100)
Subject: ARM: 6388/1: errata: DMB operation may be faulty
X-Git-Tag: v2.6.36-rc6~11^2~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9f05027c7cb3cfe56a31892bd83391138d41a667;p=pandora-kernel.git

ARM: 6388/1: errata: DMB operation may be faulty

On versions of the Cortex-A9 up to and including r2p2, under rare
circumstances, a DMB instruction between 2 write operations may not
ensure the correct visibility ordering of the 2 writes.

This workaround sets a bit in the diagnostic register of the Cortex-A9,
causing the DMB instruction to behave like a DSB, which functions
correctly on the affected cores.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

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