From: Marc Zyngier <Marc.Zyngier@arm.com>
Date: Fri, 21 Jun 2013 11:07:27 +0000 (+0100)
Subject: ARM: 7769/1: Cortex-A15: fix erratum 798181 implementation
X-Git-Tag: omap-for-v3.11/fixes-for-merge-window~41^2~1^3~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0d0752bca1f9a91fb646647aa4abbb21156f316c;p=pandora-kernel.git

ARM: 7769/1: Cortex-A15: fix erratum 798181 implementation

Looking into the active_asids array is not enough, as we also need
to look into the reserved_asids array (they both represent processes
that are currently running).

Also, not holding the ASID allocator lock is racy, as another CPU
could schedule that process and trigger a rollover, making the erratum
workaround miss an IPI.

Exposing this outside of context.c is a little ugly on the side, so
let's define a new entry point that the erratum workaround can call
to obtain the cpumask.

Cc: <stable@vger.kernel.org> # 3.9
Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

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