From: Ralf Baechle <ralf@linux-mips.org>
Date: Fri, 12 May 2006 12:20:06 +0000 (+0100)
Subject: [MIPS] Fix deadlock on MP with cache aliases.
X-Git-Tag: v2.6.17-rc6~57^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7f3f1d01a9020cff2cb2390aaee3f8df0d70e203;p=pandora-kernel.git

[MIPS] Fix deadlock on MP with cache aliases.

A proper fix would involve introducing the notion of shared caches but
at this stage of 2.6.17 that's going to be too intrusive and not needed
for current hardware; aside I think some discussion will be needed.

So for now on the affected SMP configurations which happen to suffer from
cache aliases we make use of the fact that a single cache will be shared
by all processors.  This solves the deadlock issue and will improve
performance by getting rid of the smp_call_function overhead.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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