From: Michael Ellerman <michael@ellerman.id.au>
Date: Thu, 20 Sep 2012 22:08:28 +0000 (+0000)
Subject: powerpc: Remove tlb batching hack for nighthawk
X-Git-Tag: omap-for-v3.7-rc1/fixes-cpufreq-signed~10^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8e166991c0c3631b8af5a26990df77fa2a1d09e6;p=pandora-kernel.git

powerpc: Remove tlb batching hack for nighthawk

In hpte_init_native() we call tlb_batching_enabled() to decide if we
should setup ppc_md.flush_hash_range.

tlb_batching_enabled() checks the _unflattened_ device tree, to see
if we are running on a nighthawk.

Since commit a223535 ("dont allow pSeries_probe to succeed without
initialising MMU", Dec 2006), hpte_init_native() has been called from
pSeries_probe() - at which point we have not yet unflattened the
device tree.

This means tlb_batching_enabled() will always return true, so the hack
has effectively been disabled since Dec 2006. Ergo, I think we can
drop it.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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