From: Scott Wood <scottwood@freescale.com>
Date: Fri, 8 Aug 2014 23:40:44 +0000 (-0500)
Subject: powerpc/64: Limit ZONE_DMA32 to 4GiB in swiotlb_detect_4g()
X-Git-Tag: fixes-against-v3.18-rc2~117^2~22^2~24
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cf5621032fbe7354c0c3fff17958b7029bbc9f30;p=pandora-kernel.git

powerpc/64: Limit ZONE_DMA32 to 4GiB in swiotlb_detect_4g()

A DMA zone is still needed with swiotlb, for coherent allocations.
This doesn't affect platforms that don't use swiotlb or that don't call
swiotlb_detect_4g().

Signed-off-by: Scott Wood <scottwood@freescale.com>
Cc: Shaohui Xie <Shaohui.Xie@freescale.com>
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