From: Jennifer Herbert <jennifer.herbert@citrix.com>
Date: Wed, 24 Dec 2014 14:03:16 +0000 (+0000)
Subject: x86/xen: require ballooned pages for grant maps
X-Git-Tag: fixes-v4.0-rc1~162^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0ae65f49af64d68f0daca37b83383115cae5e690;p=pandora-kernel.git

x86/xen: require ballooned pages for grant maps

Ballooned pages are always used for grant maps which means the
original frame does not need to be saved in page->index nor restored
after the grant unmap.

This allows the workaround in netback for the conflicting use of the
(unionized) page->index and page->pfmemalloc to be removed.

Signed-off-by: Jennifer Herbert <jennifer.herbert@citrix.com>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
---

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