From: David Vrabel <david.vrabel@citrix.com>
Date: Tue, 5 Aug 2014 10:49:19 +0000 (+0100)
Subject: x86/xen: use vmap() to map grant table pages in PVH guests
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~71^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7d951f3ccb0308c95bf76d5eef9886dea35a7013;p=pandora-kernel.git

x86/xen: use vmap() to map grant table pages in PVH guests

Commit b7dd0e350e0b (x86/xen: safely map and unmap grant frames when
in atomic context) causes PVH guests to crash in
arch_gnttab_map_shared() when they attempted to map the pages for the
grant table.

This use of a PV-specific function during the PVH grant table setup is
non-obvious and not needed.  The standard vmap() function does the
right thing.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reported-by: Mukesh Rathor <mukesh.rathor@oracle.com>
Tested-by: Mukesh Rathor <mukesh.rathor@oracle.com>
Cc: stable@vger.kernel.org
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