From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Date: Wed, 8 Aug 2012 17:20:58 +0000 (+0000)
Subject: xen/arm: implement alloc/free_xenballooned_pages with alloc_pages/kfree
X-Git-Tag: upstream/snapshot3+hdmi~6229^2~38^2~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ea54209b16cbecad8928f6067af29069ac44e360;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

xen/arm: implement alloc/free_xenballooned_pages with alloc_pages/kfree

Only until we get the balloon driver to work.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---

diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
index bad67ad..59bcb96 100644
--- a/arch/arm/xen/enlighten.c
+++ b/arch/arm/xen/enlighten.c
@@ -148,3 +148,21 @@ static int __init xen_init_events(void)
 	return 0;
 }
 postcore_initcall(xen_init_events);
+
+/* XXX: only until balloon is properly working */
+int alloc_xenballooned_pages(int nr_pages, struct page **pages, bool highmem)
+{
+	*pages = alloc_pages(highmem ? GFP_HIGHUSER : GFP_KERNEL,
+			get_order(nr_pages));
+	if (*pages == NULL)
+		return -ENOMEM;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(alloc_xenballooned_pages);
+
+void free_xenballooned_pages(int nr_pages, struct page **pages)
+{
+	kfree(*pages);
+	*pages = NULL;
+}
+EXPORT_SYMBOL_GPL(free_xenballooned_pages);