linux-kernel - [PATCH WIP 3/5] xen/arm: implement alloc/free_xenballooned_pages with alloc

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Date:	Wed, 4 Jul 2012 12:15:18 +0100
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	xen-devel@...ts.xensource.com
CC:	linux-kernel@...r.kernel.org, stefano.stabellini@...citrix.com,
	Ian.Campbell@...rix.com, david.vrabel@...rix.com
Subject: [PATCH WIP 3/5] 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@...citrix.com>
---
 arch/arm/xen/enlighten.c |   18 ++++++++++++++++++
 1 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
index a6dc9eb..924c9aa 100644
--- a/arch/arm/xen/enlighten.c
+++ b/arch/arm/xen/enlighten.c
@@ -199,3 +199,21 @@ int __init xen_guest_init(void)
 	return 0;
 }
 EXPORT_SYMBOL(xen_guest_init);
+
+/* 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(alloc_xenballooned_pages);
+
+void free_xenballooned_pages(int nr_pages, struct page **pages)
+{
+	kfree(*pages);
+	*pages = NULL;
+}
+EXPORT_SYMBOL(free_xenballooned_pages);
-- 
1.7.2.5

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