[v4,17/24] xen/arm: implement alloc/free_xenballooned_pages with alloc_pages/kfree

Commit Message

Stefano Stabellini Sept. 14, 2012, 11:13 a.m. UTC

Only until we get the balloon driver to work.

Signed-off-by: Stefano Stabellini <[e-mail]>
Acked-by: Konrad Rzeszutek Wilk <[e-mail]>
---
 arch/arm/xen/enlighten.c |   18 ++++++++++++++++++
 1 files changed, 18 insertions(+), 0 deletions(-)

Patch

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);