linux-kernel - [PATCH v2 17/23] xen/arm: implement alloc/free_xenballooned_pages with alloc

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Message-ID: <1344263246-28036-17-git-send-email-stefano.stabellini@eu.citrix.com>
Date:	Mon, 6 Aug 2012 15:27:20 +0100
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	<linux-kernel@...r.kernel.org>
CC:	<xen-devel@...ts.xensource.com>,
	<Stefano.Stabellini@...citrix.com>, <konrad.wilk@...cle.com>,
	<Ian.Campbell@...rix.com>, <tim@....org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linaro-dev@...ts.linaro.org>, <catalin.marinas@....com>,
	<arnd@...db.de>,
	Stefano Stabellini <stefano.stabellini@...citrix.com>
Subject: [PATCH v2 17/23] 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 87b17f0..c244583 100644
--- a/arch/arm/xen/enlighten.c
+++ b/arch/arm/xen/enlighten.c
@@ -140,3 +140,21 @@ 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);
-- 
1.7.2.5

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