linux-kernel - [PATCH 03/11] xen/gntdev: add VM

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Message-Id: <1292420446-3348-3-git-send-email-stefano.stabellini@eu.citrix.com>
Date:	Wed, 15 Dec 2010 13:40:38 +0000
From:	stefano.stabellini@...citrix.com
To:	linux-kernel@...r.kernel.org
Cc:	xen-devel@...ts.xensource.com,
	Jeremy Fitzhardinge <Jeremy.Fitzhardinge@...rix.com>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
Subject: [PATCH 03/11] xen/gntdev: add VM_PFNMAP to vma

From: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>

These pages are from other domains, so don't have any local PFN.
VM_PFNMAP is the closest concept Linux has to this.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
---
 drivers/xen/gntdev.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c
index 45898d4..cf61c7d 100644
--- a/drivers/xen/gntdev.c
+++ b/drivers/xen/gntdev.c
@@ -574,6 +574,7 @@ static int gntdev_mmap(struct file *flip, struct vm_area_struct *vma)
 	vma->vm_flags |= VM_RESERVED;
 	vma->vm_flags |= VM_DONTCOPY;
 	vma->vm_flags |= VM_DONTEXPAND;
+	vma->vm_flags |= VM_PFNMAP;
 
 	vma->vm_private_data = map;
 	map->vma = vma;
-- 
1.5.6.5

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