[Xen-devel] [PATCH 03/11] xen/gntdev: add VM_PFNMAP to vma

[stefano.stabellini@xxxxxxxxxxxxx]

From: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>

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@xxxxxxxxxx>
---
 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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