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| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2012-04-03 18:05:47 +0100 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-04-17 13:27:17 -0400 |
| commit | e8e937be971d706061dc56220ff3605ab77622a7 (patch) | |
| tree | 749380e841f6a07ffd5d9678fb88f008afd7f2ba /drivers/xen | |
| parent | 6b5e7d9ef793c55d72679f058514f33c4258f286 (diff) | |
| download | lwn-e8e937be971d706061dc56220ff3605ab77622a7.tar.gz lwn-e8e937be971d706061dc56220ff3605ab77622a7.zip | |
xen/gntdev: do not set VM_PFNMAP
Since we are using the m2p_override we do have struct pages
corresponding to the user vma mmap'ed by gntdev.
Removing the VM_PFNMAP flag makes get_user_pages work on that vma.
An example test case would be using a Xen userspace block backend
(QDISK) on a file on NFS using O_DIRECT.
CC: stable@kernel.org
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/xen')
| -rw-r--r-- | drivers/xen/gntdev.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c index 99d8151c824a..1ffd03bf8e10 100644 --- a/drivers/xen/gntdev.c +++ b/drivers/xen/gntdev.c @@ -722,7 +722,7 @@ static int gntdev_mmap(struct file *flip, struct vm_area_struct *vma) vma->vm_flags |= VM_RESERVED|VM_DONTEXPAND; if (use_ptemod) - vma->vm_flags |= VM_DONTCOPY|VM_PFNMAP; + vma->vm_flags |= VM_DONTCOPY; vma->vm_private_data = map; |