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| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2010-11-11 21:37:43 +0100 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2010-11-11 21:37:43 +0100 |
| commit | e060e7af98182494b764d002eba7fa022fe91bdf (patch) | |
| tree | 556b1a8c0d5cddf245c18bf220259691fb8f31d3 /drivers/xen/xenfs | |
| parent | xen: xenfs: privcmd: check put_user() return code (diff) | |
| download | linux-e060e7af98182494b764d002eba7fa022fe91bdf.tar.xz linux-e060e7af98182494b764d002eba7fa022fe91bdf.zip | |
xen: set vma flag VM_PFNMAP in the privcmd mmap file_op
Set VM_PFNMAP in the privcmd mmap file_op, rather than later in
xen_remap_domain_mfn_range when it is too late because
vma_wants_writenotify has already been called and vm_page_prot has
already been modified.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Diffstat (limited to 'drivers/xen/xenfs')
| -rw-r--r-- | drivers/xen/xenfs/privcmd.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/xen/xenfs/privcmd.c b/drivers/xen/xenfs/privcmd.c index 2eb04c842511..88474d460d82 100644 --- a/drivers/xen/xenfs/privcmd.c +++ b/drivers/xen/xenfs/privcmd.c @@ -380,8 +380,9 @@ static int privcmd_mmap(struct file *file, struct vm_area_struct *vma) if (xen_feature(XENFEAT_auto_translated_physmap)) return -ENOSYS; - /* DONTCOPY is essential for Xen as copy_page_range is broken. */ - vma->vm_flags |= VM_RESERVED | VM_IO | VM_DONTCOPY; + /* DONTCOPY is essential for Xen because copy_page_range doesn't know + * how to recreate these mappings */ + vma->vm_flags |= VM_RESERVED | VM_IO | VM_DONTCOPY | VM_PFNMAP; vma->vm_ops = &privcmd_vm_ops; vma->vm_private_data = NULL; |