提交 e8e937be 编写于 作者: S Stefano Stabellini 提交者: Konrad Rzeszutek Wilk

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: NStefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
上级 6b5e7d9e
......@@ -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;
......
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