From 7e2ec6cfa0c831986c602f136b5c88ed4d252dfe Mon Sep 17 00:00:00 2001 From: Stefano Stabellini Date: Tue, 3 Apr 2012 18:05:47 +0100 Subject: xen/gntdev: do not set VM_PFNMAP commit e8e937be971d706061dc56220ff3605ab77622a7 upstream. 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. Signed-off-by: Stefano Stabellini Signed-off-by: Konrad Rzeszutek Wilk Signed-off-by: Greg Kroah-Hartman --- drivers/xen/gntdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/xen') diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c index f914b26..b4e830e 100644 --- a/drivers/xen/gntdev.c +++ b/drivers/xen/gntdev.c @@ -664,7 +664,7 @@ 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; -- cgit v1.1