tree 0939e0cabb626b4258e53a08f7a7713d534dfab5
parent 57efd44c8cad440fb00ef8078cb018ab2f221373
author Jens Freimann <jfrei@linux.vnet.ibm.com> 1340672398 +0000
committer David S. Miller <davem@davemloft.net> 1340770256 -0700

vhost: use USER_DS in vhost_worker thread

On some architectures address spaces are set up in a way that this is
not necessary to work properly but on some others (like s390) it is.
Make sure we operate on the user address space to allow copy_xxx_user()
from the vhost_worker() thread by setting it explicitly before calling
use_mm() and revert it after unuse_mm().

Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>