On Fri, 8 Feb 2019 16:26:06 -0500 Eric Farman <farman@xxxxxxxxxxxxx> wrote: > On 01/30/2019 08:22 AM, Cornelia Huck wrote: > > Introduce a mutex to disallow concurrent reads or writes to the > > I/O region. This makes sure that the data the kernel or user > > space see is always consistent. > > > > The same mutex will be used to protect the async region as well. > > > > Signed-off-by: Cornelia Huck <cohuck@xxxxxxxxxx> > > I keep wondering how the FSM could provide this, but I end up getting > into chicken/egg rabbit holes. Yes, if the fsm is able to provide this, it is probably not in an easy-to-understand way... > So, until my brain becomes wiser... > > Reviewed-by: Eric Farman <farman@xxxxxxxxxxxxx> Thanks! > > > --- > > drivers/s390/cio/vfio_ccw_drv.c | 3 +++ > > drivers/s390/cio/vfio_ccw_ops.c | 28 +++++++++++++++++++--------- > > drivers/s390/cio/vfio_ccw_private.h | 2 ++ > > 3 files changed, 24 insertions(+), 9 deletions(-)
