Subject: Re: [PATCH v4 25/42] vhost: add memory access wrappers

From: "Michael S. Tsirkin" <[email-masked]>
Date: Wed, 26 Nov 2014 16:05:39 +0200

On Wed, Nov 26, 2014 at 02:54:38PM +0100, Cornelia Huck wrote:
> On Tue, 25 Nov 2014 18:43:10 +0200
> "Michael S. Tsirkin" <[email-masked]> wrote:
> 
> "These wrappers are needed to handle virtio endianness conversions."
> 
> ?

yes, it's same as virtio ones. I'll add this text, thanks.

> > Signed-off-by: Michael S. Tsirkin <[email-masked]>
> > ---
> >  drivers/vhost/vhost.h | 33 ++++++++++++++++++++++++++++++++-
> >  1 file changed, 32 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
> > index 3eda654..b9032e8 100644
> > --- a/drivers/vhost/vhost.h
> > +++ b/drivers/vhost/vhost.h
> > @@ -174,6 +174,37 @@ enum {
> > 
> >  static inline int vhost_has_feature(struct vhost_virtqueue *vq, int bit)
> >  {
> > -	return vq->acked_features & (1 << bit);
> > +	return vq->acked_features & (1ULL << bit);
> 
> Should this hunk go into patch 28?

Well, this is needed here since 1 << 32 is not legal C.

I can move it - this means patch 28 will have to move earlier
in series though.

> > +}