On Wed Feb 18 2015 10:29:40 AM CET, Jan Beulich <jbeul...@suse.com> wrote:
> > > > On 17.02.15 at 19:47, <tamas.leng...@zentific.com> wrote:
> > On Tue, Feb 17, 2015 at 3:25 PM, Jan Beulich <jbeul...@suse.com> wrote:
> > > > > > On 13.02.15 at 17:33, <tamas.leng...@zentific.com> wrote:
> > > > -int mem_paging_memop(struct domain *d, xen_mem_paging_op_t *mpo)
> > > > +int mem_paging_memop(unsigned long cmd,
> > > > +
> > > > XEN_GUEST_HANDLE_PARAM(xen_mem_paging_op_t)
> > > > arg) {
> > > > - int rc = -ENODEV;
> > > > + int rc;
> > > > + xen_mem_paging_op_t mpo;
> > > > + struct domain *d;
> > > > +
> > > > + rc = -EFAULT;
> > > > + if ( copy_from_guest(&mpo, arg, 1) )
> > > > + return rc;
> > >
> > > Please don't make things more complicated than they need to be:
> > > You only use the -EFAULT once here, so no reason to assign it to
> > > rc up front.
> >
> > This return will be a "goto out;" where the rcu is getting unlocked as
> > well.
>
> How that? You didn't take the RCU lock yet (which is even visible
> from the rest of the hunk above).
>
> Jan
Sorry, was just replying mechanically as most returns here turn into goto outs.
Ack.
Tamas
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