Re: [RFC v5 1/3] rcu: introduce rcu_read_is_locked()

[Chuang Xu]

Hi, Paolo!

On 2023/2/2 下午6:59, Juan Quintela wrote:
> Chuang Xu <xuchuangxclwt@bytedance.com> wrote:
> > add rcu_read_is_locked() to detect holding of rcu lock.
> >
> > Signed-off-by: Chuang Xu <xuchuangxclwt@bytedance.com>
> Reviewed-by: Juan Quintela <quintela@redhat.com>
>
> Althought I think that petting a review from Paolo or anyone that knows
> more than RCU could be a good idea.
>
> > ---
> >   include/qemu/rcu.h | 7 +++++++
> >   1 file changed, 7 insertions(+)
> >
> > diff --git a/include/qemu/rcu.h b/include/qemu/rcu.h
> > index b063c6fde8..719916d9d3 100644
> > --- a/include/qemu/rcu.h
> > +++ b/include/qemu/rcu.h
> > @@ -119,6 +119,13 @@ static inline void rcu_read_unlock(void)
> >       }
> >   }
> >   
> > +static inline bool rcu_read_is_locked(void)
> > +{
> > +    struct rcu_reader_data *p_rcu_reader = get_ptr_rcu_reader();
> > +
> > +    return p_rcu_reader->depth > 0;
> > +}
> > +
> >   extern void synchronize_rcu(void);
> >   
> >   /*

Do you have any more suggestions about patch1?

Looking forward to your reply.

Thanks！