Chuang Xu <xuchuangxc...@bytedance.com> wrote:
> add rcu_read_is_locked() to detect holding of rcu lock.
>
> Signed-off-by: Chuang Xu <xuchuangxc...@bytedance.com>
Reviewed-by: Juan Quintela <quint...@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);
>
> /*
