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Re: [RFC v5 1/3] rcu: introduce rcu_read_is_locked()
From: |
Juan Quintela |
Subject: |
Re: [RFC v5 1/3] rcu: introduce rcu_read_is_locked() |
Date: |
Thu, 02 Feb 2023 11:59:05 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) |
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);
>
> /*
- Re: [RFC v5 1/3] rcu: introduce rcu_read_is_locked(),
Juan Quintela <=