linux-kernel - Re: [PATCH 2/2] fs: Remove kiocb->ki

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Message-ID: <33e0220c-242d-1856-9d4e-31528011a06e@kernel.dk>
Date:   Wed, 8 Jul 2020 16:38:51 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     "Matthew Wilcox (Oracle)" <willy@...radead.org>
Cc:     linux-block@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-aio@...ck.org, io-uring@...r.kernel.org,
        linux-kernel@...r.kernel.org, Kanchan Joshi <joshi.k@...sung.com>,
        Javier Gonzalez <javier.gonz@...sung.com>
Subject: Re: [PATCH 2/2] fs: Remove kiocb->ki_complete

On 7/8/20 4:26 PM, Matthew Wilcox (Oracle) wrote:
> @@ -341,12 +343,25 @@ struct kiocb {
>  	randomized_struct_fields_end
>  };
>  
> +static inline int kiocb_completion_id(struct kiocb *kiocb)
> +{
> +	return kiocb->ki_flags >> _IOCB_COMPLETION_SHIFT;
> +}
> +
> +static inline void kiocb_set_completion(struct kiocb *kiocb, int id)
> +{
> +	kiocb->ki_flags = (kiocb->ki_flags & (~IOCB_COMPLETION_FNS)) |
> +				(id << _IOCB_COMPLETION_SHIFT);
> +}
> +
>  static inline bool is_sync_kiocb(struct kiocb *kiocb)
>  {
> -	return kiocb->ki_complete == NULL;
> +	return kiocb_completion_id(kiocb) == 0;
>  }
>  
>  void complete_kiocb(struct kiocb *kiocb, long ret, long ret2);
> +int register_kiocb_completion(void (*)(struct kiocb *, long, long));
> +void unregister_kiocb_completion(int id);

Same here, you seem to mix and match whether you prefix with kiocb or
not. Why not make them all kiocb_*?

kiocb_register_completion() and so forth.

-- 
Jens Axboe