linux-kernel - Re: [PATCH v4 2/6] fs: change ki_complete interface to support 64bit ret2

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Date:   Sun, 26 Jul 2020 16:18:19 +0100
From:   Christoph Hellwig <hch@...radead.org>
To:     Kanchan Joshi <joshi.k@...sung.com>
Cc:     axboe@...nel.dk, viro@...iv.linux.org.uk, bcrl@...ck.org,
        willy@...radead.org, hch@...radead.org, Damien.LeMoal@....com,
        asml.silence@...il.com, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-aio@...ck.org,
        io-uring@...r.kernel.org, linux-block@...r.kernel.org,
        linux-api@...r.kernel.org, SelvaKumar S <selvakuma.s1@...sung.com>,
        Nitesh Shetty <nj.shetty@...sung.com>,
        Javier Gonzalez <javier.gonz@...sung.com>
Subject: Re: [PATCH v4 2/6] fs: change ki_complete interface to support 64bit
 ret2

On Fri, Jul 24, 2020 at 09:19:18PM +0530, Kanchan Joshi wrote:
> From: SelvaKumar S <selvakuma.s1@...sung.com>
> 
> kiocb->ki_complete(...,long ret2) - change ret2 to long long.
> This becomes handy to return 64bit written-offset with appending write.
> Change callers using ki_complete prototype.

There is no need for this at all.  By the time ki_complete is called
ki_pos contains the new offset, and you just have to subtract res from
that.