linux-kernel - Re: [PATCH][next] io_uring: Remove logically dead code in io

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Message-ID: <ff734fe4-8b7f-739f-3876-45ebd1691880@embeddedor.com>
Date:   Mon, 4 May 2020 10:58:50 -0500
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Jens Axboe <axboe@...nel.dk>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Pavel Begunkov <asml.silence@...il.com>
Cc:     io-uring@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] io_uring: Remove logically dead code in io_splice



On 5/4/20 10:25, Jens Axboe wrote:
>> diff --git a/fs/io_uring.c b/fs/io_uring.c
>> index e5dfbbd2aa34..4b1efb062f7f 100644
>> --- a/fs/io_uring.c
>> +++ b/fs/io_uring.c
>> @@ -2782,7 +2782,7 @@ static int io_splice(struct io_kiocb *req, bool force_nonblock)
>>  	poff_in = (sp->off_in == -1) ? NULL : &sp->off_in;
>>  	poff_out = (sp->off_out == -1) ? NULL : &sp->off_out;
>>  	ret = do_splice(in, poff_in, out, poff_out, sp->len, flags);
>> -	if (force_nonblock && ret == -EAGAIN)
>> +	if (ret == -EAGAIN)
>>  		return -EAGAIN;
> 
> This isn't right, it should just remove the two lines completely. But
> also see:
> 
> https://lore.kernel.org/io-uring/529ea928-88a6-2cbe-ba8c-72b4c68cc7e8@kernel.dk/T/#u
> 

Oh, I see now. Thanks for the feedback.

--
Gustavo