linux-kernel - Re: [PATCH] block: fix returnvar.cocci warnings

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Message-ID: <55667106.9000000@redhat.com>
Date:	Wed, 27 May 2015 21:36:06 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Julia Lawall <julia.lawall@...6.fr>, Christoph Hellwig <hch@....de>
CC:	Jens Axboe <axboe@...nel.dk>, Jeff Moyer <jmoyer@...hat.com>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] block: fix returnvar.cocci warnings

On 05/26/2015 03:59 PM, Julia Lawall wrote:
> Remove unneeded variable used to store return value.
> 
> Generated by: scripts/coccinelle/misc/returnvar.cocci
> 
> Signed-off-by: Fengguang Wu <fengguang.wu@...el.com>
> Signed-off-by: Julia Lawall <julia.lawall@...6.fr>
> ---
> 
> One could check whether the ret variable was intended to be used for 
> anything.

Which tree is this against?

Linus's latest tree still has this in _submit_bh
(unless git didn't pull the latest updates right):

        if (buffer_meta(bh))
                rw |= REQ_META;
        if (buffer_prio(bh))
                rw |= REQ_PRIO;

        bio_get(bio);
        submit_bio(rw, bio);

        if (bio_flagged(bio, BIO_EOPNOTSUPP))
                ret = -EOPNOTSUPP;

        bio_put(bio);
        return ret;
}

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