linux-kernel - Re: [PATCH v3 4/9] bus: fsl-mc: dpio: add frame descriptor and scatter/gather APIs

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Message-ID: <20161205205226.GB31322@mwanda>
Date:   Mon, 5 Dec 2016 23:52:26 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Laurentiu Tudor <laurentiu.tudor@....com>
Cc:     Stuart Yoder <stuart.yoder@....com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
        "agraf@...e.de" <agraf@...e.de>,
        Ruxandra Ioana Radulescu <ruxandra.radulescu@....com>,
        "arnd@...db.de" <arnd@...db.de>, Roy Pledge <roy.pledge@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Leo Li <leoyang.li@....com>,
        Catalin Horghidan <catalin.horghidan@....com>,
        Ioana Ciornei <ioana.ciornei@....com>
Subject: Re: [PATCH v3 4/9] bus: fsl-mc: dpio: add frame descriptor and
 scatter/gather APIs

On Fri, Dec 02, 2016 at 12:12:14PM +0000, Laurentiu Tudor wrote:
> > +static inline bool dpaa2_sg_is_final(const struct dpaa2_sg_entry *sg)
> > +{
> > +	return !!(le16_to_cpu(sg->format_offset) >> SG_FINAL_FLAG_SHIFT);
> 
> In other places in this file we don't use the '!!' to convert to bool. Maybe we should drop it here too.

I like the explicit "!!".  I think it makes the code more obvious since
all the information is on one line.

regards,
dan carpenter