linux-kernel - RE: [PATCH 1/3] Fix ERROR: trailing statements should be on next line

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Date:   Mon, 15 May 2017 14:25:40 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Alex Williamson' <alex.williamson@...hat.com>,
        "Michael S. Tsirkin" <mst@...hat.com>
CC:     Maciek Fijalkowski <macfij7@...pl>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "virtualization@...ts.linux-foundation.org" 
        <virtualization@...ts.linux-foundation.org>
Subject: RE: [PATCH 1/3] Fix ERROR: trailing statements should be on next
 line

From: Alex Williamson
> Sent: 15 May 2017 04:21
...
> > >  	/* Find end of list, sew whole thing into vi->rq.pages. */
> > > -	for (end = page; end->private; end = (struct page *)end->private);
> > > +	for (end = page; end->private; end = (struct page *)end->private)
> > > +		;
> 
> FWIW, I generally like to put a comment on the next line to make it
> abundantly clear that there's nothing in the body of the loop, it's
> also more aesthetically pleasing than a semi-colon on the line by
> itself, ex. /* Nothing */;  It's just too easy to misinterpret the
> loop otherwise, especially without gratuitous white space.  Thanks,

My preference is to put 'continue;' on a line by itself.
Or even move the termination condition into the loop:
	for (end = page;; end = (struct page *)end->private)
		if (!end->private)
			break;

(oh, is that cast needed??)

	David