linux-kernel - Re: [PATCH 8/9] dax: fix empty-body warnings in bus.c

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Date:   Sun, 19 Apr 2020 01:15:50 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     linux-kernel@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        linux-fsdevel@...r.kernel.org,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        linux-input@...r.kernel.org, Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org,
        "J. Bruce Fields" <bfields@...ldses.org>,
        Chuck Lever <chuck.lever@...cle.com>,
        linux-nfs@...r.kernel.org,
        Johannes Berg <johannes@...solutions.net>,
        Dan Williams <dan.j.williams@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Dave Jiang <dave.jiang@...el.com>, linux-nvdimm@...ts.01.org,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, target-devel@...r.kernel.org,
        Zzy Wysm <zzy@...wysm.com>
Subject: Re: [PATCH 8/9] dax: fix empty-body warnings in bus.c

On Sat, Apr 18, 2020 at 11:41:10AM -0700, Randy Dunlap wrote:
>  				rc = -ENOMEM;
>  		} else
> -			/* nothing to remove */;
> +			do_empty(); /* nothing to remove */
>  	} else if (action == ID_REMOVE) {
>  		list_del(&dax_id->list);
>  		kfree(dax_id);
>  	} else
> -		/* dax_id already added */;
> +		do_empty(); /* dax_id already added */

This is just nasty.  Please just always turn this bogus warning off
as the existing code is a perfectly readable idiom while the new code
is just nasty crap for no good reason at all.