linux-kernel - Re: [PATCH 01/15] cdrom: Remove now superfluous sentinel element from ctl

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Date:   Sat, 30 Sep 2023 17:52:17 +0100
From:   Phillip Potter <phil@...lpotter.co.uk>
To:     Joel Granados <j.granados@...sung.com>
Cc:     Luis Chamberlain <mcgrof@...nel.org>, willy@...radead.org,
        josh@...htriplett.org, Kees Cook <keescook@...omium.org>,
        Clemens Ladisch <clemens@...isch.de>,
        Arnd Bergmann <arnd@...db.de>, Juergen Gross <jgross@...e.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Oleksandr Tyshchenko <oleksandr_tyshchenko@...m.com>,
        Jiri Slaby <jirislaby@...nel.org>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Doug Gilbert <dgilbert@...erlog.com>,
        Sudip Mukherjee <sudipm.mukherjee@...il.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Leon Romanovsky <leon@...nel.org>,
        Corey Minyard <minyard@....org>, Theodore Ts'o <tytso@....edu>,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        David Ahern <dsahern@...nel.org>,
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        Song Liu <song@...nel.org>,
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        Haiyang Zhang <haiyangz@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>, linux-kernel@...r.kernel.org,
        xen-devel@...ts.xenproject.org, linux-serial@...r.kernel.org,
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        linux-rdma@...r.kernel.org,
        openipmi-developer@...ts.sourceforge.net, netdev@...r.kernel.org,
        linux-raid@...r.kernel.org, linux-hyperv@...r.kernel.org,
        intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH 01/15] cdrom: Remove now superfluous sentinel element
 from ctl_table array

On Fri, Sep 29, 2023 at 02:17:30PM +0200, Joel Granados wrote:
> On Thu, Sep 28, 2023 at 03:36:55PM +0200, Greg Kroah-Hartman wrote:
> > On Thu, Sep 28, 2023 at 03:21:26PM +0200, Joel Granados via B4 Relay wrote:
> > > From: Joel Granados <j.granados@...sung.com>
> > > 
> > > This commit comes at the tail end of a greater effort to remove the
> > > empty elements at the end of the ctl_table arrays (sentinels) which
> > > will reduce the overall build time size of the kernel and run time
> > > memory bloat by ~64 bytes per sentinel (further information Link :
> > > https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/)
> > > 
> > > Remove sentinel element from cdrom_table
> > > 
> > > Signed-off-by: Joel Granados <j.granados@...sung.com>
> > > ---
> > >  drivers/cdrom/cdrom.c | 3 +--
> > >  1 file changed, 1 insertion(+), 2 deletions(-)
> > > 
> > > diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
> > > index cc2839805983..451907ade389 100644
> > > --- a/drivers/cdrom/cdrom.c
> > > +++ b/drivers/cdrom/cdrom.c
> > > @@ -3654,8 +3654,7 @@ static struct ctl_table cdrom_table[] = {
> > >  		.maxlen		= sizeof(int),
> > >  		.mode		= 0644,
> > >  		.proc_handler	= cdrom_sysctl_handler
> > > -	},
> > > -	{ }
> > > +	}
> > 
> > You should have the final entry as "}," so as to make any future
> > additions to the list to only contain that entry, that's long been the
> > kernel style for lists like this.
> Will send a V2 with this included. Thx.
> 
> > 
> > So your patches will just remove one line, not 2 and add 1, making it a
> > smaller diff.
> indeed.
> 
> > 
> > thanks,
> > 
> > greg k-h
> 
> -- 
> 
> Joel Granados

Hi Joel,

Thank you for your patch. I look forward to seeing V2, and will be happy
to review it.

Regards,
Phil