diff mbox series

[01/15] cdrom: Remove now superfluous sentinel element from ctl_table array

Message ID 20230928-jag-sysctl_remove_empty_elem_drivers-v1-1-e59120fca9f9@samsung.com (mailing list archive)
State Not Applicable
Headers show
Series [01/15] cdrom: Remove now superfluous sentinel element from ctl_table array | expand

Commit Message

Joel Granados via B4 Relay Sept. 28, 2023, 1:21 p.m. UTC
From: Joel Granados <j.granados@samsung.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@samsung.com>
---
 drivers/cdrom/cdrom.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

Comments

Greg KH Sept. 28, 2023, 1:36 p.m. UTC | #1
On Thu, Sep 28, 2023 at 03:21:26PM +0200, Joel Granados via B4 Relay wrote:
> From: Joel Granados <j.granados@samsung.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@samsung.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.

So your patches will just remove one line, not 2 and add 1, making it a
smaller diff.

thanks,

greg k-h
Joel Granados Sept. 29, 2023, 12:17 p.m. UTC | #2
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@samsung.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@samsung.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
Phillip Potter Sept. 30, 2023, 4:52 p.m. UTC | #3
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@samsung.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@samsung.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
Joel Granados Oct. 2, 2023, 7:39 a.m. UTC | #4
On Sat, Sep 30, 2023 at 05:52:17PM +0100, Phillip Potter wrote:
> 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@samsung.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@samsung.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.
Am following a reported oops. Once I straighten that out, I'll send out
a V2

Bet

> 
> Regards,
> Phil
diff mbox series

Patch

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
-	},
-	{ }
+	}
 };
 static struct ctl_table_header *cdrom_sysctl_header;