linux-kernel - Re: [PATCH] mm: slub: make kobj

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Message-ID: <Y/X7nOeoORvNlclN@localhost>
Date:   Wed, 22 Feb 2023 11:25:16 +0000
From:   Hyeonggon Yoo <42.hyeyoo@...il.com>
To:     Thomas Weißschuh <linux@...ssschuh.net>
Cc:     Christoph Lameter <cl@...ux.com>,
        Pekka Enberg <penberg@...nel.org>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Roman Gushchin <roman.gushchin@...ux.dev>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: slub: make kobj_type structure constant

On Mon, Feb 20, 2023 at 11:25:28PM +0000, Thomas Weißschuh wrote:
> Since commit ee6d3dd4ed48 ("driver core: make kobj_type constant.")
> the driver core allows the usage of const struct kobj_type.
> 
> Take advantage of this to constify the structure definition to prevent
> modification at runtime.
> 
> Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
> ---
>  mm/slub.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/slub.c b/mm/slub.c
> index 13459c69095a..be710dc4dc3e 100644
> --- a/mm/slub.c
> +++ b/mm/slub.c
> @@ -6058,7 +6058,7 @@ static const struct sysfs_ops slab_sysfs_ops = {
>  	.store = slab_attr_store,
>  };
>  
> -static struct kobj_type slab_ktype = {
> +static const struct kobj_type slab_ktype = {
>  	.sysfs_ops = &slab_sysfs_ops,
>  	.release = kmem_cache_release,
>  };
> 
> ---

Acked-by: Hyeonggon Yoo <42.hyeyoo@...il.com>

Thanks!

> base-commit: 5b0ed5964928b0aaf0d644c17c886c7f5ea4bb3f
> change-id: 20230220-kobj_type-mm-slub-02d25836de84
> 
> Best regards,
> -- 
> Thomas Weißschuh <linux@...ssschuh.net>
>