linux-hardening - Re: [PATCH v2 05/21] mm/memcontrol: remove CONFIG

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Date: Wed, 6 Dec 2023 17:12:58 +0900
From: Hyeonggon Yoo <42.hyeyoo@...il.com>
To: Vlastimil Babka <vbabka@...e.cz>
Cc: David Rientjes <rientjes@...gle.com>, Christoph Lameter <cl@...ux.com>,
	Pekka Enberg <penberg@...nel.org>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Roman Gushchin <roman.gushchin@...ux.dev>,
	Andrey Ryabinin <ryabinin.a.a@...il.com>,
	Alexander Potapenko <glider@...gle.com>,
	Andrey Konovalov <andreyknvl@...il.com>,
	Dmitry Vyukov <dvyukov@...gle.com>,
	Vincenzo Frascino <vincenzo.frascino@....com>,
	Marco Elver <elver@...gle.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Michal Hocko <mhocko@...nel.org>,
	Shakeel Butt <shakeelb@...gle.com>,
	Muchun Song <muchun.song@...ux.dev>,
	Kees Cook <keescook@...omium.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, kasan-dev@...glegroups.com,
	cgroups@...r.kernel.org, linux-hardening@...r.kernel.org,
	Michal Hocko <mhocko@...e.com>
Subject: Re: [PATCH v2 05/21] mm/memcontrol: remove CONFIG_SLAB #ifdef guards

On Mon, Nov 20, 2023 at 07:34:16PM +0100, Vlastimil Babka wrote:
> With SLAB removed, these are never true anymore so we can clean up.
> 
> Reviewed-by: Kees Cook <keescook@...omium.org>
> Acked-by: Michal Hocko <mhocko@...e.com>
> Signed-off-by: Vlastimil Babka <vbabka@...e.cz>
> ---
>  mm/memcontrol.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index 774bd6e21e27..947fb50eba31 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -5149,7 +5149,7 @@ static ssize_t memcg_write_event_control(struct kernfs_open_file *of,
>  	return ret;
>  }
>  
> -#if defined(CONFIG_MEMCG_KMEM) && (defined(CONFIG_SLAB) || defined(CONFIG_SLUB_DEBUG))
> +#if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_SLUB_DEBUG)
>  static int mem_cgroup_slab_show(struct seq_file *m, void *p)
>  {
>  	/*
> @@ -5258,8 +5258,7 @@ static struct cftype mem_cgroup_legacy_files[] = {
>  		.write = mem_cgroup_reset,
>  		.read_u64 = mem_cgroup_read_u64,
>  	},
> -#if defined(CONFIG_MEMCG_KMEM) && \
> -	(defined(CONFIG_SLAB) || defined(CONFIG_SLUB_DEBUG))
> +#if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_SLUB_DEBUG)
>  	{
>  		.name = "kmem.slabinfo",
>  		.seq_show = mem_cgroup_slab_show,

Looks good to me,
Reviewed-by: Hyeonggon Yoo <42.hyeyoo@...il.com>

> 
> -- 
> 2.42.1
> 
>