linux-kernel - [PATCH v2 04/21] KFENCE: cleanup kfence_guarded_alloc() after CONFIG

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Message-Id: <20231120-slab-remove-slab-v2-4-9c9c70177183@suse.cz>
Date:   Mon, 20 Nov 2023 19:34:15 +0100
From:   Vlastimil Babka <vbabka@...e.cz>
To:     David Rientjes <rientjes@...gle.com>,
        Christoph Lameter <cl@...ux.com>,
        Pekka Enberg <penberg@...nel.org>,
        Joonsoo Kim <iamjoonsoo.kim@....com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Hyeonggon Yoo <42.hyeyoo@...il.com>,
        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,
        Vlastimil Babka <vbabka@...e.cz>
Subject: [PATCH v2 04/21] KFENCE: cleanup kfence_guarded_alloc() after
 CONFIG_SLAB removal

Some struct slab fields are initialized differently for SLAB and SLUB so
we can simplify with SLUB being the only remaining allocator.

Reviewed-by: Kees Cook <keescook@...omium.org>
Reviewed-by: Marco Elver <elver@...gle.com>
Signed-off-by: Vlastimil Babka <vbabka@...e.cz>
---
 mm/kfence/core.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/mm/kfence/core.c b/mm/kfence/core.c
index 3872528d0963..8350f5c06f2e 100644
--- a/mm/kfence/core.c
+++ b/mm/kfence/core.c
@@ -463,11 +463,7 @@ static void *kfence_guarded_alloc(struct kmem_cache *cache, size_t size, gfp_t g
 	/* Set required slab fields. */
 	slab = virt_to_slab((void *)meta->addr);
 	slab->slab_cache = cache;
-#if defined(CONFIG_SLUB)
 	slab->objects = 1;
-#elif defined(CONFIG_SLAB)
-	slab->s_mem = addr;
-#endif
 
 	/* Memory initialization. */
 	set_canary(meta);

-- 
2.42.1