linux-hardening - [PATCH V2] mm/slab: remove unused slab_early

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Message-Id: <20221218123127.23810-1-gouhao@uniontech.com>
Date:   Sun, 18 Dec 2022 20:31:27 +0800
From:   gouhao@...ontech.com
To:     cl@...ux.com, penberg@...nel.org, rientjes@...gle.com,
        iamjoonsoo.kim@....com, akpm@...ux-foundation.org, vbabka@...e.cz,
        roman.gushchin@...ux.dev, 42.hyeyoo@...il.com,
        keescook@...omium.org
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        linux-hardening@...r.kernel.org, mingo@...e.hu,
        Gou Hao <gouhao@...ontech.com>
Subject: [PATCH V2] mm/slab: remove unused slab_early_init

From: Gou Hao <gouhao@...ontech.com>

'slab_early_init' was introduced by 'commit e0a42726794f
("[PATCH] mm/slab.c: fix early init assumption")', this
flag was used to prevent off-slab caches being created
so early during bootup.

The only user of 'slab_early_init' was removed in 'commit
 3217fd9bdf00 ("mm/slab: make criteria for off slab
determination robust and simple")'.

Signed-off-by: Gou Hao <gouhao@...ontech.com>
Acked-by: Hyeonggon Yoo <42.hyeyoo@...il.com>
---
 mm/slab.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/mm/slab.c b/mm/slab.c
index 7a269db050ee..ede1f29fd81c 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -220,7 +220,6 @@ static inline void fixup_objfreelist_debug(struct kmem_cache *cachep,
 static inline void fixup_slab_list(struct kmem_cache *cachep,
 				struct kmem_cache_node *n, struct slab *slab,
 				void **list);
-static int slab_early_init = 1;
 
 #define INDEX_NODE kmalloc_index(sizeof(struct kmem_cache_node))
 
@@ -1249,8 +1248,6 @@ void __init kmem_cache_init(void)
 	slab_state = PARTIAL_NODE;
 	setup_kmalloc_cache_index_table();
 
-	slab_early_init = 0;
-
 	/* 5) Replace the bootstrap kmem_cache_node */
 	{
 		int nid;
-- 
2.20.1