linux-hardening - [PATCH v2 15/21] mm/slab: move struct kmem_cache

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Message-Id: <20231120-slab-remove-slab-v2-15-9c9c70177183@suse.cz>
Date: Mon, 20 Nov 2023 19:34:26 +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 15/21] mm/slab: move struct kmem_cache_node from slab.h
 to slub.c

The declaration and associated helpers are not used anywhere else
anymore.

Reviewed-by: Kees Cook <keescook@...omium.org>
Signed-off-by: Vlastimil Babka <vbabka@...e.cz>
---
 mm/slab.h | 29 -----------------------------
 mm/slub.c | 27 +++++++++++++++++++++++++++
 2 files changed, 27 insertions(+), 29 deletions(-)

diff --git a/mm/slab.h b/mm/slab.h
index a81ef7c9282d..5ae6a978e9c2 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -588,35 +588,6 @@ static inline size_t slab_ksize(const struct kmem_cache *s)
 	return s->size;
 }
 
-
-/*
- * The slab lists for all objects.
- */
-struct kmem_cache_node {
-	spinlock_t list_lock;
-	unsigned long nr_partial;
-	struct list_head partial;
-#ifdef CONFIG_SLUB_DEBUG
-	atomic_long_t nr_slabs;
-	atomic_long_t total_objects;
-	struct list_head full;
-#endif
-};
-
-static inline struct kmem_cache_node *get_node(struct kmem_cache *s, int node)
-{
-	return s->node[node];
-}
-
-/*
- * Iterator over all nodes. The body will be executed for each node that has
- * a kmem_cache_node structure allocated (which is true for all online nodes)
- */
-#define for_each_kmem_cache_node(__s, __node, __n) \
-	for (__node = 0; __node < nr_node_ids; __node++) \
-		 if ((__n = get_node(__s, __node)))
-
-
 #ifdef CONFIG_SLUB_DEBUG
 void dump_unreclaimable_slab(void);
 #else
diff --git a/mm/slub.c b/mm/slub.c
index 844e0beb84ee..cc801f8258fe 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -396,6 +396,33 @@ static inline void stat(const struct kmem_cache *s, enum stat_item si)
 #endif
 }
 
+/*
+ * The slab lists for all objects.
+ */
+struct kmem_cache_node {
+	spinlock_t list_lock;
+	unsigned long nr_partial;
+	struct list_head partial;
+#ifdef CONFIG_SLUB_DEBUG
+	atomic_long_t nr_slabs;
+	atomic_long_t total_objects;
+	struct list_head full;
+#endif
+};
+
+static inline struct kmem_cache_node *get_node(struct kmem_cache *s, int node)
+{
+	return s->node[node];
+}
+
+/*
+ * Iterator over all nodes. The body will be executed for each node that has
+ * a kmem_cache_node structure allocated (which is true for all online nodes)
+ */
+#define for_each_kmem_cache_node(__s, __node, __n) \
+	for (__node = 0; __node < nr_node_ids; __node++) \
+		 if ((__n = get_node(__s, __node)))
+
 /*
  * Tracks for which NUMA nodes we have kmem_cache_nodes allocated.
  * Corresponds to node_state[N_NORMAL_MEMORY], but can temporarily

-- 
2.42.1