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@chromium.org>
Acked-by: David Rientjes <rientjes@google.com>
Tested-by: David Rientjes <rientjes@google.com>
Reviewed-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Tested-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>

1 files changed, 27 insertions, 0 deletions

diff --git a/mm/slub.c b/mm/slub.c
index 844e0beb84ee..cc801f8258fe 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -397,6 +397,33 @@ static inline void stat(const struct kmem_cache *s, enum stat_item si)
 }
 
 /*
+ * 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
  * differ during memory hotplug/hotremove operations.