SLUB: fix build when !SLUB_DEBUG

Fix this build error when CONFIG_SLUB_DEBUG is not set:
mm/slub.c: In function 'slab_out_of_memory':
mm/slub.c:1551: error: 'struct kmem_cache_node' has no member named 'nr_slabs'
mm/slub.c:1552: error: 'struct kmem_cache_node' has no member named 'total_objects'

[ penberg@cs.helsinki.fi: cleanups ]
Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>

1 files changed, 19 insertions, 3 deletions

diff --git a/mm/slub.c b/mm/slub.c
index a5a4ecf7e393..9fb892b6afe3 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -832,6 +832,11 @@ static inline unsigned long slabs_node(struct kmem_cache *s, int node)
         return atomic_long_read(&n->nr_slabs);
 }
 
+static inline unsigned long node_nr_slabs(struct kmem_cache_node *n)
+{
+        return atomic_long_read(&n->nr_slabs);
+}
+
 static inline void inc_slabs_node(struct kmem_cache *s, int node, int objects)
 {
         struct kmem_cache_node *n = get_node(s, node);
@@ -1050,6 +1055,8 @@ static inline unsigned long kmem_cache_flags(unsigned long objsize,
 
 static inline unsigned long slabs_node(struct kmem_cache *s, int node)
                                                         { return 0; }
+static inline unsigned long node_nr_slabs(struct kmem_cache_node *n)
+                                                        { return 0; }
 static inline void inc_slabs_node(struct kmem_cache *s, int node,
                                                         int objects) {}
 static inline void dec_slabs_node(struct kmem_cache *s, int node,
@@ -1503,6 +1510,15 @@ static unsigned long count_partial(struct kmem_cache_node *n,
         return x;
 }
 
+static inline unsigned long node_nr_objs(struct kmem_cache_node *n)
+{
+#ifdef CONFIG_SLUB_DEBUG
+        return atomic_long_read(&n->total_objects);
+#else
+        return 0;
+#endif
+}
+
 static noinline void
 slab_out_of_memory(struct kmem_cache *s, gfp_t gfpflags, int nid)
 {
@@ -1524,9 +1540,9 @@ slab_out_of_memory(struct kmem_cache *s, gfp_t gfpflags, int nid)
                 if (!n)
                         continue;
 
-                nr_slabs = atomic_long_read(&n->nr_slabs);
-                nr_objs = atomic_long_read(&n->total_objects);
-                nr_free = count_partial(n, count_free);
+                nr_free  = count_partial(n, count_free);
+                nr_slabs = node_nr_slabs(n);
+                nr_objs  = node_nr_objs(n);
 
                 printk(KERN_WARNING
                         "  node %d: slabs: %ld, objs: %ld, free: %ld\n",