1 files changed, 13 insertions, 0 deletions

diff --git a/mm/slab.h b/mm/slab.h
index 1cb9c9ee0e6f..49e7a8b1d27e 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -100,4 +100,17 @@ void get_slabinfo(struct kmem_cache *s, struct slabinfo *sinfo);
 void slabinfo_show_stats(struct seq_file *m, struct kmem_cache *s);
 ssize_t slabinfo_write(struct file *file, const char __user *buffer,
                        size_t count, loff_t *ppos);
+
+#ifdef CONFIG_MEMCG_KMEM
+static inline bool is_root_cache(struct kmem_cache *s)
+{
+        return !s->memcg_params || s->memcg_params->is_root_cache;
+}
+#else
+static inline bool is_root_cache(struct kmem_cache *s)
+{
+        return true;
+}
+
+#endif
 #endif