@@ -541,7 +541,7 @@ struct cache_set {
 	struct bio_set		bio_split;
 
 	/* For the btree cache */
-	struct shrinker		shrink;
+	struct shrinker		*shrink;
 
 	/* For the btree cache and anything allocation related */
 	struct mutex		bucket_lock;

@@ -667,7 +667,7 @@ static int mca_reap(struct btree *b, unsigned int min_order, bool flush)
 static unsigned long bch_mca_scan(struct shrinker *shrink,
 				  struct shrink_control *sc)
 {
-	struct cache_set *c = container_of(shrink, struct cache_set, shrink);
+	struct cache_set *c = shrink->private_data;
 	struct btree *b, *t;
 	unsigned long i, nr = sc->nr_to_scan;
 	unsigned long freed = 0;

@@ -734,7 +734,7 @@ static unsigned long bch_mca_scan(struct shrinker *shrink,
 static unsigned long bch_mca_count(struct shrinker *shrink,
 				   struct shrink_control *sc)
 {
-	struct cache_set *c = container_of(shrink, struct cache_set, shrink);
+	struct cache_set *c = shrink->private_data;
 
 	if (c->shrinker_disabled)
 		return 0;

@@ -752,8 +752,8 @@ void bch_btree_cache_free(struct cache_set *c)
 
 	closure_init_stack(&cl);
 
-	if (c->shrink.list.next)
-		unregister_shrinker(&c->shrink);
+	if (c->shrink->list.next)
+		unregister_and_free_shrinker(c->shrink);
 
 	mutex_lock(&c->bucket_lock);
 

@@ -828,14 +828,19 @@ int bch_btree_cache_alloc(struct cache_set *c)
 		c->verify_data = NULL;
 #endif
 
-	c->shrink.count_objects = bch_mca_count;
-	c->shrink.scan_objects = bch_mca_scan;
-	c->shrink.seeks = 4;
-	c->shrink.batch = c->btree_pages * 2;
+	c->shrink = shrinker_alloc_and_init(bch_mca_count, bch_mca_scan,
+					    c->btree_pages * 2, 4, 0, c);
+	if (!c->shrink) {
+		pr_warn("bcache: %s: could not allocate shrinker\n",
+				__func__);
+		return -ENOMEM;
+	}
 
-	if (register_shrinker(&c->shrink, "md-bcache:%pU", c->set_uuid))
+	if (register_shrinker(c->shrink, "md-bcache:%pU", c->set_uuid)) {
 		pr_warn("bcache: %s: could not register shrinker\n",
 				__func__);
+		shrinker_free(c->shrink);
+	}
 
 	return 0;
 }

@@ -866,7 +866,7 @@ STORE(__bch_cache_set)
 
 		sc.gfp_mask = GFP_KERNEL;
 		sc.nr_to_scan = strtoul_or_return(buf);
-		c->shrink.scan_objects(&c->shrink, &sc);
+		c->shrink->scan_objects(c->shrink, &sc);
 	}
 
 	sysfs_strtoul_clamp(congested_read_threshold_us,