diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c
index 17bae9c14ca0..6cd44d3cf906 100644
--- a/drivers/md/bcache/sysfs.c
+++ b/drivers/md/bcache/sysfs.c
@@ -996,8 +996,6 @@ SHOW(__bch_cache)
 		       !cached[n - 1])
 			--n;
 
-		unused = ca->sb.nbuckets - n;
-
 		while (cached < p + n &&
 		       *cached == BTREE_PRIO)
 			cached++, n--;