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-rw-r--r--btt/unplug_hist.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/btt/unplug_hist.c b/btt/unplug_hist.c
index 4971f31..aaa4c39 100644
--- a/btt/unplug_hist.c
+++ b/btt/unplug_hist.c
@@ -23,7 +23,7 @@
#define BKT_WIDTH 5
#define MAX_BKT 19
#define EXCESS_BKT 20
-#define NBKTS EXCESS_BKT
+#define NBKTS (EXCESS_BKT + 1)
struct hist_bkt {
__u32 dev;
@@ -56,7 +56,7 @@ void unplug_hist_add(struct io *u_iop)
struct hist_bkt *hbp = dip->unplug_hist_handle;
idx = (n_unplugs / BKT_WIDTH);
- if (idx > MAX_BKT)
+ if (idx > EXCESS_BKT)
idx = EXCESS_BKT;
assert((0 <= idx) && (idx <= EXCESS_BKT));