bcache: Fix heap_peek() macro

Signed-off-by: Nicholas Swenson <nks@daterainc.com>
Signed-off-by: Kent Overstreet <kmo@daterainc.com>

diff --git a/drivers/md/bcache/util.h b/drivers/md/bcache/util.h
index 362c4b3..1030c60 100644 (file)
--- a/drivers/md/bcache/util.h
+++ b/drivers/md/bcache/util.h
@@ -110,7 +110,7 @@ do {                                                                        \
        _r;                                                             \
 })
 
-#define heap_peek(h)   ((h)->size ? (h)->data[0] : NULL)
+#define heap_peek(h)   ((h)->used ? (h)->data[0] : NULL)
 
 #define heap_full(h)   ((h)->used == (h)->size)