block: Fix format string mismatch in cfq-iosched.c

Fix format string mismatch in cfq_var_show()

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 5063a0b..22dffeb 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -4460,7 +4460,7 @@
 static ssize_t
 cfq_var_show(unsigned int var, char *page)
 {
-	return sprintf(page, "%d\n", var);
+	return sprintf(page, "%u\n", var);
 }
 
 static ssize_t