diff --git a/[refs] b/[refs]
index a5e1b24b8f26..44bd165d1b47 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7b30f09245d0e6868819b946b2f6879e5d3d106b
+refs/heads/master: ad01b1ca797e5898cd40bb32cf0dc8c85aa9f7e8
diff --git a/trunk/block/blktrace.c b/trunk/block/blktrace.c
index b8c0702777ff..265f7a830619 100644
--- a/trunk/block/blktrace.c
+++ b/trunk/block/blktrace.c
@@ -80,7 +80,7 @@ static u32 bio_act[5] __read_mostly = { 0, BLK_TC_ACT(BLK_TC_BARRIER), BLK_TC_AC
 #define trace_sync_bit(rw)	\
 	(((rw) & (1 << BIO_RW_SYNC)) >> (BIO_RW_SYNC - 1))
 #define trace_ahead_bit(rw)	\
-	(((rw) & (1 << BIO_RW_AHEAD)) << (BIO_RW_AHEAD - 0))
+	(((rw) & (1 << BIO_RW_AHEAD)) << (2 - BIO_RW_AHEAD))
 
 /*
  * The worker for the various blk_add_trace*() types. Fills out a