2 files changed, 3 insertions, 1 deletions

diff --git a/block/blk-barrier.c b/block/blk-barrier.c
index 7c6f4a714687..a3482425c507 100644
--- a/block/blk-barrier.c
+++ b/block/blk-barrier.c
@@ -143,7 +143,7 @@ static void queue_flush(struct request_queue *q, unsigned which)
         }
 
         blk_rq_init(q, rq);
-        rq->cmd_flags = REQ_HARDBARRIER;
+        rq->cmd_flags = REQ_HARDBARRIER | REQ_FLUSH;
         rq->rq_disk = q->bar_rq.rq_disk;
         rq->end_io = end_io;
         q->prepare_flush_fn(q, rq);
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 4d379c8250ae..f655b54c9ef3 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -174,6 +174,7 @@ enum rq_flag_bits {
         __REQ_ALLOCED,          /* request came from our alloc pool */
         __REQ_COPY_USER,        /* contains copies of user pages */
         __REQ_INTEGRITY,        /* integrity metadata has been remapped */
+        __REQ_FLUSH,            /* request for cache flush */
         __REQ_IO_STAT,          /* account I/O stat */
         __REQ_MIXED_MERGE,      /* merge of different types, fail separately */
         __REQ_NR_BITS,          /* stops here */
@@ -213,6 +214,7 @@ enum rq_flag_bits {
 #define REQ_ALLOCED             (1 << __REQ_ALLOCED)
 #define REQ_COPY_USER           (1 << __REQ_COPY_USER)
 #define REQ_INTEGRITY           (1 << __REQ_INTEGRITY)
+#define REQ_FLUSH               (1 << __REQ_FLUSH)
 #define REQ_IO_STAT             (1 << __REQ_IO_STAT)
 #define REQ_MIXED_MERGE         (1 << __REQ_MIXED_MERGE)