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-rw-r--r--include/linux/blkdev.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index a905c4934a55..55ef6efe3eb5 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -531,6 +531,11 @@ enum {
#define rq_data_dir(rq) ((rq)->cmd_flags & 1)
+/*
+ * We regard a request as sync, if it's a READ or a SYNC write.
+ */
+#define rq_is_sync(rq) (rq_data_dir((rq)) == READ || (rq)->cmd_flags & REQ_RW_SYNC)
+
static inline int blk_queue_full(struct request_queue *q, int rw)
{
if (rw == READ)