block: Add flag for telling the IO schedulers NOT to anticipate more IO

[mirror_ubuntu-artful-kernel.git] / include / linux / blkdev.h

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 67dae3bd881c28c5aa0b2c9d427c0da834d494ad..e03660964e02002d1724a7fdaef14243407d620e 100644 (file)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -118,6 +118,7 @@ enum rq_flag_bits {
        __REQ_COPY_USER,        /* contains copies of user pages */
        __REQ_INTEGRITY,        /* integrity metadata has been remapped */
        __REQ_UNPLUG,           /* unplug queue on submission */
+       __REQ_NOIDLE,           /* Don't anticipate more IO after this one */
        __REQ_NR_BITS,          /* stops here */
 };
 
@@ -145,6 +146,7 @@ enum rq_flag_bits {
 #define REQ_COPY_USER  (1 << __REQ_COPY_USER)
 #define REQ_INTEGRITY  (1 << __REQ_INTEGRITY)
 #define REQ_UNPLUG     (1 << __REQ_UNPLUG)
+#define REQ_NOIDLE     (1 << __REQ_NOIDLE)
 
 #define BLK_MAX_CDB    16
 
@@ -633,6 +635,7 @@ static inline bool rq_is_sync(struct request *rq)
 }
 
 #define rq_is_meta(rq)         ((rq)->cmd_flags & REQ_RW_META)
+#define rq_noidle(rq)          ((rq)->cmd_flags & REQ_NOIDLE)
 
 static inline int blk_queue_full(struct request_queue *q, int sync)
 {