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-rw-r--r--include/linux/blkdev.h18
-rw-r--r--include/linux/elevator.h1
2 files changed, 13 insertions, 6 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 36ab42c9bb99..6d7e9afd08c3 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -99,13 +99,18 @@ struct request {
/*
* The rb_node is only used inside the io scheduler, requests
* are pruned when moved to the dispatch queue. So let the
- * completion_data share space with the rb_node.
+ * flush fields share space with the rb_node.
*/
union {
struct rb_node rb_node; /* sort/lookup */
- void *completion_data;
+ struct {
+ unsigned int seq;
+ struct list_head list;
+ } flush;
};
+ void *completion_data;
+
/*
* Three pointers are available for the IO schedulers, if they need
* more they have to dynamically allocate it.
@@ -362,11 +367,12 @@ struct request_queue
* for flush operations
*/
unsigned int flush_flags;
- unsigned int flush_seq;
- int flush_err;
+ unsigned int flush_pending_idx:1;
+ unsigned int flush_running_idx:1;
+ unsigned long flush_pending_since;
+ struct list_head flush_queue[2];
+ struct list_head flush_data_in_flight;
struct request flush_rq;
- struct request *orig_flush_rq;
- struct list_head pending_flushes;
struct mutex sysfs_lock;
diff --git a/include/linux/elevator.h b/include/linux/elevator.h
index 4fd978e7eb83..86120c916fcc 100644
--- a/include/linux/elevator.h
+++ b/include/linux/elevator.h
@@ -167,6 +167,7 @@ extern struct request *elv_rb_find(struct rb_root *, sector_t);
#define ELEVATOR_INSERT_BACK 2
#define ELEVATOR_INSERT_SORT 3
#define ELEVATOR_INSERT_REQUEUE 4
+#define ELEVATOR_INSERT_FLUSH 5
/*
* return values from elevator_may_queue_fn