Commit 4b0dc07e authored by Nikita Danilov's avatar Nikita Danilov Committed by Linus Torvalds

[PATCH] cleanup of deadline_dispatch_requests()

cleanup of deadline_dispatch_requests():

- replace drq selection with hopefully clearer while semantically the
  same construct: take write request, if there is any, otherwise take read
  one, or NULL if none exist.

- kill unused other_dir.
Signed-off-by: default avatarNikita Danilov <nikita@clusterfs.com>
Cc: Jens Axboe <axboe@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent ffdfc409
......@@ -507,18 +507,12 @@ static int deadline_dispatch_requests(struct deadline_data *dd)
const int reads = !list_empty(&dd->fifo_list[READ]);
const int writes = !list_empty(&dd->fifo_list[WRITE]);
struct deadline_rq *drq;
int data_dir, other_dir;
int data_dir;
/*
* batches are currently reads XOR writes
*/
drq = NULL;
if (dd->next_drq[READ])
drq = dd->next_drq[READ];
if (dd->next_drq[WRITE])
drq = dd->next_drq[WRITE];
drq = dd->next_drq[WRITE] ? : dd->next_drq[READ];
if (drq) {
/* we have a "next request" */
......@@ -544,7 +538,6 @@ static int deadline_dispatch_requests(struct deadline_data *dd)
goto dispatch_writes;
data_dir = READ;
other_dir = WRITE;
goto dispatch_find_request;
}
......@@ -560,7 +553,6 @@ static int deadline_dispatch_requests(struct deadline_data *dd)
dd->starved = 0;
data_dir = WRITE;
other_dir = READ;
goto dispatch_find_request;
}
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment