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authorNikita Danilov <nikita@clusterfs.com>2005-09-06 15:17:20 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-07 16:57:28 -0700
commit4b0dc07e66ade18e0209331afbd16b3de8384f5c (patch)
treef00b0b3e4649ffcbcf1ff26c08ee28371a857c89 /drivers/block/deadline-iosched.c
parentffdfc40976dda18d923cd001d44bf0ee55da1af4 (diff)
downloadlwn-4b0dc07e66ade18e0209331afbd16b3de8384f5c.tar.gz
lwn-4b0dc07e66ade18e0209331afbd16b3de8384f5c.zip
[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: Nikita Danilov <nikita@clusterfs.com> Cc: Jens Axboe <axboe@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/block/deadline-iosched.c')
-rw-r--r--drivers/block/deadline-iosched.c12
1 files changed, 2 insertions, 10 deletions
diff --git a/drivers/block/deadline-iosched.c b/drivers/block/deadline-iosched.c
index ff5201e02153..24594c57c323 100644
--- a/drivers/block/deadline-iosched.c
+++ b/drivers/block/deadline-iosched.c
@@ -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 @@ dispatch_writes:
dd->starved = 0;
data_dir = WRITE;
- other_dir = READ;
goto dispatch_find_request;
}