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| author | Jens Axboe <axboe@suse.de> | 2006-06-21 09:36:18 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@nelson.home.kernel.dk> | 2006-06-23 17:10:39 +0200 |
| commit | dd67d051529387f6e44d22d1d5540ef281965fdd (patch) | |
| tree | 80457f9a2ad3e562b179e40f5c8d51b4f24d6d9e /block/deadline-iosched.c | |
| parent | 9e94cd4fd1812bab45237f998b3c6fa1b24023fd (diff) | |
| download | lwn-dd67d051529387f6e44d22d1d5540ef281965fdd.tar.gz lwn-dd67d051529387f6e44d22d1d5540ef281965fdd.zip | |
[PATCH] rbtree: support functions used by the io schedulers
They all duplicate macros to check for empty root and/or node, and
clearing a node. So put those in rbtree.h.
Signed-off-by: Jens Axboe <axboe@suse.de>
Diffstat (limited to 'block/deadline-iosched.c')
| -rw-r--r-- | block/deadline-iosched.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/block/deadline-iosched.c b/block/deadline-iosched.c index e5bccaaed563..4469dd84623c 100644 --- a/block/deadline-iosched.c +++ b/block/deadline-iosched.c @@ -159,9 +159,6 @@ deadline_find_drq_hash(struct deadline_data *dd, sector_t offset) /* * rb tree support functions */ -#define RB_EMPTY(root) ((root)->rb_node == NULL) -#define ON_RB(node) (rb_parent(node) != node) -#define RB_CLEAR(node) (rb_set_parent(node, node)) #define rb_entry_drq(node) rb_entry((node), struct deadline_rq, rb_node) #define DRQ_RB_ROOT(dd, drq) (&(dd)->sort_list[rq_data_dir((drq)->request)]) #define rq_rb_key(rq) (rq)->sector @@ -220,9 +217,9 @@ deadline_del_drq_rb(struct deadline_data *dd, struct deadline_rq *drq) dd->next_drq[data_dir] = rb_entry_drq(rbnext); } - BUG_ON(!ON_RB(&drq->rb_node)); + BUG_ON(!RB_EMPTY_NODE(&drq->rb_node)); rb_erase(&drq->rb_node, DRQ_RB_ROOT(dd, drq)); - RB_CLEAR(&drq->rb_node); + RB_CLEAR_NODE(&drq->rb_node); } static struct request * @@ -496,7 +493,7 @@ static int deadline_dispatch_requests(request_queue_t *q, int force) */ if (reads) { - BUG_ON(RB_EMPTY(&dd->sort_list[READ])); + BUG_ON(RB_EMPTY_ROOT(&dd->sort_list[READ])); if (writes && (dd->starved++ >= dd->writes_starved)) goto dispatch_writes; @@ -512,7 +509,7 @@ static int deadline_dispatch_requests(request_queue_t *q, int force) if (writes) { dispatch_writes: - BUG_ON(RB_EMPTY(&dd->sort_list[WRITE])); + BUG_ON(RB_EMPTY_ROOT(&dd->sort_list[WRITE])); dd->starved = 0; @@ -668,7 +665,7 @@ deadline_set_request(request_queue_t *q, struct request *rq, struct bio *bio, drq = mempool_alloc(dd->drq_pool, gfp_mask); if (drq) { memset(drq, 0, sizeof(*drq)); - RB_CLEAR(&drq->rb_node); + RB_CLEAR_NODE(&drq->rb_node); drq->request = rq; INIT_HLIST_NODE(&drq->hash); |