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[PATCH] don't bother with refcounting for cfq_data 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2006-03-18 12:05:37 -05:00
parent 483f4afc42
commit a90d742e4c
1 changed files with 7 additions and 21 deletions
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28
block/cfq-iosched.c
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@ -114,7 +114,6 @@ static struct completion *ioc_gone;
* Per block device queue structure
*/
struct cfq_data {
atomic_t ref;
request_queue_t *queue;
/*
@ -295,7 +294,6 @@ CFQ_CRQ_FNS(is_sync);
static struct cfq_queue *cfq_find_cfq_hash(struct cfq_data *, unsigned int, unsigned short);
static void cfq_dispatch_insert(request_queue_t *, struct cfq_rq *);
static void cfq_put_cfqd(struct cfq_data *cfqd);
static struct cfq_queue *cfq_get_queue(struct cfq_data *cfqd, unsigned int key, struct task_struct *tsk, gfp_t gfp_mask);
#define process_sync(tsk) ((tsk)->flags & PF_SYNCWRITE)
@ -1168,8 +1166,6 @@ static void cfq_put_queue(struct cfq_queue *cfqq)
if (unlikely(cfqd->active_queue == cfqq))
__cfq_slice_expired(cfqd, cfqq, 0);
cfq_put_cfqd(cfqq->cfqd);
/*
* it's on the empty list and still hashed
*/
@ -1442,7 +1438,6 @@ retry:
hlist_add_head(&cfqq->cfq_hash, &cfqd->cfq_hash[hashval]);
atomic_set(&cfqq->ref, 0);
cfqq->cfqd = cfqd;
atomic_inc(&cfqd->ref);
cfqq->service_last = 0;
/*
* set ->slice_left to allow preemption for a new process
@ -2144,19 +2139,6 @@ static void cfq_shutdown_timer_wq(struct cfq_data *cfqd)
blk_sync_queue(cfqd->queue);
}
static void cfq_put_cfqd(struct cfq_data *cfqd)
{
if (!atomic_dec_and_test(&cfqd->ref))
return;
cfq_shutdown_timer_wq(cfqd);
mempool_destroy(cfqd->crq_pool);
kfree(cfqd->crq_hash);
kfree(cfqd->cfq_hash);
kfree(cfqd);
}
static void cfq_exit_queue(elevator_t *e)
{
struct cfq_data *cfqd = e->elevator_data;
@ -2184,7 +2166,13 @@ static void cfq_exit_queue(elevator_t *e)
}
spin_unlock_irq(q->queue_lock);
write_unlock(&cfq_exit_lock);
cfq_put_cfqd(cfqd);
cfq_shutdown_timer_wq(cfqd);
mempool_destroy(cfqd->crq_pool);
kfree(cfqd->crq_hash);
kfree(cfqd->cfq_hash);
kfree(cfqd);
}
static int cfq_init_queue(request_queue_t *q, elevator_t *e)
@ -2241,8 +2229,6 @@ static int cfq_init_queue(request_queue_t *q, elevator_t *e)
INIT_WORK(&cfqd->unplug_work, cfq_kick_queue, q);
atomic_set(&cfqd->ref, 1);
cfqd->cfq_queued = cfq_queued;
cfqd->cfq_quantum = cfq_quantum;
cfqd->cfq_fifo_expire[0] = cfq_fifo_expire[0];