Merge branch 'master' of /home/trondmy/kernel/linux-2.6/

[linux-2.6-omap-h63xx.git] / block / cfq-iosched.c

diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 8e9d84825e1c519500288da6602b208fcec33995..6200d9b9af28efbbd5aaac5373995ca8334dbaaf 100644 (file)
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -60,14 +60,9 @@ static DEFINE_SPINLOCK(cfq_exit_lock);
 /*
  * rb-tree defines
  */
-#define RB_NONE                        (2)
 #define RB_EMPTY(node)         ((node)->rb_node == NULL)
-#define RB_CLEAR_COLOR(node)   (node)->rb_color = RB_NONE
 #define RB_CLEAR(node)         do {    \
-       (node)->rb_parent = NULL;       \
-       RB_CLEAR_COLOR((node));         \
-       (node)->rb_right = NULL;        \
-       (node)->rb_left = NULL;         \
+               memset(node, 0, sizeof(*node)); \
 } while (0)
 #define RB_CLEAR_ROOT(root)    ((root)->rb_node = NULL)
 #define rb_entry_crq(node)     rb_entry((node), struct cfq_rq, rb_node)
@@ -567,7 +562,6 @@ static inline void cfq_del_crq_rb(struct cfq_rq *crq)
        cfq_update_next_crq(crq);
 
        rb_erase(&crq->rb_node, &cfqq->sort_list);
-       RB_CLEAR_COLOR(&crq->rb_node);
 
        if (cfq_cfqq_on_rr(cfqq) && RB_EMPTY(&cfqq->sort_list))
                cfq_del_cfqq_rr(cfqd, cfqq);
@@ -1323,17 +1317,12 @@ cfq_alloc_io_context(struct cfq_data *cfqd, gfp_t gfp_mask)
        struct cfq_io_context *cic = kmem_cache_alloc(cfq_ioc_pool, gfp_mask);
 
        if (cic) {
-               RB_CLEAR(&cic->rb_node);
-               cic->key = NULL;
-               cic->cfqq[ASYNC] = NULL;
-               cic->cfqq[SYNC] = NULL;
+               memset(cic, 0, sizeof(*cic));
+               RB_CLEAR_COLOR(&cic->rb_node);
                cic->last_end_request = jiffies;
-               cic->ttime_total = 0;
-               cic->ttime_samples = 0;
-               cic->ttime_mean = 0;
+               INIT_LIST_HEAD(&cic->queue_list);
                cic->dtor = cfq_free_io_context;
                cic->exit = cfq_exit_io_context;
-               INIT_LIST_HEAD(&cic->queue_list);
                atomic_inc(&ioc_count);
        }
 
@@ -2251,14 +2240,14 @@ static void cfq_exit_queue(elevator_t *e)
        kfree(cfqd);
 }
 
-static int cfq_init_queue(request_queue_t *q, elevator_t *e)
+static void *cfq_init_queue(request_queue_t *q, elevator_t *e)
 {
        struct cfq_data *cfqd;
        int i;
 
        cfqd = kmalloc(sizeof(*cfqd), GFP_KERNEL);
        if (!cfqd)
-               return -ENOMEM;
+               return NULL;
 
        memset(cfqd, 0, sizeof(*cfqd));
 
@@ -2288,8 +2277,6 @@ static int cfq_init_queue(request_queue_t *q, elevator_t *e)
        for (i = 0; i < CFQ_QHASH_ENTRIES; i++)
                INIT_HLIST_HEAD(&cfqd->cfq_hash[i]);
 
-       e->elevator_data = cfqd;
-
        cfqd->queue = q;
 
        cfqd->max_queued = q->nr_requests / 4;
@@ -2316,14 +2303,14 @@ static int cfq_init_queue(request_queue_t *q, elevator_t *e)
        cfqd->cfq_slice_async_rq = cfq_slice_async_rq;
        cfqd->cfq_slice_idle = cfq_slice_idle;
 
-       return 0;
+       return cfqd;
 out_crqpool:
        kfree(cfqd->cfq_hash);
 out_cfqhash:
        kfree(cfqd->crq_hash);
 out_crqhash:
        kfree(cfqd);
-       return -ENOMEM;
+       return NULL;
 }
 
 static void cfq_slab_kill(void)