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-rw-r--r--block/blk-ioc.c40
-rw-r--r--block/blk-throttle.c8
-rw-r--r--block/cfq-iosched.c15
-rw-r--r--block/deadline-iosched.c4
-rw-r--r--block/elevator.c7
-rw-r--r--block/genhd.c6
6 files changed, 35 insertions, 45 deletions
diff --git a/block/blk-ioc.c b/block/blk-ioc.c
index 342eae9b0d3..6f9bbd97865 100644
--- a/block/blk-ioc.c
+++ b/block/blk-ioc.c
@@ -82,26 +82,26 @@ void exit_io_context(struct task_struct *task)
struct io_context *alloc_io_context(gfp_t gfp_flags, int node)
{
- struct io_context *ret;
+ struct io_context *ioc;
- ret = kmem_cache_alloc_node(iocontext_cachep, gfp_flags, node);
- if (ret) {
- atomic_long_set(&ret->refcount, 1);
- atomic_set(&ret->nr_tasks, 1);
- spin_lock_init(&ret->lock);
- ret->ioprio_changed = 0;
- ret->ioprio = 0;
- ret->last_waited = 0; /* doesn't matter... */
- ret->nr_batch_requests = 0; /* because this is 0 */
- INIT_RADIX_TREE(&ret->radix_root, GFP_ATOMIC | __GFP_HIGH);
- INIT_HLIST_HEAD(&ret->cic_list);
- ret->ioc_data = NULL;
+ ioc = kmem_cache_alloc_node(iocontext_cachep, gfp_flags, node);
+ if (ioc) {
+ atomic_long_set(&ioc->refcount, 1);
+ atomic_set(&ioc->nr_tasks, 1);
+ spin_lock_init(&ioc->lock);
+ ioc->ioprio_changed = 0;
+ ioc->ioprio = 0;
+ ioc->last_waited = 0; /* doesn't matter... */
+ ioc->nr_batch_requests = 0; /* because this is 0 */
+ INIT_RADIX_TREE(&ioc->radix_root, GFP_ATOMIC | __GFP_HIGH);
+ INIT_HLIST_HEAD(&ioc->cic_list);
+ ioc->ioc_data = NULL;
#if defined(CONFIG_BLK_CGROUP) || defined(CONFIG_BLK_CGROUP_MODULE)
- ret->cgroup_changed = 0;
+ ioc->cgroup_changed = 0;
#endif
}
- return ret;
+ return ioc;
}
/*
@@ -139,19 +139,19 @@ struct io_context *current_io_context(gfp_t gfp_flags, int node)
*/
struct io_context *get_io_context(gfp_t gfp_flags, int node)
{
- struct io_context *ret = NULL;
+ struct io_context *ioc = NULL;
/*
* Check for unlikely race with exiting task. ioc ref count is
* zero when ioc is being detached.
*/
do {
- ret = current_io_context(gfp_flags, node);
- if (unlikely(!ret))
+ ioc = current_io_context(gfp_flags, node);
+ if (unlikely(!ioc))
break;
- } while (!atomic_long_inc_not_zero(&ret->refcount));
+ } while (!atomic_long_inc_not_zero(&ioc->refcount));
- return ret;
+ return ioc;
}
EXPORT_SYMBOL(get_io_context);
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 3689f833afd..f6a79412050 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -142,9 +142,9 @@ static inline struct throtl_grp *tg_of_blkg(struct blkio_group *blkg)
return NULL;
}
-static inline int total_nr_queued(struct throtl_data *td)
+static inline unsigned int total_nr_queued(struct throtl_data *td)
{
- return (td->nr_queued[0] + td->nr_queued[1]);
+ return td->nr_queued[0] + td->nr_queued[1];
}
static inline struct throtl_grp *throtl_ref_get_tg(struct throtl_grp *tg)
@@ -927,7 +927,7 @@ static int throtl_dispatch(struct request_queue *q)
bio_list_init(&bio_list_on_stack);
- throtl_log(td, "dispatch nr_queued=%d read=%u write=%u",
+ throtl_log(td, "dispatch nr_queued=%u read=%u write=%u",
total_nr_queued(td), td->nr_queued[READ],
td->nr_queued[WRITE]);
@@ -970,7 +970,7 @@ throtl_schedule_delayed_work(struct throtl_data *td, unsigned long delay)
struct delayed_work *dwork = &td->throtl_work;
/* schedule work if limits changed even if no bio is queued */
- if (total_nr_queued(td) > 0 || td->limits_changed) {
+ if (total_nr_queued(td) || td->limits_changed) {
/*
* We might have a work scheduled to be executed in future.
* Cancel that and schedule a new one.
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index ae21919f15e..b2e1c75e4fb 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -1005,8 +1005,8 @@ static inline struct cfq_group *cfqg_of_blkg(struct blkio_group *blkg)
return NULL;
}
-void cfq_update_blkio_group_weight(void *key, struct blkio_group *blkg,
- unsigned int weight)
+static void cfq_update_blkio_group_weight(void *key, struct blkio_group *blkg,
+ unsigned int weight)
{
struct cfq_group *cfqg = cfqg_of_blkg(blkg);
cfqg->new_weight = weight;
@@ -1235,7 +1235,7 @@ static void cfq_release_cfq_groups(struct cfq_data *cfqd)
* it should not be NULL as even if elevator was exiting, cgroup deltion
* path got to it first.
*/
-void cfq_unlink_blkio_group(void *key, struct blkio_group *blkg)
+static void cfq_unlink_blkio_group(void *key, struct blkio_group *blkg)
{
unsigned long flags;
struct cfq_data *cfqd = key;
@@ -1502,16 +1502,11 @@ static void cfq_add_rq_rb(struct request *rq)
{
struct cfq_queue *cfqq = RQ_CFQQ(rq);
struct cfq_data *cfqd = cfqq->cfqd;
- struct request *__alias, *prev;
+ struct request *prev;
cfqq->queued[rq_is_sync(rq)]++;
- /*
- * looks a little odd, but the first insert might return an alias.
- * if that happens, put the alias on the dispatch list
- */
- while ((__alias = elv_rb_add(&cfqq->sort_list, rq)) != NULL)
- cfq_dispatch_insert(cfqd->queue, __alias);
+ elv_rb_add(&cfqq->sort_list, rq);
if (!cfq_cfqq_on_rr(cfqq))
cfq_add_cfqq_rr(cfqd, cfqq);
diff --git a/block/deadline-iosched.c b/block/deadline-iosched.c
index 5139c0ea186..c644137d9cd 100644
--- a/block/deadline-iosched.c
+++ b/block/deadline-iosched.c
@@ -77,10 +77,8 @@ static void
deadline_add_rq_rb(struct deadline_data *dd, struct request *rq)
{
struct rb_root *root = deadline_rb_root(dd, rq);
- struct request *__alias;
- while (unlikely(__alias = elv_rb_add(root, rq)))
- deadline_move_request(dd, __alias);
+ elv_rb_add(root, rq);
}
static inline void
diff --git a/block/elevator.c b/block/elevator.c
index b0b38ce0dcb..a3b64bc71d8 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -353,7 +353,7 @@ static struct request *elv_rqhash_find(struct request_queue *q, sector_t offset)
* RB-tree support functions for inserting/lookup/removal of requests
* in a sorted RB tree.
*/
-struct request *elv_rb_add(struct rb_root *root, struct request *rq)
+void elv_rb_add(struct rb_root *root, struct request *rq)
{
struct rb_node **p = &root->rb_node;
struct rb_node *parent = NULL;
@@ -365,15 +365,12 @@ struct request *elv_rb_add(struct rb_root *root, struct request *rq)
if (blk_rq_pos(rq) < blk_rq_pos(__rq))
p = &(*p)->rb_left;
- else if (blk_rq_pos(rq) > blk_rq_pos(__rq))
+ else if (blk_rq_pos(rq) >= blk_rq_pos(__rq))
p = &(*p)->rb_right;
- else
- return __rq;
}
rb_link_node(&rq->rb_node, parent, p);
rb_insert_color(&rq->rb_node, root);
- return NULL;
}
EXPORT_SYMBOL(elv_rb_add);
diff --git a/block/genhd.c b/block/genhd.c
index 3608289c8ec..82d97c3594a 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -602,7 +602,7 @@ void add_disk(struct gendisk *disk)
disk->major = MAJOR(devt);
disk->first_minor = MINOR(devt);
- /* Register BDI before referencing it from bdev */
+ /* Register BDI before referencing it from bdev */
bdi = &disk->queue->backing_dev_info;
bdi_register_dev(bdi, disk_devt(disk));
@@ -1148,7 +1148,7 @@ static int diskstats_show(struct seq_file *seqf, void *v)
"wsect wuse running use aveq"
"\n\n");
*/
-
+
disk_part_iter_init(&piter, gp, DISK_PITER_INCL_EMPTY_PART0);
while ((hd = disk_part_iter_next(&piter))) {
cpu = part_stat_lock();
@@ -1172,7 +1172,7 @@ static int diskstats_show(struct seq_file *seqf, void *v)
);
}
disk_part_iter_exit(&piter);
-
+
return 0;
}