summaryrefslogtreecommitdiff
path: root/block/blk-cgroup.c
diff options
context:
space:
mode:
authorTejun Heo <tj@kernel.org>2012-04-14 00:11:27 +0400
committerJens Axboe <axboe@kernel.dk>2012-04-20 12:06:06 +0400
commitec399347d39fb2337ebace928cf4a2855bd0ec37 (patch)
treed95efeb004e8da914f7d3c726cd059b422443694 /block/blk-cgroup.c
parentbc0d6501a844392ab6ad419d7ca5af4693b6afac (diff)
downloadlinux-ec399347d39fb2337ebace928cf4a2855bd0ec37.tar.xz
blkcg: use @pol instead of @plid in update_root_blkg_pd() and blkcg_print_blkgs()
The two functions were taking "enum blkio_policy_id plid". Make them take "const struct blkio_policy_type *pol" instead. This is to prepare for per-queue policy activation and doesn't cause any functional difference. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-cgroup.c')
-rw-r--r--block/blk-cgroup.c21
1 files changed, 11 insertions, 10 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index af665fe7f4f2..b1231524a097 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -226,17 +226,17 @@ static void blkg_destroy(struct blkio_group *blkg)
* aren't shot down. This broken and racy implementation is temporary.
* Eventually, blkg shoot down will be replaced by proper in-place update.
*/
-void update_root_blkg_pd(struct request_queue *q, enum blkio_policy_id plid)
+void update_root_blkg_pd(struct request_queue *q,
+ const struct blkio_policy_type *pol)
{
- struct blkio_policy_type *pol = blkio_policy[plid];
struct blkio_group *blkg = blkg_lookup(&blkio_root_cgroup, q);
struct blkg_policy_data *pd;
if (!blkg)
return;
- kfree(blkg->pd[plid]);
- blkg->pd[plid] = NULL;
+ kfree(blkg->pd[pol->plid]);
+ blkg->pd[pol->plid] = NULL;
if (!pol)
return;
@@ -244,7 +244,7 @@ void update_root_blkg_pd(struct request_queue *q, enum blkio_policy_id plid)
pd = kzalloc(sizeof(*pd) + pol->pdata_size, GFP_KERNEL);
WARN_ON_ONCE(!pd);
- blkg->pd[plid] = pd;
+ blkg->pd[pol->plid] = pd;
pd->blkg = blkg;
pol->ops.blkio_init_group_fn(blkg);
}
@@ -360,7 +360,8 @@ static const char *blkg_dev_name(struct blkio_group *blkg)
*/
void blkcg_print_blkgs(struct seq_file *sf, struct blkio_cgroup *blkcg,
u64 (*prfill)(struct seq_file *, void *, int),
- int pol, int data, bool show_total)
+ const struct blkio_policy_type *pol, int data,
+ bool show_total)
{
struct blkio_group *blkg;
struct hlist_node *n;
@@ -368,8 +369,8 @@ void blkcg_print_blkgs(struct seq_file *sf, struct blkio_cgroup *blkcg,
spin_lock_irq(&blkcg->lock);
hlist_for_each_entry(blkg, n, &blkcg->blkg_list, blkcg_node)
- if (blkg->pd[pol])
- total += prfill(sf, blkg->pd[pol]->pdata, data);
+ if (blkg->pd[pol->plid])
+ total += prfill(sf, blkg->pd[pol->plid]->pdata, data);
spin_unlock_irq(&blkcg->lock);
if (show_total)
@@ -739,7 +740,7 @@ void blkio_policy_register(struct blkio_policy_type *blkiop)
BUG_ON(blkio_policy[blkiop->plid]);
blkio_policy[blkiop->plid] = blkiop;
list_for_each_entry(q, &all_q_list, all_q_node)
- update_root_blkg_pd(q, blkiop->plid);
+ update_root_blkg_pd(q, blkiop);
blkcg_bypass_end();
@@ -765,7 +766,7 @@ void blkio_policy_unregister(struct blkio_policy_type *blkiop)
blkio_policy[blkiop->plid] = NULL;
list_for_each_entry(q, &all_q_list, all_q_node)
- update_root_blkg_pd(q, blkiop->plid);
+ update_root_blkg_pd(q, blkiop);
blkcg_bypass_end();
mutex_unlock(&blkcg_pol_mutex);