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authorTejun Heo <tj@kernel.org>2012-04-01 14:38:43 -0700
committerTejun Heo <tj@kernel.org>2012-04-01 14:38:43 -0700
commit627f29f48158c3088cc55a25d8650cae455ff63b (patch)
treec8b2eb5250fbf15e5f932d15714b37f2ff6227a7 /block
parentd3d32e69fa368e131b25ee68806aa3fd3916cec1 (diff)
downloadlinux-627f29f48158c3088cc55a25d8650cae455ff63b.tar.gz
blkcg: drop blkiocg_file_write_u64()
blkiocg_file_write_u64() has single switch case. Drop blkiocg_file_write_u64(), rename blkio_weight_write() to blkcg_set_weight() and use it directly for .write_u64 callback. Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'block')
-rw-r--r--block/blk-cgroup.c35
1 files changed, 7 insertions, 28 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 951e7f3a8c8..13cae77e8bf 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -1207,8 +1207,9 @@ static int blkiocg_file_read(struct cgroup *cgrp, struct cftype *cft,
return 0;
}
-static int blkio_weight_write(struct blkio_cgroup *blkcg, int plid, u64 val)
+static int blkcg_set_weight(struct cgroup *cgrp, struct cftype *cft, u64 val)
{
+ struct blkio_cgroup *blkcg = cgroup_to_blkio_cgroup(cgrp);
struct blkio_group *blkg;
struct hlist_node *n;
@@ -1220,10 +1221,11 @@ static int blkio_weight_write(struct blkio_cgroup *blkcg, int plid, u64 val)
blkcg->weight = (unsigned int)val;
hlist_for_each_entry(blkg, n, &blkcg->blkg_list, blkcg_node) {
- struct blkg_policy_data *pd = blkg->pd[plid];
+ struct blkg_policy_data *pd = blkg->pd[BLKIO_POLICY_PROP];
- if (!pd->conf.weight)
- blkio_update_group_weight(blkg, plid, blkcg->weight);
+ if (pd && !pd->conf.weight)
+ blkio_update_group_weight(blkg, BLKIO_POLICY_PROP,
+ blkcg->weight);
}
spin_unlock_irq(&blkcg->lock);
@@ -1251,29 +1253,6 @@ static u64 blkiocg_file_read_u64 (struct cgroup *cgrp, struct cftype *cft) {
return 0;
}
-static int
-blkiocg_file_write_u64(struct cgroup *cgrp, struct cftype *cft, u64 val)
-{
- struct blkio_cgroup *blkcg;
- enum blkio_policy_id plid = BLKIOFILE_POLICY(cft->private);
- int name = BLKIOFILE_ATTR(cft->private);
-
- blkcg = cgroup_to_blkio_cgroup(cgrp);
-
- switch(plid) {
- case BLKIO_POLICY_PROP:
- switch(name) {
- case BLKIO_PROP_weight:
- return blkio_weight_write(blkcg, plid, val);
- }
- break;
- default:
- BUG();
- }
-
- return 0;
-}
-
struct cftype blkio_files[] = {
{
.name = "weight_device",
@@ -1288,7 +1267,7 @@ struct cftype blkio_files[] = {
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
BLKIO_PROP_weight),
.read_u64 = blkiocg_file_read_u64,
- .write_u64 = blkiocg_file_write_u64,
+ .write_u64 = blkcg_set_weight,
},
{
.name = "time",