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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>
This commit is contained in:
Tejun Heo 2012-04-01 14:38:43 -07:00
parent d3d32e69fa
commit 627f29f481
1 changed files with 7 additions and 28 deletions
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35
block/blk-cgroup.c
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@ -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",