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-rw-r--r--block/blk-throttle.c37
1 files changed, 25 insertions, 12 deletions
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 00c7eff66ecf..6a0a17a83862 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -49,6 +49,9 @@ struct tg_stats_cpu {
};
struct throtl_grp {
+ /* must be the first member */
+ struct blkg_policy_data pd;
+
/* active throtl group service_tree member */
struct rb_node rb_node;
@@ -120,14 +123,19 @@ static LIST_HEAD(tg_stats_alloc_list);
static void tg_stats_alloc_fn(struct work_struct *);
static DECLARE_DELAYED_WORK(tg_stats_alloc_work, tg_stats_alloc_fn);
+static inline struct throtl_grp *pd_to_tg(struct blkg_policy_data *pd)
+{
+ return pd ? container_of(pd, struct throtl_grp, pd) : NULL;
+}
+
static inline struct throtl_grp *blkg_to_tg(struct blkcg_gq *blkg)
{
- return blkg_to_pdata(blkg, &blkcg_policy_throtl);
+ return pd_to_tg(blkg_to_pd(blkg, &blkcg_policy_throtl));
}
static inline struct blkcg_gq *tg_to_blkg(struct throtl_grp *tg)
{
- return pdata_to_blkg(tg);
+ return pd_to_blkg(&tg->pd);
}
static inline struct throtl_grp *td_root_tg(struct throtl_data *td)
@@ -931,9 +939,10 @@ throtl_schedule_delayed_work(struct throtl_data *td, unsigned long delay)
}
}
-static u64 tg_prfill_cpu_rwstat(struct seq_file *sf, void *pdata, int off)
+static u64 tg_prfill_cpu_rwstat(struct seq_file *sf,
+ struct blkg_policy_data *pd, int off)
{
- struct throtl_grp *tg = pdata;
+ struct throtl_grp *tg = pd_to_tg(pd);
struct blkg_rwstat rwstat = { }, tmp;
int i, cpu;
@@ -945,7 +954,7 @@ static u64 tg_prfill_cpu_rwstat(struct seq_file *sf, void *pdata, int off)
rwstat.cnt[i] += tmp.cnt[i];
}
- return __blkg_prfill_rwstat(sf, pdata, &rwstat);
+ return __blkg_prfill_rwstat(sf, pd, &rwstat);
}
static int tg_print_cpu_rwstat(struct cgroup *cgrp, struct cftype *cft,
@@ -958,22 +967,26 @@ static int tg_print_cpu_rwstat(struct cgroup *cgrp, struct cftype *cft,
return 0;
}
-static u64 tg_prfill_conf_u64(struct seq_file *sf, void *pdata, int off)
+static u64 tg_prfill_conf_u64(struct seq_file *sf, struct blkg_policy_data *pd,
+ int off)
{
- u64 v = *(u64 *)(pdata + off);
+ struct throtl_grp *tg = pd_to_tg(pd);
+ u64 v = *(u64 *)((void *)tg + off);
if (v == -1)
return 0;
- return __blkg_prfill_u64(sf, pdata, v);
+ return __blkg_prfill_u64(sf, pd, v);
}
-static u64 tg_prfill_conf_uint(struct seq_file *sf, void *pdata, int off)
+static u64 tg_prfill_conf_uint(struct seq_file *sf, struct blkg_policy_data *pd,
+ int off)
{
- unsigned int v = *(unsigned int *)(pdata + off);
+ struct throtl_grp *tg = pd_to_tg(pd);
+ unsigned int v = *(unsigned int *)((void *)tg + off);
if (v == -1)
return 0;
- return __blkg_prfill_u64(sf, pdata, v);
+ return __blkg_prfill_u64(sf, pd, v);
}
static int tg_print_conf_u64(struct cgroup *cgrp, struct cftype *cft,
@@ -1092,7 +1105,7 @@ static struct blkcg_policy blkcg_policy_throtl = {
.pd_exit_fn = throtl_pd_exit,
.pd_reset_stats_fn = throtl_pd_reset_stats,
},
- .pdata_size = sizeof(struct throtl_grp),
+ .pd_size = sizeof(struct throtl_grp),
.cftypes = throtl_files,
};