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Date: Fri, 24 Jul 2015 14:43:50 -0400
From: Tejun Heo <tj@...nel.org>
To: axboe@...nel.dk
Cc: vgoyal@...hat.com, linux-kernel@...r.kernel.org,
avanzini.arianna@...il.com, kernel-team@...com, hannes@...xchg.org,
lizefan@...wei.com, cgroups@...r.kernel.org,
Tejun Heo <tj@...nel.org>
Subject: [PATCH 06/10] blkcg: mark existing cftypes as legacy
blkcg is about to grow interface for the unified hierarchy. Add
legacy to existing cftypes.
* blkcg_policy->cftypes -> blkcg_policy->legacy_cftypes
* blk-cgroup.c:blkcg_files -> blkcg_legacy_files
* cfq-iosched.c:cfq_blkcg_files -> cfq_blkcg_legacy_files
* blk-throttle.c:throtl_files -> throtl_legacy_files
Pure renames. No functional change.
Signed-off-by: Tejun Heo <tj@...nel.org>
---
block/blk-cgroup.c | 12 ++++++------
block/blk-throttle.c | 4 ++--
block/cfq-iosched.c | 4 ++--
include/linux/blk-cgroup.h | 2 +-
4 files changed, 11 insertions(+), 11 deletions(-)
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index c2fb867..db7b3cc 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -847,7 +847,7 @@ void blkg_conf_finish(struct blkg_conf_ctx *ctx)
}
EXPORT_SYMBOL_GPL(blkg_conf_finish);
-struct cftype blkcg_files[] = {
+struct cftype blkcg_legacy_files[] = {
{
.name = "reset_stats",
.write_u64 = blkcg_reset_stats,
@@ -1093,7 +1093,7 @@ struct cgroup_subsys io_cgrp_subsys = {
.css_offline = blkcg_css_offline,
.css_free = blkcg_css_free,
.can_attach = blkcg_can_attach,
- .legacy_cftypes = blkcg_files,
+ .legacy_cftypes = blkcg_legacy_files,
.legacy_name = "blkio",
#ifdef CONFIG_MEMCG
/*
@@ -1264,9 +1264,9 @@ int blkcg_policy_register(struct blkcg_policy *pol)
mutex_unlock(&blkcg_pol_mutex);
/* everything is in place, add intf files for the new policy */
- if (pol->cftypes)
+ if (pol->legacy_cftypes)
WARN_ON(cgroup_add_legacy_cftypes(&io_cgrp_subsys,
- pol->cftypes));
+ pol->legacy_cftypes));
mutex_unlock(&blkcg_pol_register_mutex);
return 0;
@@ -1303,8 +1303,8 @@ void blkcg_policy_unregister(struct blkcg_policy *pol)
goto out_unlock;
/* kill the intf files first */
- if (pol->cftypes)
- cgroup_rm_cftypes(pol->cftypes);
+ if (pol->legacy_cftypes)
+ cgroup_rm_cftypes(pol->legacy_cftypes);
/* remove cpds and unregister */
mutex_lock(&blkcg_pol_mutex);
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index bd3e4b2..8b4f6b8 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -1217,7 +1217,7 @@ static ssize_t tg_set_conf_uint(struct kernfs_open_file *of,
return tg_set_conf(of, buf, nbytes, off, false);
}
-static struct cftype throtl_files[] = {
+static struct cftype throtl_legacy_files[] = {
{
.name = "throttle.read_bps_device",
.private = offsetof(struct throtl_grp, bps[READ]),
@@ -1263,7 +1263,7 @@ static void throtl_shutdown_wq(struct request_queue *q)
}
static struct blkcg_policy blkcg_policy_throtl = {
- .cftypes = throtl_files,
+ .legacy_cftypes = throtl_legacy_files,
.pd_alloc_fn = throtl_pd_alloc,
.pd_init_fn = throtl_pd_init,
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 38277e3..baa8459 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -1944,7 +1944,7 @@ static int cfqg_print_avg_queue_size(struct seq_file *sf, void *v)
}
#endif /* CONFIG_DEBUG_BLK_CGROUP */
-static struct cftype cfq_blkcg_files[] = {
+static struct cftype cfq_blkcg_legacy_files[] = {
/* on root, weight is mapped to leaf_weight */
{
.name = "weight_device",
@@ -4654,7 +4654,7 @@ static struct elevator_type iosched_cfq = {
#ifdef CONFIG_CFQ_GROUP_IOSCHED
static struct blkcg_policy blkcg_policy_cfq = {
- .cftypes = cfq_blkcg_files,
+ .legacy_cftypes = cfq_blkcg_legacy_files,
.cpd_alloc_fn = cfq_cpd_alloc,
.cpd_init_fn = cfq_cpd_init,
diff --git a/include/linux/blk-cgroup.h b/include/linux/blk-cgroup.h
index db89acd..6e016e6 100644
--- a/include/linux/blk-cgroup.h
+++ b/include/linux/blk-cgroup.h
@@ -148,7 +148,7 @@ typedef void (blkcg_pol_reset_pd_stats_fn)(struct blkg_policy_data *pd);
struct blkcg_policy {
int plid;
/* cgroup files for the policy */
- struct cftype *cftypes;
+ struct cftype *legacy_cftypes;
/* operations */
blkcg_pol_alloc_cpd_fn *cpd_alloc_fn;
--
2.4.3
--
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