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Diffstat (limited to 'mm/memcontrol.c')
-rw-r--r--mm/memcontrol.c53
1 files changed, 22 insertions, 31 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 3c93dcfd26da..42f2843af1a7 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -233,9 +233,9 @@ struct mem_cgroup_eventfd_list {
*/
struct cgroup_event {
/*
- * css which the event belongs to.
+ * memcg which the event belongs to.
*/
- struct cgroup_subsys_state *css;
+ struct mem_cgroup *memcg;
/*
* eventfd to signal userspace about the event.
*/
@@ -249,14 +249,14 @@ struct cgroup_event {
* waiter for changes related to this event. Use eventfd_signal()
* on eventfd to send notification to userspace.
*/
- int (*register_event)(struct cgroup_subsys_state *css,
+ int (*register_event)(struct mem_cgroup *memcg,
struct eventfd_ctx *eventfd, const char *args);
/*
* unregister_event() callback will be called when userspace closes
* the eventfd or on cgroup removing. This callback must be set,
* if you want provide notification functionality.
*/
- void (*unregister_event)(struct cgroup_subsys_state *css,
+ void (*unregister_event)(struct mem_cgroup *memcg,
struct eventfd_ctx *eventfd);
/*
* All fields below needed to unregister event when
@@ -535,11 +535,6 @@ struct cgroup_subsys_state *vmpressure_to_css(struct vmpressure *vmpr)
return &container_of(vmpr, struct mem_cgroup, vmpressure)->css;
}
-struct vmpressure *css_to_vmpressure(struct cgroup_subsys_state *css)
-{
- return &mem_cgroup_from_css(css)->vmpressure;
-}
-
static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg)
{
return (memcg == root_mem_cgroup);
@@ -5682,10 +5677,9 @@ static void mem_cgroup_oom_notify(struct mem_cgroup *memcg)
mem_cgroup_oom_notify_cb(iter);
}
-static int __mem_cgroup_usage_register_event(struct cgroup_subsys_state *css,
+static int __mem_cgroup_usage_register_event(struct mem_cgroup *memcg,
struct eventfd_ctx *eventfd, const char *args, enum res_type type)
{
- struct mem_cgroup *memcg = mem_cgroup_from_css(css);
struct mem_cgroup_thresholds *thresholds;
struct mem_cgroup_threshold_ary *new;
u64 threshold, usage;
@@ -5764,22 +5758,21 @@ unlock:
return ret;
}
-static int mem_cgroup_usage_register_event(struct cgroup_subsys_state *css,
+static int mem_cgroup_usage_register_event(struct mem_cgroup *memcg,
struct eventfd_ctx *eventfd, const char *args)
{
- return __mem_cgroup_usage_register_event(css, eventfd, args, _MEM);
+ return __mem_cgroup_usage_register_event(memcg, eventfd, args, _MEM);
}
-static int memsw_cgroup_usage_register_event(struct cgroup_subsys_state *css,
+static int memsw_cgroup_usage_register_event(struct mem_cgroup *memcg,
struct eventfd_ctx *eventfd, const char *args)
{
- return __mem_cgroup_usage_register_event(css, eventfd, args, _MEMSWAP);
+ return __mem_cgroup_usage_register_event(memcg, eventfd, args, _MEMSWAP);
}
-static void __mem_cgroup_usage_unregister_event(struct cgroup_subsys_state *css,
+static void __mem_cgroup_usage_unregister_event(struct mem_cgroup *memcg,
struct eventfd_ctx *eventfd, enum res_type type)
{
- struct mem_cgroup *memcg = mem_cgroup_from_css(css);
struct mem_cgroup_thresholds *thresholds;
struct mem_cgroup_threshold_ary *new;
u64 usage;
@@ -5854,22 +5847,21 @@ unlock:
mutex_unlock(&memcg->thresholds_lock);
}
-static void mem_cgroup_usage_unregister_event(struct cgroup_subsys_state *css,
+static void mem_cgroup_usage_unregister_event(struct mem_cgroup *memcg,
struct eventfd_ctx *eventfd)
{
- return __mem_cgroup_usage_unregister_event(css, eventfd, _MEM);
+ return __mem_cgroup_usage_unregister_event(memcg, eventfd, _MEM);
}
-static void memsw_cgroup_usage_unregister_event(struct cgroup_subsys_state *css,
+static void memsw_cgroup_usage_unregister_event(struct mem_cgroup *memcg,
struct eventfd_ctx *eventfd)
{
- return __mem_cgroup_usage_unregister_event(css, eventfd, _MEMSWAP);
+ return __mem_cgroup_usage_unregister_event(memcg, eventfd, _MEMSWAP);
}
-static int mem_cgroup_oom_register_event(struct cgroup_subsys_state *css,
+static int mem_cgroup_oom_register_event(struct mem_cgroup *memcg,
struct eventfd_ctx *eventfd, const char *args)
{
- struct mem_cgroup *memcg = mem_cgroup_from_css(css);
struct mem_cgroup_eventfd_list *event;
event = kmalloc(sizeof(*event), GFP_KERNEL);
@@ -5889,10 +5881,9 @@ static int mem_cgroup_oom_register_event(struct cgroup_subsys_state *css,
return 0;
}
-static void mem_cgroup_oom_unregister_event(struct cgroup_subsys_state *css,
+static void mem_cgroup_oom_unregister_event(struct mem_cgroup *memcg,
struct eventfd_ctx *eventfd)
{
- struct mem_cgroup *memcg = mem_cgroup_from_css(css);
struct mem_cgroup_eventfd_list *ev, *tmp;
spin_lock(&memcg_oom_lock);
@@ -6019,18 +6010,18 @@ static void cgroup_event_remove(struct work_struct *work)
{
struct cgroup_event *event = container_of(work, struct cgroup_event,
remove);
- struct cgroup_subsys_state *css = event->css;
+ struct mem_cgroup *memcg = event->memcg;
remove_wait_queue(event->wqh, &event->wait);
- event->unregister_event(css, event->eventfd);
+ event->unregister_event(memcg, event->eventfd);
/* Notify userspace the event is going away. */
eventfd_signal(event->eventfd, 1);
eventfd_ctx_put(event->eventfd);
kfree(event);
- css_put(css);
+ css_put(&memcg->css);
}
/*
@@ -6043,7 +6034,7 @@ static int cgroup_event_wake(wait_queue_t *wait, unsigned mode,
{
struct cgroup_event *event = container_of(wait,
struct cgroup_event, wait);
- struct mem_cgroup *memcg = mem_cgroup_from_css(event->css);
+ struct mem_cgroup *memcg = event->memcg;
unsigned long flags = (unsigned long)key;
if (flags & POLLHUP) {
@@ -6114,7 +6105,7 @@ static int cgroup_write_event_control(struct cgroup_subsys_state *css,
if (!event)
return -ENOMEM;
- event->css = css;
+ event->memcg = memcg;
INIT_LIST_HEAD(&event->list);
init_poll_funcptr(&event->pt, cgroup_event_ptable_queue_proc);
init_waitqueue_func_entry(&event->wait, cgroup_event_wake);
@@ -6186,7 +6177,7 @@ static int cgroup_write_event_control(struct cgroup_subsys_state *css,
if (ret)
goto out_put_cfile;
- ret = event->register_event(css, event->eventfd, buffer);
+ ret = event->register_event(memcg, event->eventfd, buffer);
if (ret)
goto out_put_css;