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mm: memcontrol: switch to the updated jump-label API

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According to <linux/jump_label.h> the direct use of struct static_key is
deprecated.  Update the socket and slab accounting code accordingly.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: David S. Miller <davem@davemloft.net>
Reported-by: Jason Baron <jbaron@akamai.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Johannes Weiner 2016-01-14 15:21:34 -08:00 committed by Linus Torvalds
parent 8e8ae64524
commit ef12947c9c
3 changed files with 12 additions and 12 deletions
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8
include/linux/memcontrol.h
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@ -704,8 +704,8 @@ void sock_release_memcg(struct sock *sk);
bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages);
void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages);
#if defined(CONFIG_MEMCG) && defined(CONFIG_INET)
extern struct static_key memcg_sockets_enabled_key;
#define mem_cgroup_sockets_enabled static_key_false(&memcg_sockets_enabled_key)
extern struct static_key_false memcg_sockets_enabled_key;
#define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key)
static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg)
{
#ifdef CONFIG_MEMCG_KMEM
@ -727,7 +727,7 @@ static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg)
#endif
#ifdef CONFIG_MEMCG_KMEM
extern struct static_key memcg_kmem_enabled_key;
extern struct static_key_false memcg_kmem_enabled_key;
extern int memcg_nr_cache_ids;
void memcg_get_cache_ids(void);
@ -743,7 +743,7 @@ void memcg_put_cache_ids(void);
static inline bool memcg_kmem_enabled(void)
{
return static_key_false(&memcg_kmem_enabled_key);
return static_branch_unlikely(&memcg_kmem_enabled_key);
}
static inline bool memcg_kmem_is_active(struct mem_cgroup *memcg)

12
mm/memcontrol.c
View File

@ -346,7 +346,7 @@ void memcg_put_cache_ids(void)
* conditional to this static branch, we'll have to allow modules that does
* kmem_cache_alloc and the such to see this symbol as well
*/
struct static_key memcg_kmem_enabled_key;
DEFINE_STATIC_KEY_FALSE(memcg_kmem_enabled_key);
EXPORT_SYMBOL(memcg_kmem_enabled_key);
#endif /* CONFIG_MEMCG_KMEM */
@ -2907,7 +2907,7 @@ static int memcg_activate_kmem(struct mem_cgroup *memcg,
err = page_counter_limit(&memcg->kmem, nr_pages);
VM_BUG_ON(err);
static_key_slow_inc(&memcg_kmem_enabled_key);
static_branch_inc(&memcg_kmem_enabled_key);
/*
* A memory cgroup is considered kmem-active as soon as it gets
* kmemcg_id. Setting the id after enabling static branching will
@ -3646,7 +3646,7 @@ static void memcg_destroy_kmem(struct mem_cgroup *memcg)
{
if (memcg->kmem_acct_activated) {
memcg_destroy_kmem_caches(memcg);
static_key_slow_dec(&memcg_kmem_enabled_key);
static_branch_dec(&memcg_kmem_enabled_key);
WARN_ON(page_counter_read(&memcg->kmem));
}
tcp_destroy_cgroup(memcg);
@ -4282,7 +4282,7 @@ mem_cgroup_css_online(struct cgroup_subsys_state *css)
#ifdef CONFIG_INET
if (cgroup_subsys_on_dfl(memory_cgrp_subsys) && !cgroup_memory_nosocket)
static_key_slow_inc(&memcg_sockets_enabled_key);
static_branch_inc(&memcg_sockets_enabled_key);
#endif
/*
@ -4333,7 +4333,7 @@ static void mem_cgroup_css_free(struct cgroup_subsys_state *css)
memcg_destroy_kmem(memcg);
#ifdef CONFIG_INET
if (cgroup_subsys_on_dfl(memory_cgrp_subsys) && !cgroup_memory_nosocket)
static_key_slow_dec(&memcg_sockets_enabled_key);
static_branch_dec(&memcg_sockets_enabled_key);
#endif
__mem_cgroup_free(memcg);
}
@ -5557,7 +5557,7 @@ void mem_cgroup_replace_page(struct page *oldpage, struct page *newpage)
#ifdef CONFIG_INET
struct static_key memcg_sockets_enabled_key;
DEFINE_STATIC_KEY_FALSE(memcg_sockets_enabled_key);
EXPORT_SYMBOL(memcg_sockets_enabled_key);
void sock_update_memcg(struct sock *sk)

4
net/ipv4/tcp_memcontrol.c
View File

@ -34,7 +34,7 @@ void tcp_destroy_cgroup(struct mem_cgroup *memcg)
return;
if (memcg->tcp_mem.active)
static_key_slow_dec(&memcg_sockets_enabled_key);
static_branch_dec(&memcg_sockets_enabled_key);
}
static int tcp_update_limit(struct mem_cgroup *memcg, unsigned long nr_pages)
@ -65,7 +65,7 @@ static int tcp_update_limit(struct mem_cgroup *memcg, unsigned long nr_pages)
* because when this value change, the code to process it is not
* patched in yet.
*/
static_key_slow_inc(&memcg_sockets_enabled_key);
static_branch_inc(&memcg_sockets_enabled_key);
memcg->tcp_mem.active = true;
}