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authorThomas Gleixner <tglx@linutronix.de>2016-09-26 15:47:03 -0400
committerThomas Gleixner <tglx@linutronix.de>2016-09-26 15:47:03 -0400
commit1e1b37273cf719545da50b76f214f983a710aaf4 (patch)
tree033f6062325ef7aaeefe8559bb409ab7d2be3c76 /mm/memcontrol.c
parentc183a603e8d8a5a189729b77d0c623a3d5950e5f (diff)
parentc291b015158577be533dd5a959dfc09bab119eed (diff)
Merge branch 'x86/urgent' into x86/apic
Bring in the upstream modifications so we can fixup the silent merge conflict which is introduced by this merge. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'mm/memcontrol.c')
-rw-r--r--mm/memcontrol.c36
1 files changed, 18 insertions, 18 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 2ff0289ad061..9a6a51a7c416 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4082,24 +4082,6 @@ static void mem_cgroup_id_get_many(struct mem_cgroup *memcg, unsigned int n)
4082 atomic_add(n, &memcg->id.ref); 4082 atomic_add(n, &memcg->id.ref);
4083} 4083}
4084 4084
4085static struct mem_cgroup *mem_cgroup_id_get_online(struct mem_cgroup *memcg)
4086{
4087 while (!atomic_inc_not_zero(&memcg->id.ref)) {
4088 /*
4089 * The root cgroup cannot be destroyed, so it's refcount must
4090 * always be >= 1.
4091 */
4092 if (WARN_ON_ONCE(memcg == root_mem_cgroup)) {
4093 VM_BUG_ON(1);
4094 break;
4095 }
4096 memcg = parent_mem_cgroup(memcg);
4097 if (!memcg)
4098 memcg = root_mem_cgroup;
4099 }
4100 return memcg;
4101}
4102
4103static void mem_cgroup_id_put_many(struct mem_cgroup *memcg, unsigned int n) 4085static void mem_cgroup_id_put_many(struct mem_cgroup *memcg, unsigned int n)
4104{ 4086{
4105 if (atomic_sub_and_test(n, &memcg->id.ref)) { 4087 if (atomic_sub_and_test(n, &memcg->id.ref)) {
@@ -5821,6 +5803,24 @@ static int __init mem_cgroup_init(void)
5821subsys_initcall(mem_cgroup_init); 5803subsys_initcall(mem_cgroup_init);
5822 5804
5823#ifdef CONFIG_MEMCG_SWAP 5805#ifdef CONFIG_MEMCG_SWAP
5806static struct mem_cgroup *mem_cgroup_id_get_online(struct mem_cgroup *memcg)
5807{
5808 while (!atomic_inc_not_zero(&memcg->id.ref)) {
5809 /*
5810 * The root cgroup cannot be destroyed, so it's refcount must
5811 * always be >= 1.
5812 */
5813 if (WARN_ON_ONCE(memcg == root_mem_cgroup)) {
5814 VM_BUG_ON(1);
5815 break;
5816 }
5817 memcg = parent_mem_cgroup(memcg);
5818 if (!memcg)
5819 memcg = root_mem_cgroup;
5820 }
5821 return memcg;
5822}
5823
5824/** 5824/**
5825 * mem_cgroup_swapout - transfer a memsw charge to swap 5825 * mem_cgroup_swapout - transfer a memsw charge to swap
5826 * @page: page whose memsw charge to transfer 5826 * @page: page whose memsw charge to transfer