208 } mc = {  variable
209 	.lock = __SPIN_LOCK_UNLOCKED(mc.lock),
210 	.waitq = __WAIT_QUEUE_HEAD_INITIALIZER(mc.waitq),
1213 	spin_lock(&mc.lock);  in mem_cgroup_under_move()
1214 	from = mc.from;  in mem_cgroup_under_move()
1215 	to = mc.to;  in mem_cgroup_under_move()
1222 	spin_unlock(&mc.lock);  in mem_cgroup_under_move()
1228 	if (mc.moving_task && current != mc.moving_task) {  in mem_cgroup_wait_acct_move()
1231 			prepare_to_wait(&mc.waitq, &wait, TASK_INTERRUPTIBLE);  in mem_cgroup_wait_acct_move()
1233 			if (mc.moving_task)  in mem_cgroup_wait_acct_move()
1235 			finish_wait(&mc.waitq, &wait);  in mem_cgroup_wait_acct_move()
4405 	ret = try_charge(mc.to, GFP_KERNEL & ~__GFP_DIRECT_RECLAIM, count);  in mem_cgroup_do_precharge()
4407 		mc.precharge += count;  in mem_cgroup_do_precharge()
4413 		ret = try_charge(mc.to, GFP_KERNEL & ~__GFP_NORETRY, 1);  in mem_cgroup_do_precharge()
4416 		mc.precharge++;  in mem_cgroup_do_precharge()
4459 		if (!(mc.flags & MOVE_ANON))  in mc_handle_present_pte()
4462 		if (!(mc.flags & MOVE_FILE))  in mc_handle_present_pte()
4478 	if (!(mc.flags & MOVE_ANON) || non_swap_entry(ent))  in mc_handle_swap_pte()
4507 	if (!(mc.flags & MOVE_FILE))  in mc_handle_file_pte()
4658 		if (page->mem_cgroup == mc.from) {  in get_mctgt_type()
4668 	    mem_cgroup_id(mc.from) == lookup_swap_cgroup_id(ent)) {  in get_mctgt_type()
4690 	if (!(mc.flags & MOVE_ANON))  in get_mctgt_type_thp()
4692 	if (page->mem_cgroup == mc.from) {  in get_mctgt_type_thp()
4719 			mc.precharge += HPAGE_PMD_NR;  in mem_cgroup_count_precharge_pte_range()
4729 			mc.precharge++;	/* increment precharge temporarily */  in mem_cgroup_count_precharge_pte_range()
4748 	precharge = mc.precharge;  in mem_cgroup_count_precharge()
4749 	mc.precharge = 0;  in mem_cgroup_count_precharge()
4758 	VM_BUG_ON(mc.moving_task);  in mem_cgroup_precharge_mc()
4759 	mc.moving_task = current;  in mem_cgroup_precharge_mc()
4766 	struct mem_cgroup *from = mc.from;  in __mem_cgroup_clear_mc()
4767 	struct mem_cgroup *to = mc.to;  in __mem_cgroup_clear_mc()
4770 	if (mc.precharge) {  in __mem_cgroup_clear_mc()
4771 		cancel_charge(mc.to, mc.precharge);  in __mem_cgroup_clear_mc()
4772 		mc.precharge = 0;  in __mem_cgroup_clear_mc()
4778 	if (mc.moved_charge) {  in __mem_cgroup_clear_mc()
4779 		cancel_charge(mc.from, mc.moved_charge);  in __mem_cgroup_clear_mc()
4780 		mc.moved_charge = 0;  in __mem_cgroup_clear_mc()
4783 	if (mc.moved_swap) {  in __mem_cgroup_clear_mc()
4785 		if (!mem_cgroup_is_root(mc.from))  in __mem_cgroup_clear_mc()
4786 			page_counter_uncharge(&mc.from->memsw, mc.moved_swap);  in __mem_cgroup_clear_mc()
4792 		if (!mem_cgroup_is_root(mc.to))  in __mem_cgroup_clear_mc()
4793 			page_counter_uncharge(&mc.to->memory, mc.moved_swap);  in __mem_cgroup_clear_mc()
4795 		css_put_many(&mc.from->css, mc.moved_swap);  in __mem_cgroup_clear_mc()
4798 		mc.moved_swap = 0;  in __mem_cgroup_clear_mc()
4802 	wake_up_all(&mc.waitq);  in __mem_cgroup_clear_mc()
4807 	struct mm_struct *mm = mc.mm;  in mem_cgroup_clear_mc()
4813 	mc.moving_task = NULL;  in mem_cgroup_clear_mc()
4815 	spin_lock(&mc.lock);  in mem_cgroup_clear_mc()
4816 	mc.from = NULL;  in mem_cgroup_clear_mc()
4817 	mc.to = NULL;  in mem_cgroup_clear_mc()
4818 	mc.mm = NULL;  in mem_cgroup_clear_mc()
4819 	spin_unlock(&mc.lock);  in mem_cgroup_clear_mc()
4871 		VM_BUG_ON(mc.from);  in mem_cgroup_can_attach()
4872 		VM_BUG_ON(mc.to);  in mem_cgroup_can_attach()
4873 		VM_BUG_ON(mc.precharge);  in mem_cgroup_can_attach()
4874 		VM_BUG_ON(mc.moved_charge);  in mem_cgroup_can_attach()
4875 		VM_BUG_ON(mc.moved_swap);  in mem_cgroup_can_attach()
4877 		spin_lock(&mc.lock);  in mem_cgroup_can_attach()
4878 		mc.mm = mm;  in mem_cgroup_can_attach()
4879 		mc.from = from;  in mem_cgroup_can_attach()
4880 		mc.to = memcg;  in mem_cgroup_can_attach()
4881 		mc.flags = move_flags;  in mem_cgroup_can_attach()
4882 		spin_unlock(&mc.lock);  in mem_cgroup_can_attach()
4896 	if (mc.to)  in mem_cgroup_cancel_attach()
4923 		if (mc.precharge < HPAGE_PMD_NR) {  in mem_cgroup_move_charge_pte_range()
4932 							     mc.from, mc.to)) {  in mem_cgroup_move_charge_pte_range()
4933 					mc.precharge -= HPAGE_PMD_NR;  in mem_cgroup_move_charge_pte_range()
4934 					mc.moved_charge += HPAGE_PMD_NR;  in mem_cgroup_move_charge_pte_range()
4952 		if (!mc.precharge)  in mem_cgroup_move_charge_pte_range()
4960 			if (!mem_cgroup_move_account(page, 1, mc.from, mc.to)) {  in mem_cgroup_move_charge_pte_range()
4961 				mc.precharge--;  in mem_cgroup_move_charge_pte_range()
4963 				mc.moved_charge++;  in mem_cgroup_move_charge_pte_range()
4971 			if (!mem_cgroup_move_swap_account(ent, mc.from, mc.to)) {  in mem_cgroup_move_charge_pte_range()
4972 				mc.precharge--;  in mem_cgroup_move_charge_pte_range()
4974 				mc.moved_swap++;  in mem_cgroup_move_charge_pte_range()
5003 		.mm = mc.mm,  in mem_cgroup_move_charge()
5012 	atomic_inc(&mc.from->moving_account);  in mem_cgroup_move_charge()
5015 	if (unlikely(!down_read_trylock(&mc.mm->mmap_sem))) {  in mem_cgroup_move_charge()
5032 	up_read(&mc.mm->mmap_sem);  in mem_cgroup_move_charge()
5033 	atomic_dec(&mc.from->moving_account);  in mem_cgroup_move_charge()
5038 	if (mc.to) {  in mem_cgroup_move_task()