1 // SPDX-License-Identifier: GPL-2.0
13 #define ID_MASK (BIT(ID_SHIFT) - 1)
15 	atomic_t ids;  member
28 	unsigned int old_ids = atomic_read(&map[offset / ID_PER_SC].ids);  in __swap_cgroup_id_lookup()
43 	unsigned int new_ids, old_ids = atomic_read(&sc->ids);  in __swap_cgroup_id_xchg()
49 	} while (!atomic_try_cmpxchg(&sc->ids, &old_ids, new_ids));  in __swap_cgroup_id_xchg()
55  * swap_cgroup_record - record mem_cgroup for a set of swap entries.
83  * swap_cgroup_clear - clear mem_cgroup for a set of swap entries.
115  * lookup_swap_cgroup_id - lookup mem_cgroup id tied to swap entry
122 	struct swap_cgroup_ctrl *ctrl;  in lookup_swap_cgroup_id()  local
127 	ctrl = &swap_cgroup_ctrl[swp_type(ent)];  in lookup_swap_cgroup_id()
128 	return __swap_cgroup_id_lookup(ctrl->map, swp_offset(ent));  in lookup_swap_cgroup_id()
134 	struct swap_cgroup_ctrl *ctrl;  in swap_cgroup_swapon()  local
146 	ctrl = &swap_cgroup_ctrl[type];  in swap_cgroup_swapon()
148 	ctrl->map = map;  in swap_cgroup_swapon()
155 	return -ENOMEM;  in swap_cgroup_swapon()
161 	struct swap_cgroup_ctrl *ctrl;  in swap_cgroup_swapoff()  local
167 	ctrl = &swap_cgroup_ctrl[type];  in swap_cgroup_swapoff()
168 	map = ctrl->map;  in swap_cgroup_swapoff()
169 	ctrl->map = NULL;  in swap_cgroup_swapoff()