net/core/netprio_cgroup.c

29  * netprio allocates per-net_device priomap array which is indexed by
37  * Extend @dev->priomap so that it's large enough to accommodate
38  * @target_idx.  @dev->priomap.priomap_len > @target_idx after successful
46 	/* is the existing priomap large enough? */
47 	old = rtnl_dereference(dev->priomap);
58 		new_len = (new_sz - offsetof(struct netprio_map, priomap)) /
59 			sizeof(new->priomap[0]);
74 		memcpy(new->priomap, old->priomap,
75 		       old->priomap_len * sizeof(old->priomap[0]));
79 	/* install the new priomap */
80 	rcu_assign_pointer(dev->priomap, new);
95 	struct netprio_map *map = rcu_dereference_rtnl(dev->priomap);
99 		return map->priomap[id];
119 	/* avoid extending priomap for zero writes */
120 	map = rtnl_dereference(dev->priomap);
128 	map = rtnl_dereference(dev->priomap);
129 	map->priomap[id] = prio;
277 		old = rtnl_dereference(dev->priomap);
278 		RCU_INIT_POINTER(dev->priomap, NULL);