Hi all, I am trying to include a list o devices to poll to. I am not very experienced but looking the current kernel code for wireless, I thought it would be a good idea to use a linked list list_head protected with RCU and one mutex for the add/delete parts. I would like to receive the next device to be poll from the list every time that someone calls the function instead of iterating the whole list every time to find out the next device to poll. Is it possible to use a pointer to the head and update the pointer to the next element of the list? I mean could i do something like this? The write side could be something like this: mutex_lock(&sdata->u.ap.polllist_mtx); list_add_rcu(poll_req->list, sdata->u.ap.polling_list); mutex_unlock(&sdata->u.ap.polllist_mtx); and the read side: rcu_read_lock(); rcu_derreference(sdata->u.ap.polling_list->sta); copy_sta(sdata->u.ap.polling_list->sta); rcu_read_unlock(); sdata->u.ap.polling_list = sdata.u.ap.polling_list->next; Do I need to use the same mutex or is this operation fast enought? Thank you in advance! -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
