如何使用kernel中的list结构来保存自定义数据

1.首先定义自己所需的结构体。复制代码struct my_mapping_struct {struct list_head list;int file;void *virt;struct my_data *md;}复制代码2.定义并初始化一个全局的list head与一把mutex。static DEFINE_MUTEX(my_mutex);static LIST_HEAD(my_list_head);3.向list head中添加新元素。复制代码static int my_list_add(int file, void *virt, struct my_data *md){struct my_mapping_struct *node;node kmalloc(sizeof(struct my_mapping_struct), GFP_KERNEL);if (!node)return -NOMEM;node-file file;node-virt virt;node-md md;mutex_lock(my_mutex);list_add(node-list, my_list_head);mutex_unlock(my_mutex);return 0;}复制代码4.向list head中删除指定md元素。复制代码static int my_list_del(struct my_data *md){struct list_head *pos;struct my_mapping_struct *node;int is_found 0;mutex_lock(my_mutex); list_for_each(pos, my_list_head) { node container_of(pos, struct my_mapping_struct, list); if (node-md md) { list_del(node-list); kfree(node); is_found 1; break; } } mutex_unlock(my_mutex); return is_found?0:1;}复制代码5.在list head中查找特定md的元素。复制代码static struct my_data *my_find_node(void *virt){struct list_head *pos;struct my_mapping_struct *node;struct my_data *md NULL;mutex_lock(my_mutex); list_for_each(pos, my_list_head) { node container_of(pos, struct my_mapping_struct, list); if (node-virt virt) { md node-md; break; } } mutex_unlock(my_mutex); return md;}复制代码