Linux内核基础篇——container
Linux内核中经常可见container_of的身影，它在实际驱动的编写中也是广泛应用。
container_of原理
作用：通过结构体的某个成员变量地址找到该结构体的首地址。
定义如下：
/** * container_of - cast a member of a structure out to the containing structure * @ptr: the pointer to the member. * @type: the type of the container struct this is embedded in. * @member: the name of the member within the struct. * */ #define container_of(ptr, type, member) ({ const typeof( ((type *)0)->member ) *__mptr = (ptr); (type *)( (char *)__mptr - offsetof(type,member) );})登录后复制
