6 #define MAX(a, b) ((a) > (b) ? (a) : (b))
7 #define MIN(a, b) ((a) < (b) ? (a) : (b))
10 * container_of - cast a member of a structure out to the containing structure
11 * @ptr: the pointer to the member.
12 * @type: the type of the container struct this is embedded in.
13 * @member: the name of the member within the struct.
16 #define container_of(ptr, type, member) ({ \
17 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
18 (type *)( (char *)__mptr - offsetof(type,member) );})