diff options
Diffstat (limited to 'include/common.h')
| -rw-r--r-- | include/common.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/common.h b/include/common.h index d0f57040ee..26e1b469a1 100644 --- a/include/common.h +++ b/include/common.h @@ -176,6 +176,17 @@ typedef void (interrupt_handler_t)(void *); (__x > __y) ? __x : __y; }) +/** + * 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) );}) + /* * Function Prototypes */ |