Replace list.h undefined behavior with offsetof.

5 years ago · d741e61abd
parent 030907d14b
commit d741e61abd
1 changed files with 4 additions and 2 deletions
--- a/src/list.h
+++ b/src/list.h
@ -4,6 +4,8 @@
 #ifndef __LINUX_LIST_H
 #define __LINUX_LIST_H

+#include <stddef.h> /* offsetof */
+
 #ifdef _MSC_VER
 #define __inline__ __inline
 #endif
@ -136,7 +138,7 @@ static __inline__ void list_splice(struct list_head *list, struct list_head *hea
 * @member:	the name of the list_struct within the struct.
 */
 #define list_entry(ptr, type, member) \
-	((type *)((char *)(ptr)-(size_t)(&((type *)0)->member)))
+	((type *)((char *)(ptr) - offsetof(type, member)))

 /**
 * list_for_each	-	iterate over a list