1 files changed, 8 insertions, 0 deletions
diff --git a/include/c.h b/include/c.h
index c4a95aa2b..073615ef3 100644
--- a/include/c.h
+++ b/include/c.h
@@ -104,6 +104,14 @@
 	_max1 > _max2 ? _max1 : _max2; })
 #endif
 
+#ifndef offsetof
+#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+#endif
+
+#define container_of(ptr, type, member) ({                       \
+	const __typeof__( ((type *)0)->member ) *__mptr = (ptr); \
+	(type *)( (char *)__mptr - offsetof(type,member) );})
+
 #ifndef HAVE_PROGRAM_INVOCATION_SHORT_NAME
 # ifdef HAVE___PROGNAME
 extern char *__progname;