1 files changed, 9 insertions, 0 deletions
diff --git a/misc.h b/misc.h
new file mode 100644
index 0000000..92a66bc
--- /dev/null
+++ b/misc.h
@@ -0,0 +1,9 @@
+/*
+ * misc useful #defines ...
+ */
+
+#define container_of(ptr, type, member) ({			\
+        const typeof( ((type *)0)->member ) *__mptr = (ptr);	\
+        (type *)( (char *)__mptr - offsetof(type,member) );})
+
+#define array_size(x) (sizeof(x)/sizeof(x[0]))