Signed-off-by: Tomeu Vizoso <[email protected]>
---
include/linux/stddef.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/include/linux/stddef.h b/include/linux/stddef.h
index 9c61c7cda936..e60bd164c03a 100644
--- a/include/linux/stddef.h
+++ b/include/linux/stddef.h
@@ -27,4 +27,11 @@ enum {
#define offsetofend(TYPE, MEMBER) \
(offsetof(TYPE, MEMBER) + sizeof(((TYPE *)0)->MEMBER))
+#define typecheck_member(TYPE, MEMBER, MEMBERTYPE) \
+ ((size_t)(&((TYPE *)0)->MEMBER - (MEMBERTYPE*)0) ? 0 : 0)
+
+/* like offsetof(), but ensures that MEMBER is of type MEMBERTYPE */
+#define offsetof_t(TYPE, MEMBER, MEMBERTYPE) \
+ (typecheck_member(TYPE, MEMBER, MEMBERTYPE) + offsetof(TYPE, MEMBER))
+
#endif
--
2.4.3
--
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