From ff90af6c73883121358251bba66245ff4da3755c Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Wed, 28 Dec 2016 00:36:01 +0900
Subject: [PATCH] typecheck: import include/linux/typecheck.h from Linux 4.9
Copied from Linux 4.9.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---
include/linux/typecheck.h | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
create mode 100644 include/linux/typecheck.h
diff --git a/include/linux/typecheck.h b/include/linux/typecheck.h
new file mode 100644
index 0000000000..eb5b74a575
--- /dev/null
+++ b/include/linux/typecheck.h
@@ -0,0 +1,24 @@
+#ifndef TYPECHECK_H_INCLUDED
+#define TYPECHECK_H_INCLUDED
+
+/*
+ * Check at compile time that something is of a particular type.
+ * Always evaluates to 1 so you may use it easily in comparisons.
+ */
+#define typecheck(type,x) \
+({ type __dummy; \
+ typeof(x) __dummy2; \
+ (void)(&__dummy == &__dummy2); \
+ 1; \
+})
+
+/*
+ * Check at compile time that 'function' is a certain type, or is a pointer
+ * to that type (needs to use typedef for the function type.)
+ */
+#define typecheck_fn(type,function) \
+({ typeof(type) __tmp = function; \
+ (void)__tmp; \
+})
+
+#endif /* TYPECHECK_H_INCLUDED */
--
2.39.5