From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Tue, 27 Dec 2016 15:36:01 +0000 (+0900)
Subject: typecheck: import include/linux/typecheck.h from Linux 4.9
X-Git-Tag: v2017.03-rc1~119
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ff90af6c73883121358251bba66245ff4da3755c;p=platform%2Fkernel%2Fu-boot.git

typecheck: import include/linux/typecheck.h from Linux 4.9

Copied from Linux 4.9.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---

diff --git a/include/linux/typecheck.h b/include/linux/typecheck.h
new file mode 100644
index 0000000..eb5b74a
--- /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 */