diff mbox

[U-Boot,v2,3/5] typecheck: import include/linux/typecheck.h from Linux 4.9

Message ID 1482852963-6887-4-git-send-email-yamada.masahiro@socionext.com
State Accepted
Delegated to: Tom Rini
Headers show

Commit Message

Masahiro Yamada Dec. 27, 2016, 3:36 p.m. UTC 
Copied from Linux 4.9.

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

Changes in v2: None

 include/linux/typecheck.h | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 include/linux/typecheck.h

Comments

Tom Rini Jan. 15, 2017, 6:29 p.m. UTC | #1 
On Wed, Dec 28, 2016 at 12:36:01AM +0900, Masahiro Yamada wrote:

> Copied from Linux 4.9.
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

Applied to u-boot/master, thanks!
diff mbox

Patch

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 */