[patch 02/20] mutex subsystem, add typecheck_fn(type, function)

[Ingo Molnar]

From: Chuck Ebbert <76306.1226@xxxxxxxxxxxxxx>

add typecheck_fn(type, function) to do type-checking of function
pointers.

Modified-by: Ingo Molnar <mingo@xxxxxxx>

(made it typeof() based, instead of typedef based.)

Signed-off-by: Chuck Ebbert <76306.1226@xxxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>

----

 include/linux/kernel.h |    9 +++++++++
 1 files changed, 9 insertions(+)

Index: linux/include/linux/kernel.h
===================================================================
--- linux.orig/include/linux/kernel.h
+++ linux/include/linux/kernel.h
@@ -286,6 +286,15 @@ extern void dump_stack(void);
 	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 /* __KERNEL__ */
 
 #define SI_LOAD_SHIFT	16
-
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