[PATCH] mutex subsystem, add typecheck_fn(type, function)

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

Modified-by: Ingo Molnar <mingo@elte.hu>

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

Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 9 insertions, 0 deletions

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index ca7ff8fdd090..d0e6ca3b00ef 100644
--- a/include/linux/kernel.h
+++ b/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