From: Chuck Ebbert <76306.1226@compuserve.com>
Date: Mon, 9 Jan 2006 23:59:17 +0000 (-0800)
Subject: [PATCH] mutex subsystem, add typecheck_fn(type, function)
X-Git-Tag: v2.6.16-rc1~655^2~16
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=711a660dc2064013a2b0167ee67389707fc9cac3;p=linux-2.6-omap-h63xx.git

[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>
---

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index ca7ff8fdd09..d0e6ca3b00e 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