[PATCH] Remove 200 bogus `unused' warnings.

From: Rusty Russell (rusty@linuxcare.com.au)
Date: Wed Apr 19 2000 - 05:33:15 EST


Linus, please apply this fucking patch to 2.3.

All the bogus warnings are pissing me off.

        ip_queue.c:542: warning: `init' defined but not used

Patch kudos to Jakub Jelinek,
Rusty.
--- linux/include/linux/init.h.jj Sat Jan 29 21:21:06 2000
+++ linux/include/linux/init.h Wed Mar 15 08:44:41 2000
@@ -98,8 +98,21 @@ extern struct kernel_param __setup_start
 
 /* Not sure what version aliases were introduced in, but certainly in 2.91.66. */
 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 91)
-#define module_init(x) int init_module(void) __attribute__((alias(#x)));
-#define module_exit(x) void cleanup_module(void) __attribute__((alias(#x)));
+/* These macros create a dummy inline: gcc 2.9x does not count alias
+ as usage, hence the `unused function' warning when __init functions
+ are declared static. We use the dummy __*_module_inline functions
+ both to kill the warning and check the type of the init/cleanup
+ function. */
+typedef int (*__init_module_func_t)(void);
+typedef void (*__cleanup_module_func_t)(void);
+#define module_init(x) \
+int init_module(void) __attribute__((alias(#x))); \
+extern inline __init_module_func_t __init_module_inline(void) \
+{ return x; }
+#define module_exit(x) \
+void cleanup_module(void) __attribute__((alias(#x))); \
+extern inline __cleanup_module_func_t __cleanup_module_inline(void) \
+{ return x; }
 #else
 #define module_init(x) int init_module(void) { return x(); }
 #define module_exit(x) void cleanup_module(void) { x(); }

--
Hacking time.

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