Re: [kbuild 4/5] Include type information as module info where possible

[Andreas Gruenbacher <agruen@suse.de>]

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On Sunday 30 January 2005 16:56, Sam Ravnborg wrote:
> Rusty got the original patch applied.

Not completely. The fix is attached.

Cheers,
-- 
Andreas Gruenbacher <agruen@suse.de>
SUSE Labs, SUSE LINUX PRODUCTS GMBH

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From: Andreas Gruenbacher <agruen@suse.de>
Subject: Module parameter type fixes

The wrong version of the parmtype patch was merged, incompletely, and
the part that got merged got broken on the way.  Here are the fixes:

Move __MODULE_INFO to modparam.h: This macro is used in modparam.h;
there are users who include this header but not module.h.  The latter
includes modparam.h already.

__MODULE_INFO(parmtype, name##type, #name ":" #type) does not evaluate
to __MODULE_INFO(parmtype, footype, "foo:int") as was the idea, but to
__MODULE_INFO(parmtype, fooint, "foo:int") when type is bound to int.
In more complicated cases, we get syntax erros.  Re-introduce the
__MODULE_PARM_TYPE macro; this is cleaner than renaming the type parameter.

Add the parmtype definition which was dropped during the merge to to the
obsolete but still heavily used MODULE_PARM macro.

Signed-off-by: Andreas Gruenbacher <agruen@suse.de>

Index: linux-2.6.11-rc2-bk8/include/linux/module.h
===================================================================
--- linux-2.6.11-rc2-bk8.orig/include/linux/module.h
+++ linux-2.6.11-rc2-bk8/include/linux/module.h
@@ -77,24 +77,14 @@ void sort_main_extable(void);
 extern struct subsystem module_subsys;
 
 #ifdef MODULE
-#define ___module_cat(a,b) __mod_ ## a ## b
-#define __module_cat(a,b) ___module_cat(a,b)
-#define __MODULE_INFO(tag, name, info)					  \
-static const char __module_cat(name,__LINE__)[]				  \
-  __attribute_used__							  \
-  __attribute__((section(".modinfo"),unused)) = __stringify(tag) "=" info
-
 #define MODULE_GENERIC_TABLE(gtype,name)			\
 extern const struct gtype##_id __mod_##gtype##_table		\
   __attribute__ ((unused, alias(__stringify(name))))
 
 extern struct module __this_module;
 #define THIS_MODULE (&__this_module)
-
 #else  /* !MODULE */
-
 #define MODULE_GENERIC_TABLE(gtype,name)
-#define __MODULE_INFO(tag, name, info)
 #define THIS_MODULE ((struct module *)0)
 #endif
 
@@ -560,7 +550,8 @@ static inline void MODULE_PARM_(void) { 
 /* DEPRECATED: Do not use. */
 #define MODULE_PARM(var,type)						    \
 struct obsolete_modparm __parm_##var __attribute__((section("__obsparm"))) = \
-{ __stringify(var), type, &MODULE_PARM_ };
+{ __stringify(var), type, &MODULE_PARM_ }; \
+__MODULE_PARM_TYPE(var, type);
 #else
 #define MODULE_PARM(var,type) static void __attribute__((__unused__)) *__parm_##var = &MODULE_PARM_;
 #endif
Index: linux-2.6.11-rc2-bk8/include/linux/moduleparam.h
===================================================================
--- linux-2.6.11-rc2-bk8.orig/include/linux/moduleparam.h
+++ linux-2.6.11-rc2-bk8/include/linux/moduleparam.h
@@ -13,6 +13,19 @@
 #define MODULE_PARAM_PREFIX __stringify(KBUILD_MODNAME) "."
 #endif
 
+#ifdef MODULE
+#define ___module_cat(a,b) __mod_ ## a ## b
+#define __module_cat(a,b) ___module_cat(a,b)
+#define __MODULE_INFO(tag, name, info)					  \
+static const char __module_cat(name,__LINE__)[]				  \
+  __attribute_used__							  \
+  __attribute__((section(".modinfo"),unused)) = __stringify(tag) "=" info
+#else  /* !MODULE */
+#define __MODULE_INFO(tag, name, info)
+#endif
+#define __MODULE_PARM_TYPE(name, _type)					  \
+  __MODULE_INFO(parmtype, name##type, #name ":" _type)
+
 struct kernel_param;
 
 /* Returns 0, or -errno.  arg is in kp->arg. */
@@ -65,7 +78,7 @@ struct kparam_array
 #define module_param_named(name, value, type, perm)			   \
 	param_check_##type(name, &(value));				   \
 	module_param_call(name, param_set_##type, param_get_##type, &value, perm); \
-	__MODULE_INFO(parmtype, name##type, #name ":" #type)
+	__MODULE_PARM_TYPE(name, #type)
 
 #define module_param(name, type, perm)				\
 	module_param_named(name, name, type, perm)
@@ -76,7 +89,7 @@ struct kparam_array
 		= { len, string };					\
 	module_param_call(name, param_set_copystring, param_get_string,	\
 		   &__param_string_##name, perm);			\
-	__MODULE_INFO(parmtype, name##type, #name ":string")
+	__MODULE_PARM_TYPE(name, "string")
 
 /* Called on module insert or kernel boot */
 extern int parse_args(const char *name,
@@ -138,7 +151,7 @@ extern int param_get_invbool(char *buffe
 	    sizeof(array[0]), array };					\
 	module_param_call(name, param_array_set, param_array_get, 	\
 			  &__param_arr_##name, perm);			\
-	__MODULE_INFO(parmtype, name##type, #name ":array of " #type)
+	__MODULE_PARM_TYPE(name, "array of " #type)
 
 #define module_param_array(name, type, nump, perm)		\
 	module_param_array_named(name, name, type, nump, perm)