inter_module_* backport to 2.2.18

@@ -9,4 +9,5 @@
 
 #include <linux/config.h>
+#include <linux/list.h>
 
 #ifdef __GENKSYMS__

@@ -148,4 +149,38 @@ static inline unsigned long get_module_s
 extern unsigned long get_module_symbol(char *, char *);
 #endif
+
+/* Generic inter module communication.
+ *
+ * NOTE: This interface is intended for small amounts of data that are
+ *       passed between two objects and either or both of the objects
+ *       might be compiled as modules.  Do not over use this interface.
+ *
+ *       If more than two objects need to communicate then you probably
+ *       need a specific interface instead of abusing this generic
+ *       interface.  If both objects are *always* built into the kernel
+ *       then a global extern variable is good enough, you do not need
+ *       this interface.
+ *
+ * Keith Owens <[email protected]> 28 Oct 2000.
+ */
+
+#ifdef __KERNEL__
+#define HAVE_INTER_MODULE
+extern void inter_module_register(const char *, struct module *, const void *);
+extern void inter_module_unregister(const char *);
+extern const void *inter_module_get(const char *);
+extern const void *inter_module_get_request(const char *, const char *);
+extern void inter_module_put(const char *);
+
+struct inter_module_entry {
+	struct list_head list;
+	const char *im_name;
+	struct module *owner;
+	const void *userdata;
+};
+
+extern int try_inc_mod_count(struct module *mod);
+#endif /* __KERNEL__ */
+
 #if defined(MODULE) && !defined(__GENKSYMS__)
 

@@ -94,4 +94,11 @@ EXPORT_SYMBOL(get_module_symbol);
 EXPORT_SYMBOL(get_options);
 
+EXPORT_SYMBOL(inter_module_register);
+EXPORT_SYMBOL(inter_module_unregister);
+EXPORT_SYMBOL(inter_module_get);
+EXPORT_SYMBOL(inter_module_get_request);
+EXPORT_SYMBOL(inter_module_put);
+EXPORT_SYMBOL(try_inc_mod_count);
+
 /* process memory management */
 EXPORT_SYMBOL(do_mmap);

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