module: add within_module() function

It is just a small optimization that allows to replace few
occurrences of within_module_init() || within_module_core()
with a single call.

Signed-off-by: Petr Mladek <pmladek@suse.cz>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/include/linux/module.h b/include/linux/module.h
index f520a76..61d8fb2 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -408,6 +408,11 @@
 	       addr < (unsigned long)mod->module_init + mod->init_size;
 }
 
+static inline int within_module(unsigned long addr, const struct module *mod)
+{
+	return within_module_init(addr, mod) || within_module_core(addr, mod);
+}
+
 /* Search for module by name: must hold module_mutex. */
 struct module *find_module(const char *name);