[PATCH] Whine about suspicious return values from module's ->init() hook

[Alexey Dobriyan <adobriyan@sw.ru>]

One head-scratching session could be noticeably shorter with this patch...

Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
---

 kernel/module.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2171,6 +2171,12 @@ sys_init_module(void __user *umod,
 		wake_up(&module_wq);
 		return ret;
 	}
+	if (ret > 0) {
+		printk(KERN_WARNING "%s: '%s'->init suspiciously returned %d\n"
+		       KERN_WARNING "%s: loading module anyway...\n",
+		       __func__, mod->name, ret,
+		       __func__);
+	}
 
 	/* Now it's a first class citizen! */
 	mutex_lock(&module_mutex);