Re: [PATCH 16/21] KGDB: This allows for KGDB to better deal with autoloaded modules.

[Jan Kiszka <jan.kiszka@siemens.com>]

Jason Wessel wrote:
> Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
> 
...
> --- linux-2.6-kgdb.orig/kernel/module.c
> +++ linux-2.6-kgdb/kernel/module.c
> @@ -65,6 +65,7 @@ extern int module_sysfs_initialized;
>   * (add/delete uses stop_machine). */
>  static DEFINE_MUTEX(module_mutex);
>  static LIST_HEAD(modules);
> +static DECLARE_MUTEX(notify_mutex);

These days, notify_mutex should better be a real mutex.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

---
 kernel/module.c |   14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

Index: b/kernel/module.c
===================================================================
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -66,7 +66,7 @@ extern int module_sysfs_initialized;
  * (add/delete uses stop_machine). */
 static DEFINE_MUTEX(module_mutex);
 static LIST_HEAD(modules);
-static DECLARE_MUTEX(notify_mutex);
+static DEFINE_MUTEX(notify_mutex);
 
 static BLOCKING_NOTIFIER_HEAD(module_notify_list);
 
@@ -712,10 +712,10 @@ sys_delete_module(const char __user *nam
 	if (ret != 0)
 		goto out;
 
-	down(&notify_mutex);
+	mutex_lock(&notify_mutex);
 	blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_GOING,
 								 mod);
-	up(&notify_mutex);
+	mutex_unlock(&notify_mutex);
 
 
 	/* Never wait if forced. */
@@ -730,10 +730,10 @@ sys_delete_module(const char __user *nam
 	}
 	free_module(mod);
 
-	down(&notify_mutex);
+	mutex_lock(&notify_mutex);
 	blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_GONE,
 			NULL);
-	up(&notify_mutex);
+	mutex_unlock(&notify_mutex);
 
  out:
 	mutex_unlock(&module_mutex);
@@ -2182,11 +2182,11 @@ sys_init_module(void __user *umod,
 		/* Init routine failed: abort.  Try to protect us from
                    buggy refcounters. */
 		mod->state = MODULE_STATE_GOING;
-		down(&notify_mutex);
+		mutex_lock(&notify_mutex);
 		blocking_notifier_call_chain(&module_notify_list,
 				MODULE_STATE_GOING,
 				mod);
-		up(&notify_mutex);
+		mutex_unlock(&notify_mutex);
 		synchronize_sched();
 		module_put(mod);
 		mutex_lock(&module_mutex);