Merge tag 'pm-fixes-for-3.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git...

[karo-tx-linux.git] / kernel / workqueue.c

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 42fa9ad0a810482494b5782f4ba9a23f4aa32b86..bec7b5b53e03db1d443a2f221255fd22344f4de4 100644 (file)
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -242,10 +242,10 @@ struct workqueue_struct {
 
        int                     nr_drainers;    /* W: drain in progress */
        int                     saved_max_active; /* W: saved cwq max_active */
-       const char              *name;          /* I: workqueue name */
 #ifdef CONFIG_LOCKDEP
        struct lockdep_map      lockdep_map;
 #endif
+       char                    name[];         /* I: workqueue name */
 };
 
 struct workqueue_struct *system_wq __read_mostly;
@@ -2954,14 +2954,29 @@ static int wq_clamp_max_active(int max_active, unsigned int flags,
        return clamp_val(max_active, 1, lim);
 }
 
-struct workqueue_struct *__alloc_workqueue_key(const char *name,
+struct workqueue_struct *__alloc_workqueue_key(const char *fmt,
                                               unsigned int flags,
                                               int max_active,
                                               struct lock_class_key *key,
-                                              const char *lock_name)
+                                              const char *lock_name, ...)
 {
+       va_list args, args1;
        struct workqueue_struct *wq;
        unsigned int cpu;
+       size_t namelen;
+
+       /* determine namelen, allocate wq and format name */
+       va_start(args, lock_name);
+       va_copy(args1, args);
+       namelen = vsnprintf(NULL, 0, fmt, args) + 1;
+
+       wq = kzalloc(sizeof(*wq) + namelen, GFP_KERNEL);
+       if (!wq)
+               goto err;
+
+       vsnprintf(wq->name, namelen, fmt, args1);
+       va_end(args);
+       va_end(args1);
 
        /*
         * Workqueues which may be used during memory reclaim should
@@ -2978,12 +2993,9 @@ struct workqueue_struct *__alloc_workqueue_key(const char *name,
                flags |= WQ_HIGHPRI;
 
        max_active = max_active ?: WQ_DFL_ACTIVE;
-       max_active = wq_clamp_max_active(max_active, flags, name);
-
-       wq = kzalloc(sizeof(*wq), GFP_KERNEL);
-       if (!wq)
-               goto err;
+       max_active = wq_clamp_max_active(max_active, flags, wq->name);
 
+       /* init wq */
        wq->flags = flags;
        wq->saved_max_active = max_active;
        mutex_init(&wq->flush_mutex);
@@ -2991,7 +3003,6 @@ struct workqueue_struct *__alloc_workqueue_key(const char *name,
        INIT_LIST_HEAD(&wq->flusher_queue);
        INIT_LIST_HEAD(&wq->flusher_overflow);
 
-       wq->name = name;
        lockdep_init_map(&wq->lockdep_map, lock_name, key, 0);
        INIT_LIST_HEAD(&wq->list);
 
@@ -3020,7 +3031,8 @@ struct workqueue_struct *__alloc_workqueue_key(const char *name,
                if (!rescuer)
                        goto err;
 
-               rescuer->task = kthread_create(rescuer_thread, wq, "%s", name);
+               rescuer->task = kthread_create(rescuer_thread, wq, "%s",
+                                              wq->name);
                if (IS_ERR(rescuer->task))
                        goto err;