sched: Prevent balance_push() on remote runqueues

[linux-2.6-microblaze.git] / lib / once.c

diff --git a/lib/once.c b/lib/once.c
index 8b7d623..59149bf 100644 (file)
--- a/lib/once.c
+++ b/lib/once.c
@@ -3,10 +3,12 @@
 #include <linux/spinlock.h>
 #include <linux/once.h>
 #include <linux/random.h>
+#include <linux/module.h>
 
 struct once_work {
        struct work_struct work;
        struct static_key_true *key;
+       struct module *module;
 };
 
 static void once_deferred(struct work_struct *w)
@@ -16,10 +18,11 @@ static void once_deferred(struct work_struct *w)
        work = container_of(w, struct once_work, work);
        BUG_ON(!static_key_enabled(work->key));
        static_branch_disable(work->key);
+       module_put(work->module);
        kfree(work);
 }
 
-static void once_disable_jump(struct static_key_true *key)
+static void once_disable_jump(struct static_key_true *key, struct module *mod)
 {
        struct once_work *w;
 
@@ -29,6 +32,8 @@ static void once_disable_jump(struct static_key_true *key)
 
        INIT_WORK(&w->work, once_deferred);
        w->key = key;
+       w->module = mod;
+       __module_get(mod);
        schedule_work(&w->work);
 }
 
@@ -53,11 +58,11 @@ bool __do_once_start(bool *done, unsigned long *flags)
 EXPORT_SYMBOL(__do_once_start);
 
 void __do_once_done(bool *done, struct static_key_true *once_key,
-                   unsigned long *flags)
+                   unsigned long *flags, struct module *mod)
        __releases(once_lock)
 {
        *done = true;
        spin_unlock_irqrestore(&once_lock, *flags);
-       once_disable_jump(once_key);
+       once_disable_jump(once_key, mod);
 }
 EXPORT_SYMBOL(__do_once_done);