1 files changed, 13 insertions, 13 deletions

diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c
index 479a1e7..8a5ac8c 100644
--- a/mm/mmu_notifier.c
+++ b/mm/mmu_notifier.c
@@ -196,28 +196,28 @@ static int do_mmu_notifier_register(struct mmu_notifier *mn,
 	BUG_ON(atomic_read(&mm->mm_users) <= 0);
 
 	/*
-	* Verify that mmu_notifier_init() already run and the global srcu is
-	* initialized.
-	*/
+	 * Verify that mmu_notifier_init() already run and the global srcu is
+	 * initialized.
+	 */
 	BUG_ON(!srcu.per_cpu_ref);
 
+	ret = -ENOMEM;
+	mmu_notifier_mm = kmalloc(sizeof(struct mmu_notifier_mm), GFP_KERNEL);
+	if (unlikely(!mmu_notifier_mm))
+		goto out;
+
 	if (take_mmap_sem)
 		down_write(&mm->mmap_sem);
 	ret = mm_take_all_locks(mm);
 	if (unlikely(ret))
-		goto out;
+		goto out_clean;
 
 	if (!mm_has_notifiers(mm)) {
-		mmu_notifier_mm = kmalloc(sizeof(struct mmu_notifier_mm),
-					GFP_KERNEL);
-		if (unlikely(!mmu_notifier_mm)) {
-			ret = -ENOMEM;
-			goto out_of_mem;
-		}
 		INIT_HLIST_HEAD(&mmu_notifier_mm->list);
 		spin_lock_init(&mmu_notifier_mm->lock);
 
 		mm->mmu_notifier_mm = mmu_notifier_mm;
+		mmu_notifier_mm = NULL;
 	}
 	atomic_inc(&mm->mm_count);
 
@@ -233,12 +233,12 @@ static int do_mmu_notifier_register(struct mmu_notifier *mn,
 	hlist_add_head(&mn->hlist, &mm->mmu_notifier_mm->list);
 	spin_unlock(&mm->mmu_notifier_mm->lock);
 
-out_of_mem:
 	mm_drop_all_locks(mm);
-out:
+out_clean:
 	if (take_mmap_sem)
 		up_write(&mm->mmap_sem);
-
+	kfree(mmu_notifier_mm);
+out:
 	BUG_ON(atomic_read(&mm->mm_users) <= 0);
 	return ret;
 }