aio: cleanup: flatten kill_ioctx()

There is no need to have most of the code in kill_ioctx() indented.  Flatten
it.
Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>

fs/aio.c

@@ -730,39 +730,39 @@ static struct kioctx *ioctx_alloc(unsigned nr_events)
 static int kill_ioctx(struct mm_struct *mm, struct kioctx *ctx,
 		struct completion *requests_done)
 {
-	if (!atomic_xchg(&ctx->dead, 1)) {
-		struct kioctx_table *table;
+	struct kioctx_table *table;
 
-		spin_lock(&mm->ioctx_lock);
-		rcu_read_lock();
-		table = rcu_dereference(mm->ioctx_table);
+	if (atomic_xchg(&ctx->dead, 1))
+		return -EINVAL;
 
-		WARN_ON(ctx != table->table[ctx->id]);
-		table->table[ctx->id] = NULL;
-		rcu_read_unlock();
-		spin_unlock(&mm->ioctx_lock);
 
-		/* percpu_ref_kill() will do the necessary call_rcu() */
-		wake_up_all(&ctx->wait);
+	spin_lock(&mm->ioctx_lock);
+	rcu_read_lock();
+	table = rcu_dereference(mm->ioctx_table);
+
+	WARN_ON(ctx != table->table[ctx->id]);
+	table->table[ctx->id] = NULL;
+	rcu_read_unlock();
+	spin_unlock(&mm->ioctx_lock);
 
-		/*
-		 * It'd be more correct to do this in free_ioctx(), after all
-		 * the outstanding kiocbs have finished - but by then io_destroy
-		 * has already returned, so io_setup() could potentially return
-		 * -EAGAIN with no ioctxs actually in use (as far as userspace
-		 *  could tell).
-		 */
-		aio_nr_sub(ctx->max_reqs);
+	/* percpu_ref_kill() will do the necessary call_rcu() */
+	wake_up_all(&ctx->wait);
 
-		if (ctx->mmap_size)
-			vm_munmap(ctx->mmap_base, ctx->mmap_size);
+	/*
+	 * It'd be more correct to do this in free_ioctx(), after all
+	 * the outstanding kiocbs have finished - but by then io_destroy
+	 * has already returned, so io_setup() could potentially return
+	 * -EAGAIN with no ioctxs actually in use (as far as userspace
+	 *  could tell).
+	 */
+	aio_nr_sub(ctx->max_reqs);
 
-		ctx->requests_done = requests_done;
-		percpu_ref_kill(&ctx->users);
-		return 0;
-	}
+	if (ctx->mmap_size)
+		vm_munmap(ctx->mmap_base, ctx->mmap_size);
 
-	return -EINVAL;
+	ctx->requests_done = requests_done;
+	percpu_ref_kill(&ctx->users);
+	return 0;
 }
 
 /* wait_on_sync_kiocb: