From 7876f930d0e78addc6bbdbba0d6c196a0788d545 Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@kernel.org>
Date: Thu, 9 Jul 2015 16:39:49 -0400
Subject: blkcg: implement all_blkcgs list

Add all_blkcgs list goes through blkcg->all_blkcgs_node and is
protected by blkcg_pol_mutex.  This will be used to fix
blkcg_policy_data allocation bug.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Arianna Avanzini <avanzini.arianna@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
---
 include/linux/blk-cgroup.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'include/linux/blk-cgroup.h')

diff --git a/include/linux/blk-cgroup.h b/include/linux/blk-cgroup.h
index 58cfab80dd70..cf3e7bc22ef3 100644
--- a/include/linux/blk-cgroup.h
+++ b/include/linux/blk-cgroup.h
@@ -47,6 +47,7 @@ struct blkcg {
 
 	struct blkcg_policy_data	*pd[BLKCG_MAX_POLS];
 
+	struct list_head		all_blkcgs_node;
 #ifdef CONFIG_CGROUP_WRITEBACK
 	struct list_head		cgwb_list;
 #endif
-- 
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