commit a13812683f1118ee4deed88d8d9bc2c268358b2e
author Li Zefan <lizefan@huawei.com> Wed Jul 30 15:07:13 2014 +0800
committer Tejun Heo <tj@kernel.org> Wed Jul 30 11:26:58 2014 -0400
tree ca8f04658aba2a9b16a755c7b402426d8301d1b1
parent 5de4fa13c4df302db41e80ca679df24fdad0d661

cpuset: fix the WARN_ON() in update_nodemasks_hier()

The WARN_ON() is used to check if we break the legal hierarchy, on
which the effective mems should be equal to configured mems.

Reported-by: Mike Qiu <qiudayu@linux.vnet.ibm.com>
Tested-by: Mike Qiu <qiudayu@linux.vnet.ibm.com>
Signed-off-by: Li Zefan <lizefan@huawei.com>

kernel/cpuset.c

diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index f337f42..9d7264b 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -1136,7 +1136,7 @@
 		mutex_unlock(&callback_mutex);
 
 		WARN_ON(!cgroup_on_dfl(cp->css.cgroup) &&
-			nodes_equal(cp->mems_allowed, cp->effective_mems));
+			!nodes_equal(cp->mems_allowed, cp->effective_mems));
 
 		update_tasks_nodemask(cp);