struct cgroup is made RCU-safe by synchronize_rcu() in cgroup_diput().
There is no reason to use RCU safe kfree on it after it. Remove
cgroup->rcu_head and use kfree() instead of kfree_rcu() in
cgroup_diput().
Signed-off-by: Tejun Heo <t...@kernel.org>
---
include/linux/cgroup.h | 3 ---
kernel/cgroup.c | 2 +-
2 files changed, 1 insertion(+), 4 deletions(-)
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index d605857..9dcbfa1 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -196,9 +196,6 @@ struct cgroup {
struct list_head pidlists;
struct mutex pidlist_mutex;
- /* For RCU-protected deletion */
- struct rcu_head rcu_head;
-
/* List of events which userspace want to receive */
struct list_head event_list;
spinlock_t event_list_lock;
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 278752e..a91e7ad 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -893,7 +893,7 @@ static void cgroup_diput(struct dentry *dentry, struct
inode *inode)
simple_xattrs_free(&cgrp->xattrs);
- kfree_rcu(cgrp, rcu_head);
+ kfree(cgrp);
} else {
struct cfent *cfe = __d_cfe(dentry);
struct cgroup *cgrp = dentry->d_parent->d_fsdata;
--
1.7.11.7
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