2011/3/15 Lai Jiangshan <laijs@xxxxxxxxxxxxxx>:
>
>
> The rcu callback __free_css_id_cb() just calls a kfree(),
> so we use kfree_rcu() instead of the call_rcu(__free_css_id_cb).
>
> Signed-off-by: Lai Jiangshan <laijs@xxxxxxxxxxxxxx>
Acked-by: Paul Menage <menage@xxxxxxxxxx>
> ---
> kernel/cgroup.c | 10 +---------
> 1 files changed, 1 insertions(+), 9 deletions(-)
>
> diff --git a/kernel/cgroup.c b/kernel/cgroup.c
> index 5c83c91..b7d3f6d 100644
> --- a/kernel/cgroup.c
> +++ b/kernel/cgroup.c
> @@ -4612,14 +4612,6 @@ bool css_is_ancestor(struct cgroup_subsys_state *child,
> return ret;
> }
>
> -static void __free_css_id_cb(struct rcu_head *head)
> -{
> - struct css_id *id;
> -
> - id = container_of(head, struct css_id, rcu_head);
> - kfree(id);
> -}
> -
> void free_css_id(struct cgroup_subsys *ss, struct cgroup_subsys_state *css)
> {
> struct css_id *id = css->id;
> @@ -4634,7 +4626,7 @@ void free_css_id(struct cgroup_subsys *ss, struct cgroup_subsys_state *css)
> spin_lock(&ss->id_lock);
> idr_remove(&ss->idr, id->id);
> spin_unlock(&ss->id_lock);
> - call_rcu(&id->rcu_head, __free_css_id_cb);
> + kfree_rcu(id, rcu_head);
> }
> EXPORT_SYMBOL_GPL(free_css_id);
>
> --
> 1.7.4
>
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