cgroup,rcu: convert call_rcu(free_css_set_rcu) to kfree_rcu() (30088ad8) · Commits · 戴 / test

The rcu callback free_css_set_rcu() just calls a kfree(), so we use kfree_rcu() instead of the call_rcu(free_css_set_rcu). Signed-off-by:

kernel/cgroup.c

+1 −7

Original line number	Diff line number	Diff line
		@@ -326,12 +326,6 @@ static struct hlist_head css_set_hash(struct cgroup_subsys_state css[])
		return &css_set_table[index];
		}

		static void free_css_set_rcu(struct rcu_head *obj)
		{
		struct css_set *cg = container_of(obj, struct css_set, rcu_head);
		kfree(cg);
		}

		/* We don't maintain the lists running through each css_set to its
		* task until after the first call to cgroup_iter_start(). This
		* reduces the fork()/exit() overhead for people who have cgroups
		@@ -375,7 +369,7 @@ static void __put_css_set(struct css_set *cg, int taskexit)
		}

		write_unlock(&css_set_lock);
		call_rcu(&cg->rcu_head, free_css_set_rcu);
		kfree_rcu(cg, rcu_head);
		}

		/*