[PATCH 3/3] cpuset: two minor code-cleanups

[Lai Jiangshan <laijs@cn.fujitsu.com>]

in function cpuset_update_task_memory_state()
local variable
struct task_struct *tsk = current;

and local variable tsk is used 14 times and
statement task_cs(tsk) is used twice in this function.
So using task_cs(tsk) instead of task_cs(current) is
better for readability.

And "(struct cgroup_scanner *)&scan" is not good for
readability also. (and "container_of" is used in cpuset_do_move_task(),
not "(cpuset_hotplug_scanner *)scan")

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
---
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 798b3ab..4513deb 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -369,7 +369,7 @@ void cpuset_update_task_memory_state(void)
 		my_cpusets_mem_gen = top_cpuset.mems_generation;
 	} else {
 		rcu_read_lock();
-		my_cpusets_mem_gen = task_cs(current)->mems_generation;
+		my_cpusets_mem_gen = task_cs(tsk)->mems_generation;
 		rcu_read_unlock();
 	}
 
@@ -1778,7 +1778,7 @@ static void move_member_tasks_to_cpuset(struct cpuset *from, struct cpuset *to)
 	scan.scan.heap = NULL;
 	scan.to = to->css.cgroup;
 
-	if (cgroup_scan_tasks((struct cgroup_scanner *)&scan))
+	if (cgroup_scan_tasks(&scan.scan))
 		printk(KERN_ERR "move_member_tasks_to_cpuset: "
 				"cgroup_scan_tasks failed\n");
 }