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Subject[PATCH 4/4] cpuset: remove struct cpuset_hotplug_scanner
Use cgroup_scanner.data, instead of introducing cpuset_hotplug_scanner.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
---
kernel/cpuset.c | 23 +++++++++--------------
1 files changed, 9 insertions(+), 14 deletions(-)

diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 3202364..a46d693 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -128,10 +128,6 @@ static inline struct cpuset *task_cs(struct task_struct *task)
return container_of(task_subsys_state(task, cpuset_subsys_id),
struct cpuset, css);
}
-struct cpuset_hotplug_scanner {
- struct cgroup_scanner scan;
- struct cgroup *to;
-};

/* bits in struct cpuset flags field */
typedef enum {
@@ -1889,10 +1885,9 @@ int __init cpuset_init(void)
static void cpuset_do_move_task(struct task_struct *tsk,
struct cgroup_scanner *scan)
{
- struct cpuset_hotplug_scanner *chsp;
+ struct cgroup *new_cgroup = scan->data;

- chsp = container_of(scan, struct cpuset_hotplug_scanner, scan);
- cgroup_attach_task(chsp->to, tsk);
+ cgroup_attach_task(new_cgroup, tsk);
}

/**
@@ -1908,15 +1903,15 @@ static void cpuset_do_move_task(struct task_struct *tsk,
*/
static void move_member_tasks_to_cpuset(struct cpuset *from, struct cpuset *to)
{
- struct cpuset_hotplug_scanner scan;
+ struct cgroup_scanner scan;

- scan.scan.cg = from->css.cgroup;
- scan.scan.test_task = NULL; /* select all tasks in cgroup */
- scan.scan.process_task = cpuset_do_move_task;
- scan.scan.heap = NULL;
- scan.to = to->css.cgroup;
+ scan.cg = from->css.cgroup;
+ scan.test_task = NULL; /* select all tasks in cgroup */
+ scan.process_task = cpuset_do_move_task;
+ scan.heap = NULL;
+ scan.data = to->css.cgroup;

- if (cgroup_scan_tasks(&scan.scan))
+ if (cgroup_scan_tasks(&scan))
printk(KERN_ERR "move_member_tasks_to_cpuset: "
"cgroup_scan_tasks failed\n");
}
-- 1.5.4.rc3

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