linux-kernel - [PATCH 01/14] cgroup: remove an unused parameter from cgroup_task

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Message-Id: <1444447781-16182-2-git-send-email-tj@kernel.org>
Date:	Fri,  9 Oct 2015 23:29:28 -0400
From:	Tejun Heo <tj@...nel.org>
To:	lizefan@...wei.com, hannes@...xchg.org
Cc:	cgroups@...r.kernel.org, cyphar@...har.com,
	linux-kernel@...r.kernel.org, kernel-team@...com,
	Tejun Heo <tj@...nel.org>
Subject: [PATCH 01/14] cgroup: remove an unused parameter from cgroup_task_migrate()

cgroup_task_migrate() no longer uses @old_cgrp.  Remove it.

Signed-off-by: Tejun Heo <tj@...nel.org>
---
 kernel/cgroup.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index ae23814..49f30f1 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -2235,14 +2235,12 @@ struct task_struct *cgroup_taskset_next(struct cgroup_taskset *tset)
 
 /**
  * cgroup_task_migrate - move a task from one cgroup to another.
- * @old_cgrp: the cgroup @tsk is being migrated from
  * @tsk: the task being migrated
  * @new_cset: the new css_set @tsk is being attached to
  *
  * Must be called with cgroup_mutex, threadgroup and css_set_rwsem locked.
  */
-static void cgroup_task_migrate(struct cgroup *old_cgrp,
-				struct task_struct *tsk,
+static void cgroup_task_migrate(struct task_struct *tsk,
 				struct css_set *new_cset)
 {
 	struct css_set *old_cset;
@@ -2311,8 +2309,7 @@ static int cgroup_taskset_migrate(struct cgroup_taskset *tset,
 	down_write(&css_set_rwsem);
 	list_for_each_entry(cset, &tset->src_csets, mg_node) {
 		list_for_each_entry_safe(task, tmp_task, &cset->mg_tasks, cg_list)
-			cgroup_task_migrate(cset->mg_src_cgrp, task,
-					    cset->mg_dst_cset);
+			cgroup_task_migrate(task, cset->mg_dst_cset);
 	}
 	up_write(&css_set_rwsem);
 
-- 
2.4.3

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