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Commit 67bd2c59 authored by Li Zefan's avatar Li Zefan Committed by Tejun Heo
Browse files

cpuset: remove unnecessary variable in cpuset_attach() 



We can just use oldcs->mems_allowed.

Signed-off-by: default avatarLi Zefan <lizefan@huawei.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 40df2deb

kernel/cpuset.c

+2 −4
Original line number Diff line number Diff line
@@ -1407,8 +1407,7 @@ static cpumask_var_t cpus_attach; 


static void cpuset_attach(struct cgroup *cgrp, struct cgroup_taskset *tset)

{

	/* static bufs protected by cpuset_mutex */

	static nodemask_t cpuset_attach_nodemask_from;

	/* static buf protected by cpuset_mutex */

	static nodemask_t cpuset_attach_nodemask_to;

	struct mm_struct *mm;

	struct task_struct *task;
@@ -1442,13 +1441,12 @@ static void cpuset_attach(struct cgroup *cgrp, struct cgroup_taskset *tset) 
	 * Change mm, possibly for multiple threads in a threadgroup. This is

	 * expensive and may sleep.

	 */

	cpuset_attach_nodemask_from = oldcs->mems_allowed;

	cpuset_attach_nodemask_to = cs->mems_allowed;

	mm = get_task_mm(leader);

	if (mm) {

		mpol_rebind_mm(mm, &cpuset_attach_nodemask_to);

		if (is_memory_migrate(cs))

			cpuset_migrate_mm(mm, &cpuset_attach_nodemask_from,

			cpuset_migrate_mm(mm, &oldcs->mems_allowed,

					  &cpuset_attach_nodemask_to);

		mmput(mm);

	}