diff options
| author | Chuyi Zhou <zhouchuyi@bytedance.com> | 2025-09-04 15:45:05 +0800 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2025-09-04 07:25:20 -1000 |
| commit | d8b269e009bbc471cb2735b5f737839495efce3b (patch) | |
| tree | 948dd60ea3b54b4ce0cbc86aa0002066dbb272ee | |
| parent | 3514309e03222c0ad06cd3fda0f0d2c98e786bf8 (diff) | |
cgroup: Remove unused cgroup_subsys::post_attach
cgroup_subsys::post_attach callback was introduced in commit 5cf1cacb49ae
("cgroup, cpuset: replace cpuset_post_attach_flush() with
cgroup_subsys->post_attach callback") and only cpuset would use this
callback to wait for the mm migration to complete at the end of
__cgroup_procs_write(). Since the previous patch defer the flush operation
until returning to userspace, no one use this callback now. Remove this
callback from cgroup_subsys.
Signed-off-by: Chuyi Zhou <zhouchuyi@bytedance.com>
Acked-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
| -rw-r--r-- | include/linux/cgroup-defs.h | 1 | ||||
| -rw-r--r-- | kernel/cgroup/cgroup.c | 4 |
2 files changed, 0 insertions, 5 deletions
diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h index 539c64eeef38..92ed6d18266d 100644 --- a/include/linux/cgroup-defs.h +++ b/include/linux/cgroup-defs.h @@ -763,7 +763,6 @@ struct cgroup_subsys { int (*can_attach)(struct cgroup_taskset *tset); void (*cancel_attach)(struct cgroup_taskset *tset); void (*attach)(struct cgroup_taskset *tset); - void (*post_attach)(void); int (*can_fork)(struct task_struct *task, struct css_set *cset); void (*cancel_fork)(struct task_struct *task, struct css_set *cset); diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index b38d7a847ed4..0dc6ad71f175 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -3033,10 +3033,6 @@ void cgroup_procs_write_finish(struct task_struct *task, bool threadgroup_locked put_task_struct(task); cgroup_attach_unlock(threadgroup_locked); - - for_each_subsys(ss, ssid) - if (ss->post_attach) - ss->post_attach(); } static void cgroup_print_ss_mask(struct seq_file *seq, u16 ss_mask) |