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| author | Miaohe Lin <linmiaohe@huawei.com> | 2023-06-10 11:57:37 +0800 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2023-06-12 07:05:56 -1000 |
| commit | d16b3af46679a1eb21652c37711a60d3d4e6b8c0 (patch) | |
| tree | a02eae61c04b3261b7726df1b622618203e91995 | |
| parent | 5273ee254e34cf577460dc8eb786b26a7b5329d8 (diff) | |
| download | linux-stable-d16b3af46679a1eb21652c37711a60d3d4e6b8c0.tar.gz linux-stable-d16b3af46679a1eb21652c37711a60d3d4e6b8c0.tar.bz2 linux-stable-d16b3af46679a1eb21652c37711a60d3d4e6b8c0.zip | |
cgroup: remove unused task_cgroup_path()
task_cgroup_path() is not used anymore. So remove it.
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
| -rw-r--r-- | include/linux/cgroup.h | 1 | ||||
| -rw-r--r-- | kernel/cgroup/cgroup.c | 39 |
2 files changed, 0 insertions, 40 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index 885f5395fcd0..1261a47932a6 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -118,7 +118,6 @@ int cgroup_rm_cftypes(struct cftype *cfts); void cgroup_file_notify(struct cgroup_file *cfile); void cgroup_file_show(struct cgroup_file *cfile, bool show); -int task_cgroup_path(struct task_struct *task, char *buf, size_t buflen); int cgroupstats_build(struct cgroupstats *stats, struct dentry *dentry); int proc_cgroup_show(struct seq_file *m, struct pid_namespace *ns, struct pid *pid, struct task_struct *tsk); diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index 57f31b234433..04d1c0cde882 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -2365,45 +2365,6 @@ int cgroup_path_ns(struct cgroup *cgrp, char *buf, size_t buflen, EXPORT_SYMBOL_GPL(cgroup_path_ns); /** - * task_cgroup_path - cgroup path of a task in the first cgroup hierarchy - * @task: target task - * @buf: the buffer to write the path into - * @buflen: the length of the buffer - * - * Determine @task's cgroup on the first (the one with the lowest non-zero - * hierarchy_id) cgroup hierarchy and copy its path into @buf. This - * function grabs cgroup_mutex and shouldn't be used inside locks used by - * cgroup controller callbacks. - * - * Return value is the same as kernfs_path(). - */ -int task_cgroup_path(struct task_struct *task, char *buf, size_t buflen) -{ - struct cgroup_root *root; - struct cgroup *cgrp; - int hierarchy_id = 1; - int ret; - - cgroup_lock(); - spin_lock_irq(&css_set_lock); - - root = idr_get_next(&cgroup_hierarchy_idr, &hierarchy_id); - - if (root) { - cgrp = task_cgroup_from_root(task, root); - ret = cgroup_path_ns_locked(cgrp, buf, buflen, &init_cgroup_ns); - } else { - /* if no hierarchy exists, everyone is in "/" */ - ret = strscpy(buf, "/", buflen); - } - - spin_unlock_irq(&css_set_lock); - cgroup_unlock(); - return ret; -} -EXPORT_SYMBOL_GPL(task_cgroup_path); - -/** * cgroup_attach_lock - Lock for ->attach() * @lock_threadgroup: whether to down_write cgroup_threadgroup_rwsem * |