Quoting Gao feng (gaofeng@xxxxxxxxxxxxxx):
> since commit 1cdcbec1a3372c0c49c59d292e708fd07b509f18,
> is_container_init has no used for a long time.
>
> just remove it.
Only thing is it's being exported, so I think it needs to go through
deprecation.
> Signed-off-by: Gao feng <gaofeng@xxxxxxxxxxxxxx>
> ---
> include/linux/sched.h | 6 ------
> kernel/pid.c | 15 ---------------
> 2 files changed, 0 insertions(+), 21 deletions(-)
>
> diff --git a/include/linux/sched.h b/include/linux/sched.h
> index 0dd42a0..3fadd26 100644
> --- a/include/linux/sched.h
> +++ b/include/linux/sched.h
> @@ -1710,12 +1710,6 @@ static inline int is_global_init(struct task_struct *tsk)
> return tsk->pid == 1;
> }
>
> -/*
> - * is_container_init:
> - * check whether in the task is init in its own pid namespace.
> - */
> -extern int is_container_init(struct task_struct *tsk);
> -
> extern struct pid *cad_pid;
>
> extern void free_task(struct task_struct *tsk);
> diff --git a/kernel/pid.c b/kernel/pid.c
> index aebd4f5..8ccdf0e 100644
> --- a/kernel/pid.c
> +++ b/kernel/pid.c
> @@ -81,21 +81,6 @@ struct pid_namespace init_pid_ns = {
> };
> EXPORT_SYMBOL_GPL(init_pid_ns);
>
> -int is_container_init(struct task_struct *tsk)
> -{
> - int ret = 0;
> - struct pid *pid;
> -
> - rcu_read_lock();
> - pid = task_pid(tsk);
> - if (pid != NULL && pid->numbers[pid->level].nr == 1)
> - ret = 1;
> - rcu_read_unlock();
> -
> - return ret;
> -}
> -EXPORT_SYMBOL(is_container_init);
> -
> /*
> * Note: disable interrupts while the pidmap_lock is held as an
> * interrupt might come in and do read_lock(&tasklist_lock).
> --
> 1.7.7.6
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