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pid namespaces: miscellaneous preparations for pid namespaces

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* remove pid.h from pid_namespaces.h;
* rework is_(cgroup|global)_init;
* optimize (get|put)_pid_ns for init_pid_ns;
* declare task_child_reaper to return actual reaper.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Sukadev Bhattiprolu <sukadev@us.ibm.com>
Cc: Paul Menage <menage@google.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Pavel Emelyanov 2007-10-18 23:40:09 -07:00 • committed by Linus Torvalds
parent 07543f5c75
commit b461cc0382
3 changed files with 25 additions and 18 deletions
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12
include/linux/sched.h
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@ -1329,19 +1329,17 @@ static inline int pid_alive(struct task_struct *p)
* @tsk: Task structure to be checked.
*
* Check if a task structure is the first user space task the kernel created.
*
* TODO: We should inline this function after some cleanups in pid_namespace.h
*/
extern int is_global_init(struct task_struct *tsk);
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.
*/
static inline int is_container_init(struct task_struct *tsk)
{
return tsk->pid == 1;
}
extern int is_container_init(struct task_struct *tsk);
extern struct pid *cad_pid;