diff options
Diffstat (limited to 'kernel/pid.c')
| -rw-r--r-- | kernel/pid.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/kernel/pid.c b/kernel/pid.c index 93e212f20671..8387e8c68193 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -223,9 +223,6 @@ int fastcall attach_pid(struct task_struct *task, enum pid_type type, int nr) struct pid_link *link; struct pid *pid; - WARN_ON(!task->pid); /* to be removed soon */ - WARN_ON(!nr); /* to be removed soon */ - link = &task->pids[type]; link->pid = pid = find_pid(nr); hlist_add_head_rcu(&link->node, &pid->tasks[type]); @@ -252,6 +249,15 @@ void fastcall detach_pid(struct task_struct *task, enum pid_type type) free_pid(pid); } +/* transfer_pid is an optimization of attach_pid(new), detach_pid(old) */ +void fastcall transfer_pid(struct task_struct *old, struct task_struct *new, + enum pid_type type) +{ + new->pids[type].pid = old->pids[type].pid; + hlist_replace_rcu(&old->pids[type].node, &new->pids[type].node); + old->pids[type].pid = NULL; +} + struct task_struct * fastcall pid_task(struct pid *pid, enum pid_type type) { struct task_struct *result = NULL; |