diff options
Diffstat (limited to 'kernel/exit.c')
| -rw-r--r-- | kernel/exit.c | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/kernel/exit.c b/kernel/exit.c index 618f7ee56003..50d2e93c36ea 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -322,43 +322,6 @@ kill_orphaned_pgrp(struct task_struct *tsk, struct task_struct *parent) } } -/** - * reparent_to_kthreadd - Reparent the calling kernel thread to kthreadd - * - * If a kernel thread is launched as a result of a system call, or if - * it ever exits, it should generally reparent itself to kthreadd so it - * isn't in the way of other processes and is correctly cleaned up on exit. - * - * The various task state such as scheduling policy and priority may have - * been inherited from a user process, so we reset them to sane values here. - * - * NOTE that reparent_to_kthreadd() gives the caller full capabilities. - */ -static void reparent_to_kthreadd(void) -{ - write_lock_irq(&tasklist_lock); - - ptrace_unlink(current); - /* Reparent to init */ - current->real_parent = current->parent = kthreadd_task; - list_move_tail(¤t->sibling, ¤t->real_parent->children); - - /* Set the exit signal to SIGCHLD so we signal init on exit */ - current->exit_signal = SIGCHLD; - - if (task_nice(current) < 0) - set_user_nice(current, 0); - /* cpus_allowed? */ - /* rt_priority? */ - /* signals? */ - memcpy(current->signal->rlim, init_task.signal->rlim, - sizeof(current->signal->rlim)); - - atomic_inc(&init_cred.usage); - commit_creds(&init_cred); - write_unlock_irq(&tasklist_lock); -} - void __set_special_pids(struct pid *pid) { struct task_struct *curr = current->group_leader; @@ -370,13 +333,6 @@ void __set_special_pids(struct pid *pid) change_pid(curr, PIDTYPE_PGID, pid); } -static void set_special_pids(struct pid *pid) -{ - write_lock_irq(&tasklist_lock); - __set_special_pids(pid); - write_unlock_irq(&tasklist_lock); -} - /* * Let kernel threads use this to say that they allow a certain signal. * Must not be used if kthread was cloned with CLONE_SIGHAND. @@ -416,54 +372,6 @@ int disallow_signal(int sig) EXPORT_SYMBOL(disallow_signal); -/* - * Put all the gunge required to become a kernel thread without - * attached user resources in one place where it belongs. - */ - -void daemonize(const char *name, ...) -{ - va_list args; - sigset_t blocked; - - va_start(args, name); - vsnprintf(current->comm, sizeof(current->comm), name, args); - va_end(args); - - /* - * If we were started as result of loading a module, close all of the - * user space pages. We don't need them, and if we didn't close them - * they would be locked into memory. - */ - exit_mm(current); - /* - * We don't want to get frozen, in case system-wide hibernation - * or suspend transition begins right now. - */ - current->flags |= (PF_NOFREEZE | PF_KTHREAD); - - if (current->nsproxy != &init_nsproxy) { - get_nsproxy(&init_nsproxy); - switch_task_namespaces(current, &init_nsproxy); - } - set_special_pids(&init_struct_pid); - proc_clear_tty(current); - - /* Block and flush all signals */ - sigfillset(&blocked); - sigprocmask(SIG_BLOCK, &blocked, NULL); - flush_signals(current); - - /* Become as one with the init task */ - - daemonize_fs_struct(); - daemonize_descriptors(); - - reparent_to_kthreadd(); -} - -EXPORT_SYMBOL(daemonize); - #ifdef CONFIG_MM_OWNER /* * A task is exiting. If it owned this mm, find a new owner for the mm. |