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authorAl Viro <viro@zeniv.linux.org.uk>2012-10-02 16:34:38 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2012-11-28 21:49:02 -0500
commitc4144670fd9b34d6eae22c9f83751745898e8243 (patch)
treeda0bbda5707fafdc1d79eb2c851835c777182e89 /kernel
parent02232f8d2b22708f0651dc515544f4a7ef1e0224 (diff)
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kill daemonize()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/exit.c92
1 files changed, 0 insertions, 92 deletions
diff --git a/kernel/exit.c b/kernel/exit.c
index 346616c0092c..f9275e2c7c2c 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(&current->sibling, &current->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.