From 49d769d52e16efabd3ad47b7995522fff771371d Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Wed, 9 May 2007 02:34:33 -0700 Subject: [PATCH] Change reparent_to_init to reparent_to_kthreadd When a kernel thread calls daemonize, instead of reparenting the thread to init reparent the thread to kthreadd next to the threads created by kthread_create. This is really just a stop gap until daemonize goes away, but it does ensure no kernel threads are under init and they are all in one place that is easy to find. Signed-off-by: Eric W. Biederman Cc: Oleg Nesterov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/exit.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/kernel/exit.c b/kernel/exit.c index f5a7abb621f..bc982cd7274 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -26,6 +26,7 @@ #include #include #include +#include #include #include #include @@ -254,26 +255,25 @@ static int has_stopped_jobs(struct pid *pgrp) } /** - * reparent_to_init - Reparent the calling kernel thread to the init task of the pid space that the thread belongs to. + * 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 init so that - * it is correctly cleaned up on exit. + * 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_init() gives the caller full capabilities. + * NOTE that reparent_to_kthreadd() gives the caller full capabilities. */ -static void reparent_to_init(void) +static void reparent_to_kthreadd(void) { write_lock_irq(&tasklist_lock); ptrace_unlink(current); /* Reparent to init */ remove_parent(current); - current->parent = child_reaper(current); - current->real_parent = child_reaper(current); + current->real_parent = current->parent = kthreadd_task; add_parent(current); /* Set the exit signal to SIGCHLD so we signal init on exit */ @@ -400,7 +400,7 @@ void daemonize(const char *name, ...) current->files = init_task.files; atomic_inc(¤t->files->count); - reparent_to_init(); + reparent_to_kthreadd(); } EXPORT_SYMBOL(daemonize); -- 2.20.1