Change reparent_to_init to reparent_to_kthreadd

[Linux Kernel Mailing List]

Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=49d769d52e16efabd3ad47b7995522fff771371d
Commit:     49d769d52e16efabd3ad47b7995522fff771371d
Parent:     73c279927f89561ecb45b2dfdf9314bafcfd9f67
Author:     Eric W. Biederman <[EMAIL PROTECTED]>
AuthorDate: Wed May 9 02:34:33 2007 -0700
Committer:  Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Wed May 9 12:30:53 2007 -0700

    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 <[EMAIL PROTECTED]>
    Cc: Oleg Nesterov <[EMAIL PROTECTED]>
    Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
    Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
 kernel/exit.c |   16 ++++++++--------
 1 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/kernel/exit.c b/kernel/exit.c
index f5a7abb..bc982cd 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -26,6 +26,7 @@
 #include <linux/profile.h>
 #include <linux/mount.h>
 #include <linux/proc_fs.h>
+#include <linux/kthread.h>
 #include <linux/mempolicy.h>
 #include <linux/taskstats_kern.h>
 #include <linux/delayacct.h>
@@ -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(&current->files->count);
 
-       reparent_to_init();
+       reparent_to_kthreadd();
 }
 
 EXPORT_SYMBOL(daemonize);
-
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