kill daemonize()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

7 files changed, 1 insertions, 128 deletions

diff --git a/drivers/staging/gdm72xx/gdm_usb.c b/drivers/staging/gdm72xx/gdm_usb.c
index 0c9e8958009b..39db582ab1a6 100644
--- a/drivers/staging/gdm72xx/gdm_usb.c
+++ b/drivers/staging/gdm72xx/gdm_usb.c
@@ -701,8 +701,6 @@ static int k_mode_thread(void *arg)
         unsigned long flags, flags2, expire;
         int ret;
 
-        daemonize("k_mode_wimax");
-
         while (!k_mode_stop) {
 
                 spin_lock_irqsave(&k_lock, flags2);
@@ -764,7 +762,7 @@ static struct usb_driver gdm_usb_driver = {
 static int __init usb_gdm_wimax_init(void)
 {
 #ifdef CONFIG_WIMAX_GDM72XX_K_MODE
-        kthread_run(k_mode_thread, NULL, "WiMax_thread");
+        kthread_run(k_mode_thread, NULL, "k_mode_wimax");
 #endif /* CONFIG_WIMAX_GDM72XX_K_MODE */
         return usb_register(&gdm_usb_driver);
 }
diff --git a/fs/file.c b/fs/file.c
index 7cb71b992603..7272a1c5831d 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -519,12 +519,6 @@ struct files_struct init_files = {
         .file_lock      = __SPIN_LOCK_UNLOCKED(init_task.file_lock),
 };
 
-void daemonize_descriptors(void)
-{
-        atomic_inc(&init_files.count);
-        reset_files_struct(&init_files);
-}
-
 /*
  * allocate a file descriptor, mark it busy.
  */
diff --git a/fs/fs_struct.c b/fs/fs_struct.c
index 5df4775fea03..fe6ca583bbc0 100644
--- a/fs/fs_struct.c
+++ b/fs/fs_struct.c
@@ -164,27 +164,3 @@ struct fs_struct init_fs = {
         .seq            = SEQCNT_ZERO,
         .umask          = 0022,
 };
-
-void daemonize_fs_struct(void)
-{
-        struct fs_struct *fs = current->fs;
-
-        if (fs) {
-                int kill;
-
-                task_lock(current);
-
-                spin_lock(&init_fs.lock);
-                init_fs.users++;
-                spin_unlock(&init_fs.lock);
-
-                spin_lock(&fs->lock);
-                current->fs = &init_fs;
-                kill = !--fs->users;
-                spin_unlock(&fs->lock);
-
-                task_unlock(current);
-                if (kill)
-                        free_fs_struct(fs);
-        }
-}
diff --git a/include/linux/fdtable.h b/include/linux/fdtable.h
index 45052aa814c8..fb7dacae0522 100644
--- a/include/linux/fdtable.h
+++ b/include/linux/fdtable.h
@@ -95,7 +95,6 @@ struct task_struct;
 struct files_struct *get_files_struct(struct task_struct *);
 void put_files_struct(struct files_struct *fs);
 void reset_files_struct(struct files_struct *);
-void daemonize_descriptors(void);
 int unshare_files(struct files_struct **);
 struct files_struct *dup_fd(struct files_struct *, int *);
 void do_close_on_exec(struct files_struct *);
diff --git a/include/linux/fs_struct.h b/include/linux/fs_struct.h
index 003dc0fd7347..d0ae3a84bcfb 100644
--- a/include/linux/fs_struct.h
+++ b/include/linux/fs_struct.h
@@ -21,7 +21,6 @@ extern void set_fs_root(struct fs_struct *, struct path *);
 extern void set_fs_pwd(struct fs_struct *, struct path *);
 extern struct fs_struct *copy_fs_struct(struct fs_struct *);
 extern void free_fs_struct(struct fs_struct *);
-extern void daemonize_fs_struct(void);
 extern int unshare_fs_struct(void);
 
 static inline void get_fs_root(struct fs_struct *fs, struct path *root)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 0dd42a02df2e..a0166481eb20 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2283,7 +2283,6 @@ extern void flush_itimer_signals(void);
 
 extern void do_group_exit(int);
 
-extern void daemonize(const char *, ...);
 extern int allow_signal(int);
 extern int disallow_signal(int);
 
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.