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linux-2.6
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kill daemonize() 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-10-02 16:34:38 -04:00
parent 02232f8d2b
commit c4144670fd
7 changed files with 1 additions and 128 deletions
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4
drivers/staging/gdm72xx/gdm_usb.c
View File

@ -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);
}

6
fs/file.c
View File

@ -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.
*/

24
fs/fs_struct.c
View File

@ -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);
}
}

1
include/linux/fdtable.h
View File

@ -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 *);

1
include/linux/fs_struct.h
View File

@ -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)

1
include/linux/sched.h
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@ -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);

92
kernel/exit.c
View File

@ -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.