root/include/linux/kthread.h

INCLUDED FROM

#ifndef _LINUX_KTHREAD_H
#define _LINUX_KTHREAD_H
/* Simple interface for creating and stopping kernel threads without mess. */
#include <linux/err.h>
#include <linux/sched.h>

struct task_struct *kthread_create(int (*threadfn)(void *data),
                                   void *data,
                                   const char namefmt[], ...)
        __attribute__((format(printf, 3, 4)));

/**
 * kthread_run - create and wake a thread.
 * @threadfn: the function to run until signal_pending(current).
 * @data: data ptr for @threadfn.
 * @namefmt: printf-style name for the thread.
 *
 * Description: Convenient wrapper for kthread_create() followed by
 * wake_up_process().  Returns the kthread or ERR_PTR(-ENOMEM).
 */
#define kthread_run(threadfn, data, namefmt, ...)                          \
({                                                                         \
        struct task_struct *__k                                            \
                = kthread_create(threadfn, data, namefmt, ## __VA_ARGS__); \
        if (!IS_ERR(__k))                                                  \
                wake_up_process(__k);                                      \
        __k;                                                               \
})

void kthread_bind(struct task_struct *k, unsigned int cpu);
int kthread_stop(struct task_struct *k);
int kthread_should_stop(void);

int kthreadd(void *unused);
extern struct task_struct *kthreadd_task;

#endif /* _LINUX_KTHREAD_H */