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   1 #ifndef _LINUX_KTHREAD_H
   2 #define _LINUX_KTHREAD_H
   3 /* Simple interface for creating and stopping kernel threads without mess. */
   4 #include <linux/err.h>
   5 #include <linux/sched.h>
   6
   7 struct task_struct *kthread_create(int (*threadfn)(void *data),
   8                                    void *data,
   9                                    const char namefmt[], ...);
  10
  11 /**
  12  * kthread_run - create and wake a thread.
  13  * @threadfn: the function to run until signal_pending(current).
  14  * @data: data ptr for @threadfn.
  15  * @namefmt: printf-style name for the thread.
  16  *
  17  * Description: Convenient wrapper for kthread_create() followed by
  18  * wake_up_process().  Returns the kthread or ERR_PTR(-ENOMEM).
  19  */
  20 #define kthread_run(threadfn, data, namefmt, ...)                          \
  21 ({                                                                         \
  22         struct task_struct *__k                                            \
  23                 = kthread_create(threadfn, data, namefmt, ## __VA_ARGS__); \
  24         if (!IS_ERR(__k))                                                  \
  25                 wake_up_process(__k);                                      \
  26         __k;                                                               \
  27 })
  28
  29 void kthread_bind(struct task_struct *k, unsigned int cpu);
  30 int kthread_stop(struct task_struct *k);
  31 int kthread_should_stop(void);
  32
  33 int kthreadd(void *unused);
  34 extern struct task_struct *kthreadd_task;
  35
  36 #endif /* _LINUX_KTHREAD_H */