include/linux/kthread.h

   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         __attribute__((format(printf, 3, 4)));
  11
  12 /**
  13  * kthread_run - create and wake a thread.
  14  * @threadfn: the function to run until signal_pending(current).
  15  * @data: data ptr for @threadfn.
  16  * @namefmt: printf-style name for the thread.
  17  *
  18  * Description: Convenient wrapper for kthread_create() followed by
  19  * wake_up_process().  Returns the kthread or ERR_PTR(-ENOMEM).
  20  */
  21 #define kthread_run(threadfn, data, namefmt, ...)                          \
  22 ({                                                                         \
  23         struct task_struct *__k                                            \
  24                 = kthread_create(threadfn, data, namefmt, ## __VA_ARGS__); \
  25         if (!IS_ERR(__k))                                                  \
  26                 wake_up_process(__k);                                      \
  27         __k;                                                               \
  28 })
  29
  30 void kthread_bind(struct task_struct *k, unsigned int cpu);
  31 int kthread_stop(struct task_struct *k);
  32 int kthread_should_stop(void);
  33
  34 int kthreadd(void *unused);
  35 extern struct task_struct *kthreadd_task;
  36
  37 #endif /* _LINUX_KTHREAD_H */