[linux-block.git] / include / linux / kthread.h

#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 */
Commit	Line	Data
1da177e4 LT	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
1da177e4 LT	7	struct task_struct kthread_create(int (threadfn)(void *data),
1da177e4 LT	8	void *data,
ed9559d3 RR	9	const char namefmt[], ...)
ed9559d3 RR	10	__attribute__((format(printf, 3, 4)));
1da177e4 LT	11
1da177e4 LT	12	/**
9e37bd30	13	* kthread_run - create and wake a thread.
1da177e4 LT	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
9e37bd30 RD	19	* wake_up_process(). Returns the kthread or ERR_PTR(-ENOMEM).
9e37bd30 RD	20	*/
1da177e4 LT	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
1da177e4	30	void kthread_bind(struct task_struct *k, unsigned int cpu);
1da177e4	31	int kthread_stop(struct task_struct *k);
1da177e4 LT	32	int kthread_should_stop(void);
1da177e4 LT	33
73c27992 EB	34	int kthreadd(void *unused);
	35	extern struct task_struct *kthreadd_task;
	36
1da177e4	37	#endif /* _LINUX_KTHREAD_H */