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Merge up to 2.6.20-rc4
Merge of 2.6.x-xfs-melb:linux:27915c by kenmcd.

/* taskstats_kern.h - kernel header for per-task statistics interface
 *
 * Copyright (C) Shailabh Nagar, IBM Corp. 2006
 *           (C) Balbir Singh,   IBM Corp. 2006
 */

#ifndef _LINUX_TASKSTATS_KERN_H
#define _LINUX_TASKSTATS_KERN_H

#include <linux/taskstats.h>
#include <linux/sched.h>
#include <net/genetlink.h>

#ifdef CONFIG_TASKSTATS
extern struct kmem_cache *taskstats_cache;
extern struct mutex taskstats_exit_mutex;

static inline void taskstats_tgid_init(struct signal_struct *sig)
{
	sig->stats = NULL;
}

static inline void taskstats_tgid_free(struct signal_struct *sig)
{
	if (sig->stats)
		kmem_cache_free(taskstats_cache, sig->stats);
}

extern void taskstats_exit(struct task_struct *, int group_dead);
extern void taskstats_init_early(void);
#else
static inline void taskstats_exit(struct task_struct *tsk, int group_dead)
{}
static inline void taskstats_tgid_init(struct signal_struct *sig)
{}
static inline void taskstats_tgid_free(struct signal_struct *sig)
{}
static inline void taskstats_init_early(void)
{}
#endif /* CONFIG_TASKSTATS */

#endif