#ifndef __TRACE_STAT_H#define __TRACE_STAT_H #include <linux/seq_file.h> /* * If you want to provide a stat file (one-shot statistics), fill * an iterator with stat_start/stat_next and a stat_show callbacks. * The others callbacks are optional. */struct tracer_stat {	/* The name of your stat file */	const char		*name;	/* Iteration over statistic entries */	void			*(*stat_start)(struct tracer_stat *trace);	void			*(*stat_next)(void *prev, int idx);	/* Compare two entries for stats sorting */	int			(*stat_cmp)(void *p1, void *p2);	/* Print a stat entry */	int			(*stat_show)(struct seq_file *s, void *p);	/* Release an entry */	void			(*stat_release)(void *stat);	/* Print the headers of your stat entries */	int			(*stat_headers)(struct seq_file *s);}; /* * Destroy or create a stat file */extern int register_stat_tracer(struct tracer_stat *trace);extern void unregister_stat_tracer(struct tracer_stat *trace); #endif /* __TRACE_STAT_H */