#include<linux/ioctl.h>

struct pstackdevrec {
	int size;
	char data[0];
};


struct pstackinfo {
	int recsize;
	int maxelements;
};


/*
 * Ioctl definitions
 */

/* Use '>' as magic number */
#define PSTACKDEV_IOC_MAGIC  '>'

#define PSTACKDEV_IOCFREE    _IO(PSTACKDEV_IOC_MAGIC, 0)
#define PSTACKDEV_IOCINIT    _IOW(PSTACKDEV_IOC_MAGIC, 1,struct pstackinfo *)