param.h
#ifndef _UM_PARAM_H
#define _UM_PARAM_H
#define EXEC_PAGESIZE 4096
#ifndef NOGROUP
#define NOGROUP (-1)
#endif
#define MAXHOSTNAMELEN 64 /* max length of hostname */
#ifdef __KERNEL__
#define HZ CONFIG_HZ
#define USER_HZ 100 /* .. some user interfaces are in "ticks" */
#define CLOCKS_PER_SEC (USER_HZ) /* frequency at which times() counts */
#else
#define HZ 100
#endif
#endif