#if HZ <= 1000000 && !(1000000 % HZ) return (u + (1000000 / HZ) - 1) / (1000000 / HZ); #elif HZ > 1000000 && !(HZ % 1000000) return u * (HZ / 1000000); 
#if HZ <= USEC_PER_SEC && !(USEC_PER_SEC % HZ) return (u + (USEC_PER_SEC / HZ) - 1) / (USEC_PER_SEC / HZ); #elif HZ > USEC_PER_SEC && !(HZ % USEC_PER_SEC) return u * (HZ / USEC_PER_SEC); 
static inline unsigned long usecs_to_jiffies(const unsigned int u){	if (u > jiffies_to_usecs(MAX_JIFFY_OFFSET))		return MAX_JIFFY_OFFSET;#if HZ <= 1000000 && !(1000000 % HZ)	return (u + (1000000 / HZ) - 1) / (1000000 / HZ);#elif HZ > 1000000 && !(HZ % 1000000)	return u * (HZ / 1000000);#else	return (u * HZ + 999999) / 1000000;#endif}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/84f902c0903a98a315b45a4fba3d2ac0de388256/jiffies.h/clean/include/linux/jiffies.h