long tusers = users;
if (users == 0) return;
flush_atc_entry(long users, vaddr_t va, boolean_t kernel){	int cpu;	long tusers = users;#ifdef DEBUG	if ((tusers != 0) && (ff1(tusers) >= MAX_CPUS)) {		panic("flush_atc_entry: invalid ff1 users = %d", ff1(tusers));	}#endif	while ((cpu = ff1(tusers)) != 32) {		if (cpu_sets[cpu]) { /* just checking to make sure */			cmmu_flush_tlb(cpu, kernel, va, PAGE_SIZE);		}		tusers &= ~(1 << cpu);	}}