cpuset_down(&cpuset_sem); 
down(&cpuset_sem); 
static int cpuset_sprintf_cpulist(char *page, struct cpuset *cs){	cpumask_t mask;	cpuset_down(&cpuset_sem);	mask = cs->cpus_allowed;	cpuset_up(&cpuset_sem);	return cpulist_scnprintf(page, PAGE_SIZE, mask);}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/5aa15b5f27fc2c404530c6c8eabdb8437deb3163/cpuset.c/buggy/kernel/cpuset.c