int pid, status, n; 
int pid, status, n, flags; 
void start_userspace(int cpu){	void *stack;	unsigned long sp;	int pid, status, n;	stack = mmap(NULL, PAGE_SIZE, PROT_READ | PROT_WRITE | PROT_EXEC,		     MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);	if(stack == MAP_FAILED)		panic("start_userspace : mmap failed, errno = %d", errno);	sp = (unsigned long) stack + PAGE_SIZE - sizeof(void *);	pid = clone(userspace_tramp, (void *) sp, 		    CLONE_FILES | CLONE_VM | SIGCHLD, NULL);	if(pid < 0)		panic("start_userspace : clone failed, errno = %d", errno);	do {		CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED));		if(n < 0)			panic("start_userspace : wait failed, errno = %d", 			      errno);	} while(WIFSTOPPED(status) && (WSTOPSIG(status) == SIGVTALRM));	if(!WIFSTOPPED(status) || (WSTOPSIG(status) != SIGSTOP))		panic("start_userspace : expected SIGSTOP, got status = %d",		      status);	if (ptrace(PTRACE_OLDSETOPTIONS, pid, NULL, (void *)PTRACE_O_TRACESYSGOOD) < 0)		panic("start_userspace : PTRACE_SETOPTIONS failed, errno=%d\n",		      errno);	if(munmap(stack, PAGE_SIZE) < 0)		panic("start_userspace : munmap failed, errno = %d\n", errno);	userspace_pid[cpu] = pid;}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/d67b569f5f620c0fb95d5212642746b7ba9d29e4/process.c/clean/arch/um/kernel/skas/process.c